All Technical Articles - Nanotechnology

Controlling the dimensions of semiconductor nanowires influences the scattering and absorption of light, potentially leading to solar cells with reduced scattering or enhanced absorption.

Antenna resonances play a crucial role in the operation of a metallic carbon nanotube probe in a scanning near-field microscope.

Reversible, controlled creation of patterns of topological defects in liquid crystals is achieved using focused beams with optical phase singularities.

Combining suitable nanomaterials and unconventional fabrication techniques marks a step forward in realizing less expensive, smaller-footprint, all-optical circuits on a chip.

A new, seamless, sample-to-answer technology (high-conductance dielectrophoresis) enables rapid analysis of high-molecular-weight DNA clusters and drug-delivery nanoparticles based directly on whole blood.

Portable optical devices capable of real-time, in situ sensing and characterization of individual nanoparticles and pathogens could offer unprecedented benefits in a range of applications.

A novel solid-state, subwavelength laser characterized by efficient, enhanced spontaneous emission and thresholdless operation represents significant progress toward nanoscale coherent light sources.

High photocurrent densities are possible with hematite photoelectrodes using only inexpensive, scalable processing techniques.

State-of-the-art, triple-junction, quantum-dot-enhanced photovoltaic devices exhibit increased output current and increased efficiency.

Whether as used for circuitry for displays and detectors or oxidized to produce emissive materials, graphene promises to advance photonics

Exploiting the versatility of nanoparticles results in more effective light-based destruction of tumor cells than can be achieved using conventional phototherapy approaches.

Demonstrations of photonic quantum-information science, including an integrated circuit that can factorize the number 15, promise applications on a feasible scale.

Matching integral multiples of lattice planes provides a new paradigm for epitaxy across the ‘misfit’ scale that promises to increase the scope of materials for smart devices.

Gold nanorods are emerging as a powerful solution for various minimally-invasive biomedical applications, including laser bonding of connective tissues.

Fast screening of antibody-secreting cells by extraordinary optical transmission could be a new mechanism for drug discovery.

Electronic excitation of particles in fluorescent materials can now be controlled using laser-assisted energy-transfer techniques.

New fabrication methods and measurement techniques enable development of nanoscale bimorph actuators.

Silicon-based nanostructures enable a wide range of cheaper, faster, and more efficient devices.

Chemical grafting of carefully chosen conducting particles to a dielectric elastomer can enhance physical changes that occur when a voltage is applied.

A novel approach using ambient-light irradiation can produce twisted nanostructures of variable pitch length with many potential applications.

Narrow-bandgap quantum dots emitting at IR wavelengths may be ideal materials for solar-energy harvesting.

Increased performance can also be achieved for photon-sensing devices such as photodetectors and thermo-photovoltaic devices.

Selective, reversible alteration of optical properties can be achieved by applying a small voltage to photonic crystals.

Self-powered, integrated systems-on-a-chip are key to developing extremely low-power devices for applications in commercial, defense, space, harsh-environment, and medical settings.

A novel, molecular self-assembly technique produces almost perfectly shaped plano-convex optical lenses for high-quality imaging that surpasses the fundamental resolution limit of a regular optical microscope.

An optical nanostructure based on single-crystal nanowire diamond may be used as an efficient source of single photons.

Efficient and significant field-intensity enhancement at telecommunications wavelengths using near-field microscopy opens up exciting perspectives for practical applications of nanofocusing.

A novel microfluidic chip produces single-molecule containers with high precision, facilitating studies of chemical reactions at the lowest possible reagent levels.

Optical data routing beyond 100Gb/s is now possible with a new generation of power-efficient, all-optical wavelength converters.

Incorporating nanoparticles made of dielectric rather than plasmonic materials reduces parasitic absorption and results in more efficient silicon photovoltaics.

Carefully positioned potential barriers suppress photocarrier capture by quantum dots.

Novel organic-inorganic composites improve the current density of photodetection and photovoltaic devices.

Nanoscale metamaterials enable development of novel nano-optical lenses.

Microspheres inside capillaries or hollow waveguides permit compact focusing of light from multimodal sources.

Recent advancements in nanopillar arrays lead to more cost-effective photovoltaics.

Fabrication of nanoscale sensors with robust capabilities is streamlined by site-specific synthesis, self-assembly, and integration of nanostructures into two-terminal micro-nano systems.

A new class of remarkable materials are much smaller and more tunable than their ordinary metamaterial counterparts, which enhances their practical potential.

Novel solid-state emitters and detectors exploit electronic-charge vibrations to improve the operating frequency of devices intended for safety and security applications.

Inserting indium arsenide quantum dots into crystalline III-V semiconductor-based photovoltaics results in both enhanced short-circuit current and improved efficiency.

Efficient light trapping using localized surface plasmons in metal nanoparticles depends critically on optimizing particle properties.

Novel materials exploit the favorable transfer of energy between metal nanoparticles and polymer molecules to sidestep problems that have been holding back all-optical-based technologies.

A novel approach that notably improves the photophysical properties of fluorophores enables development of advanced biomedical applications.

Distance-dependent coupling of plasmon resonances between closely spaced metal nanoparticles offers an attractive approach for imaging molecular interactions.

A novel light source and integrated photonic device can manipulate, sort, and select complex semiconductors and/or nanoparticles.

Integration of biological molecules into nanoelectronic devices promises new, sophisticated biointerfacing technologies.

Communication between organizations is key to developing a coherent set of regulations to address known and unknown nanotech risks.

Chemical-free metal nanoparticles do not aggregate in water, even if they are not stabilized by surfactants.

Plasmonic lenses can be made extremely small to enable integration into focal-plane array detectors for full Stokes-parameter polarimetric imaging.

A new type of liquid-crystal device has been fabricated to generate a tunable, graded refractive index across the depth of each pixel.

Using light to inject a single nanosized biosensor into a mammalian cell enables analysis of its biochemistry.

The exceptional flexibility and diversity of artificial media make it possible to adjust their properties on the fly, with potential practical use in areas such as sensing and switching.

Laue scattering of visible light with an internal refractive-index contrast of less than 1% shows that kinematic-scattering theory is applicable.

Single atoms mediate interactions between modes of light, making optical quantum computing possible even without using single photons or nonlinear optics.

High-quality, compound semiconductor nanowires can be fabricated using metalorganic chemical-vapor deposition with gold nanoparticles as catalysts.

The favorable properties of polymer electrolytes made from natural products render these materials good candidates for application in optoelectrochemical devices.

New silica-nanoparticle-doped multistable LCDs offer fast response times in dynamic and multistable modes.

With wavelength tuning of the light source, the action of a DNA-based nanomachine is accelerated as much as ten times and achieves a repeatable operation with high transition efficiency.

An optical-quantum-circuit entanglement filter can pass a pair of photons with the desired polarization correlations.

Doughnut-shaped laser beams hold promise for touch-free, selective catching, holding, and transporting of absorbing particles in the air.

A new family of coating systems provides self-decontamination against dust and biological pathogens for future space exploration.

The former president of MIT spoke at the SPIE Optics + Photonics Symposium Awards Banquet.

Infiltrating the air holes of a lattice with liquid enables construction of thermally stable resonant devices.

A method for identifying key gas-detection mechanisms correlates reactions at the semiconductor surface with changes in electrical conductivity.

Metal complexes reacting in common organic solvents at a relatively low temperature can generate homogenous structures in a large variety of controlled shapes and sizes.

Incorporating crystalline nanoparticles in tunnel junctions dramatically reduces electrical and optical absorption losses in solar cells, as well as mid-IR and telecommunications lasers.

A novel nanoparticle-tracking technique provides a simple and direct qualitative view of a sample.

A spin-dependent topological deflection of classical light propagates along a smooth helical trajectory.

Characterizing how nanoparticles affect organs and accumulate in tissue may provide insight into their safety as a potential cancer therapy

Ultra-secure quantum cryptography is realized through the wave function collapse of coherent photons.

Interfering femtosecond lasers induce arrays of nanoliquid metals, enabling the creation of mesoscopic materials on >7nm scales.

Surface nanoparticles of zinc metal and bulk zinc and oxygen vacancies are produced by irradiation of single-crystal zinc oxide with 193nm excimer-laser light.

Nanostructured composites absorb light and manipulate a fundamental property of surfaces to generate locomotion of objects on liquids.

A new class of photonic-crystal fiber with a hollow core and various lattice modifications may be an important component for biosensing applications.

Room-temperature lasing in cavities with a mode volume of 0.017μm³ and a high quality factor is achievable.

Oblique-angle deposition, an industrial workhorse technique, has been used to deposit silver thin films that should refract negatively in the visible regime.

Sub-Angstrom-resolution sensing of tiny cantilevers is leading the way to a gentle physical probe for surfaces of materials such as living cells.

Harnessing the oscillation of electrons on conductor surfaces can effectively enhance the performance of organic photovoltaic cells.

A new system offers an affordable and versatile alternative for applications requiring actuation and sensing at very small resolution.

An extreme-high-resolution instrument is opening up new possibilities for industrial and research applications, expanding what was previously thought possible.

Reflection can be greatly reduced by graded refractive-index layers fabricated in a simple, scalable process.

Multiscale simulations, including nonclassical effects, predict a fundamental scaling limit for micro-electromechanical systems.

A dedicated finite-element solver enables accurate and fast simulations of light interaction with metallic nanostructures.

Hybridizing plasmonic structures with optically nonlinear material may enable the creation of an optical analog to the electronic circuit.

An advanced simulation supports semiconductor manufacturing and facilitates the development of new patterning techniques for micro- and nanodevices.

Frameworks with adjustable nanoporosity, high surface area, and many known structures may pave the way for portable, low-cost chemical sensors.

Careful selection of molecular contributors as well as control of bonding strength and geometry will lead to new engineering approaches to create organic molecular devices and materials.

Acid etching followed by vapor texturing has the potential to reduce reflectance and improve the efficiency of nanostructured photovoltaics.

Laser light can induce binding or repulsive forces between particles and thus facilitate manipulation of nanoparticle arrays.

A single semiconductor quantum dot that is strongly coupled to a photonic crystal nanocavity yields optical nonlinearities at the single photon level.

Novel copper electrodes offer high electrical conductivity and optical transparency, which facilitate low-cost, high-performance organic photovoltaic production.

Reliable mass spectrometers developed for spaceflight instruments could benefit future terrestrial applications.

Progress in the fabrication, assembly, and manipulation of nanotubes and graphene-based materials promises many technological advances.

Even after multiple applications of sunscreen, the UV-blocking particles remain localized close to the skin surface and produce insignificant numbers of free radicals.

Research on cellulose nanocrystals may provide a viable alternative to other reinforcing fibers in commodity fiberthermoplastic composite materials.

Simulating the way light travels in objects with refractive indices below unity allows rendering of complex, lifelike scenes.

A carefully patterned metal surface may strongly localize microwaves, thus enabling novel microwave-technology developments.

Electrophoretic deposition of multilayered structures of carbon nanotubes and nanocrystals produces nanomaterials containing homogeneous films with sharp interfaces.

Pillared graphene provides a stable architecture for enhanced fuel storage.

A commonly used subwavelength component of metamaterials can excite unusual electric and magnetic properties and enable nanophotonic applications

The electronic properties of nanowires can be improved by making them from novel materials rather than carbon.

Vertically self-aligned, GaN nanorod arrays grown by plasma-assisted molecular-beam epitaxy demonstrate properties with important implications for optoelectronic applications.

Networks composed of single-crystalline nanowires and nanoparticles of zinc and titanium oxides can form innovative photoanodes to enhance performance of dye-sensitized cells.

A chip-scale optomechanical system with extremely low dissipation might enable the observation of quantum behavior in tangible objects visible to the naked eye.

Columnlike liquid crystals can be applied as small, lightweight sources of power for vehicles and mobile devices.

Near-IR fluorescent dye encapsulated in calcium-phosphate nanoparticles maintains enhanced brightness for up to four days in human breast-cancer tumors systemically injected into live mouse models.

Plasmon coupling facilitates detection of direct contacts between optically colocalized gold nanoparticles in optical wide-field microscopy.

A comparison of electron-energy-loss measurements and optical spectroscopy shows that both are required to access the full dielectric surface-plasmon behavior of nanoparticles.

Use of a photoresist material and a low-fluence excimer laser can pattern carbon nanotubes cleanly and inexpensively.

New 1D laser designs and improved physical insights can potentially lead to development of the smallest lasers.

See-through fish embryos help to demonstrate the advantages of an integrated approach in testing how small particles can alter living organisms.

Employing a top nanolayer characterized by a high refractive index increases the electromagnetic field at the sample interface and, correspondingly, sensor responsiveness.

Position-controlled growth of nanoarchitectures through the selective formation of nanowalls represents a critical advance in fabricating high-performance nanodevices.

Metal-reducing bacteria can construct electrically conductive networks using semiconductive nanominerals.

Optical trapping and manipulation of carbon nanotubes using optical tweezers leads to next-generation photonic force microscopy.

A water-resistant surface inspired by the lotus leaf could enable applications in microfluidics, underwater coatings, and controlled deposition.

Tiny nanotube sensors promise advances in scanning technology and offer new interfaces to the physical world.

A single electron spin in a semiconductor nanostructure, which serves as a single quantum bit, is manipulated in a few picoseconds using optical pulses.

Carbon-nanotube doping of liquid-crystal layers results in much faster response times.

Ferroelectric nanotubes that produce intense, high-frequency emissions may lead to new medical, military, and security devices.

Microchambers in photostructurable glass enable the dynamic observation of aquatic microorganisms.

Electric signals generated in graphene-based nanofilms at 260-5000nm reproduce the temporal profile of their laser excitation pulses and open promising avenues for the development of ultra-broadband fast sensors.

3D-metrology is becoming mandatory for nanofabrication in the production environment.

Varying the input power can tune materials to be either transparent or opaque at microwave frequencies.

Integration of highly sensitive photonic biosensors and microfluidic technologies provide new possibilities for molecular diagnostics.

The controlled growth and alignment of carbon nanotubes and peptide nanoarrays offers new avenues for nanodevice fabrication.

A reflection grating written on a novel, all-solid, silica-based fiber with a 2D core offers advantages over previous devices.

Quantum-dot nanoprobes enable real-time quantitative noninvasive assessment of epidermal growth-factor receptor in animals transplanted with human cancer cells.

A liquid phase process for making defect-free graphene in high yield could pave the way for superfast transistors.

By raising the temperature in tumors, optically activated nanoparticles can make existing treatment more powerful.

Using solar power to derive hydrogen from hydrogen sulfide could reduce pollution and generate renewable energy.

Novel surface-plasmon-polariton wave behavior at the planar boundary of a metal and a sculptured thin film could lead to advanced applications in chemical detection and nanoscale circuits.

New polymers with tailored optical properties show promise as coatings for commercial electronic components.

The creation of homogeneous functional thin films is greatly improved using a single chemical compound to control film growth.

Nanocomposites synthesized from different combinations of nanoparticles and matrix materials demonstrate notably increased strength, thermal stability, and electrical conductivity.

Observing surface-texture evolution of nanocrystalline films in situ using reflection high-energy electron diffraction aids in creating novel nanostructures.

Nanoparticles doped with lanthanides such as holmium and thulium possess useful optical properties for a range of applications including computer displays, lasers, and bioimaging.

The conformal-evaporated-film-by-rotation technique generates synthetic, faithful replicas of biological structures, with broad potential application.

A theoretical analysis considering quantum confinement of ‘holes’ in nanowires points to a useful tool for future-generation nanoscale electronics.

Novel coatings composed of carbon nanotubes embedded in cadmium arachidate matrices improve the robustness and performance of fiber-optic chemical sensors.

Novel optical coatings enable cost-efficient, quick, and convenient analysis of contaminants in drinking water using miniature sensing equipment.

A new 3D computational approach constructs realistic optical phase contrast microscope images of gold nanoparticles in biological cells.

A multi-layer configuration yields blue quantum-dot LEDs with qualities that are comparable to red and green ones, thus facilitating applications in full-color displays and solid-state lighting.

The low optical reflection from nanowire arrays could be exploited to improve the photon absorption efficiency of solar cells.

Adding a special lens between an object and a conventional optical microscope can improve image resolution to below the diffraction limit at visible wavelengths.

Nanoelectromechanical switches based on carbon nanotubes hold significant promise for use in high-frequency and extreme-environment applications

Do the permittivity and permeability of thin metamaterial layers actually measure polarizations in the structure?

The detonation of silica-gold nanoshells at energy levels safe for normal tissues and their unprecedented low threshold for vapor bubble formation in solution highlight an advance in cell-killing nanotechnology.

Exquisite control over an anodically formed TiO₂ nanotube array architecture, large internal surface area, and lower recombination allows for low-cost high-efficiency hybrid inorganic-organic solar cells.

Storing light inside solid-state materials may speed up communication networks and information processing.

A theoretical investigation of aperture systems sheds light on the interplay between geometrical parameters and physical phenomena, and the accessibility of several potential new applications in optics.

Organic nanowires self-assembled in situ and integrated into polymer LEDs double the device performance without complicating fabrication.

Multiple wavelengths emitted by a semiconductor laser can be used as independent channels for simple and affordable high-bandwidth parallel optical interconnects in photonic integrated circuits.

Ultra small cavities can be fabricated in a silicon ridge waveguide with quality factors in excess of 60,000.

Pairs of nanopatterned metallic ellipses form antennae that couple optical radiation with localized excitations and enhance fluorescence, with possible applications including biosensing and optoelectronic integration.

On-wire lithography is a new nanofabrication technique that can be used to design functionalized nanowires for both encoding and biosensing applications.

A layered photonic crystal structure enhances nonlinear optical properties of a dopant dye.

A new method of construction that permits short wavelength lasing could lead to light sources suited to a number of sophisticated scientific and engineering applications.

DNA-based materials possess unique electromagnetic and optical properties and may lead to improved performance for organic-based devices.

Dipolar solvents may improve the morphology of organic polymer junctions and increase the efficiency of low-cost photovoltaic materials.

The new class of contrast enhancement agents can be precisely tuned to aid in vivo photoacoustic tomography.

A nanostructured optical system based on polaritonic crystals and a liquid crystal layer can modulate light transmission up to 100Hz.

Optical fibers with bending loss several hundred times lower than standard single-mode fibers reduce installation costs for applications in multi-dwelling buildings.

Semiconductor quantum dots integrated in nano-cavities exhibit atom-like properties that can make them useful for the design of functional quantum information networks.

A carbon-nanotube field-effect transistor reliably detects single-electron events at a relatively high temperature of almost 150K.

Nano-engineered devices could enable energy-conversion efficiencies on par with bulk silicon technologies, with a cheaper manufacturing process.

The high spatial resolution of cathodoluminescence helps to provide information about inhomogeneities in semiconductor-based nanowires.

The artificial atomlike properties of self-assembling quantum dots enable high-operating-temperature long-wavelength IR focal plane arrays.

A silicon microring resonator based on shifts induced by the thermal nonlinear effect shows promise for managing delays in data transmission with minimal distortion.

Energy from sources such as body movement or blood flow is converted to electrical energy by deforming piezoelectric semiconducting nanowires.

The surprising pattern of luminescence from a zinc oxide nanowire has significant implications for light-matter interaction and optoelectronic applications.

Highly efficient carbon nanotube field-effect transistors employing scandium contacts could help usher in the next generation of nanoelectronic devices.

Cathodoluminescence can be used to investigate resonant plasmonic phenomena with unprecedented resolution of mode excitation.

A new Raman spectroscopy technique reveals both the chemical composition and spatial resolution of nanomaterials.

A new strategy for designing optical fibers enables coverage of a wide frequency range with the potential to generate ultrashort pulses.

A stationary tomosynthesis mammography system with a carbon nanotube-based x-ray source array can shorten imaging time and improve image quality.

Single-wall carbon nanotubes improve the performance of organic photovoltaics and could bring them closer to practical implementation.

Nanophotonics has huge application potential in medicine, provided that concerns about toxicity can be addressed.

Nanozeolites incorporated into photopolymerizable holographic recording materials can be used for holographic sensing, data storage, and optical systems design.

Analogs of diffractive and refractive optics in free space can be developed to manipulate surface plasmon waves.

Quantum-mechanical calculations can provide fundamental insights into structure for improving organic devices and molecular electronics.

Femtosecond pulse technology can isolate and penetrate embryonic cells for delivery of nanoparticles and DNA.

Exploiting the unique properties of mass-producible photonic crystals could lead to more efficient and accurate biological assays.

Arranging carbon nanotubes in arrays of bundles creates high-performance electron-field-emission sources that enable smaller instruments for space and defense applications.

A combination of simulation and experiment seeks a way to control the unfortunate tendency of carbon nanotubes to stick together.

Applying a voltage to a computer-generated hologram recorded in a polymer and liquid crystal composite creates a fast, switchable vortex light beam for advanced applications.

Optimization of annealing conditions significantly increases the short-circuit current density of nanotube-based solar cells.

In-situ polymerization methods can be used to fabricate highly functional composite materials for applications ranging from flexible electronic devices to wearable e-textiles.

Optical control of individual electron and nuclear spins in a diamond host can be used to construct scalable quantum computers, repeaters, and quantum memories, with much achievable at room temperature.

Irradiating carbon nanotubes with an electron beam provides clues to how they form and provides an alternative route for generating them.

Self-assembled quantum dots embedded in microcavities show strong room-temperature photoluminescence.

The nonlinear optical properties of dispersions of single-walled carbon nanotubes make them attractive for use in laser-protective eyewear.

Theory-guided definition of key structure and function relationships has dramatically improved the performance of organic nonlinear optical materials.

Laser- and nanoparticle-based processing methods enable high-resolution, maskless fabrication of inexpensive large-area flexible electronics on polymer substrates.

When combined, nanoassembly and microlithography prove effective techniques for making very flexible cantilevers using carbon nanotube composites.

New strategies have been developed for producing crystalline nanostructures that emit strongly in the near infrared for nanoscale optoelectronic platforms.

Bringing a nanoscale tip into the evanescent near field of a nanocavity shifts the resonance and allows switching of photon transmission.

Gate-dielectric breakdown in field-effect transistors depends not only on the gate dielectric but on the electrode materials and the overall structure.

The ordering of carbon nanotubes in polymer hosts can significantly increase charge mobility in photovoltaic devices.

The synthesis of silver colloid particles with controlled size significantly increases the application range of surface-enhanced Raman spectroscopy.

Digital processing for rapid pattern-matching with sub-pixel accuracy can enhance a wide variety of vision-based systems for measurement applications.

Perovskite mixed oxides with exceptionally high specific surface areas can be fabricated for use as efficient catalysts in a wide variety of chemical applications.

Dispersively engineering photonic crystal structures provides tight control for new devices.

The transparency and versatile chemistry of nanocolloids can be exploited to fabricate novel thin films.

Synchrotron radiation-based spectroscopic techniques provide information about the characteristic electronic structure of nanostructured materials.

Transmission enhancement is possible through a broad range by tailoring to desired resonances.

A novel optical diffractive element can be exploited to achieve super-resolution in 3D.

An electrochemical, solution-phase process deposits a controlled thickness, non-covalent layer of silica dielectric on carbon nanotubes.

A new and simple method of growing multiwalled nanotubes significantly enhances their conductivity.

Colloid chemistry methods represent a powerful and versatile tool for fabricating gold nanoparticles with well-defined sizes and shapes.

A new structural model accounts for the curvature inherent in their cylindrical shape.

Illuminating a non-symmetric quantum well with circularly polarized light in the terahertz spectral region causes a spin-polarized electric current.

A paradigm shift in production methods for optical waveguides could make the technology more cost-competitive.

Nanometer-sized gold particles interacting with electromagnetic fields, fluids, and biological objects can be visualized using a specialized imaging technique combined with dark field microscopy.

New materials exhibit a broadband optical limiting response that can be used to protect human eyes, optical elements, and sensors from intense laser pulses.

Femtosecond laser writing and films of carbon nanotubes combine to create a 1.5μm mode-locked waveguide laser that provides 1.6ps pulses.

The structures produced may be useful for a variety of applications, including lab-on-a-chip devices and optical storage of information.

Automatic deposition of copper from nanotubes with attogram precision enables the joining of building blocks for nanoelectronic circuits and nanoelectromechanical systems.

An ultrathin organic self-assembled monolayer gate dielectric enables low-leakage transistor fabrication on a wide range of substrates.

Photonic crystals that enhance the interaction of light and matter achieve the low driving voltage desirable for on-chip applications.

Simple fabrication of controllable periodic void structures is applicable to optoelectronics areas such as 3D photonic crystals.

Attractive antireflection coatings made from nanostructured materials could open the door to more efficient solar cells, much brighter light-emitting diodes, and more.

Carbon-based nanostructures are potential H2 storage devices for automotive applications due to their light weight and useful mechanical and chemical properties.

An atmospheric monitor based on a microcantilever device coated with a reactive metal measures exposure to low levels of corrosive gases.

Highly hyperpolarizable and blue-light-emitting nanofibers have been generated from chemically engineered functionalized quaterphenylene molecules.

A new material could be used both to help regenerate damaged bone and as a reservoir for controlled drug release.

Incorporating gold nanoparticles into viral protein provides a tool for studying viruses.

Direct attachment of carbon nanotubes makes silicon substrates conduct even in the presence of a normally insulating oxide layer.

Laser gas analyzers are an efficient way to study variations in gas-exchange processes between vegetation and the atmosphere under anthropogenic stress.

Laser-induced explosion of absorbing nanoparticles, so-called nanobombs, can kill cancerous cells.

A new technique can immobilize and stretch a large number of DNA molecules for single-molecule DNA analysis applications.

Quantum dots self-assembled into an array enable light to be transmitted in submicrometer widths over straight and 90°-bend waveguides.

New photodynamic cancer therapies combine the tumor detection and imaging capabilities of nanoparticles with the increased penetration depth of infrared two-photon excitation.

Low-cost zinc oxide nanoparticle-based electroluminescent devices with UV emission can be fabricated using a spin-coating method.

Varying pH makes it possible to control conformational changes of polymer chains attached to stimuli-responsive interfaces.

A new method has been developed to fabricate microtube resonators with strong whispering-gallery-mode emission and quality factors up to 3000.

Harnessing quantum interference enables single aromatic annulene molecules to function as transistors.

Combining two types of interferometry reveals in-plane motion with subnanometer resolution.

Dynamic holography reveals the Casimir force between two metallic bodies, and can exploit light pressure to measure its absolute magnitude.

A newly developed nanorobotic manipulation system allows the fabrication of an IR detector with high sensitivity and low noise.

Experiment validates the theoretically predicted high-frequency performance of carbon nanotube field-effect transistors.

Combining time-resolved photon counting, scanning optical techniques, and atomic force microscopy provides new tools for single-molecule investigations.

Solid-state organic photoelectrochemical cells eliminate handling, portability and packaging problems encountered with liquid-based cells.

Structures based on antimonide III-V semiconductor quantum dots can provide communications lasers on inexpensive substrates.

Nanowires grown on a variety of substrates by a vapor-liquid-solid catalytic method point the way to easily commercializable lighting applications.

The high circulating intensities in ultrahigh-Q optical microresonator sensors improve their sensitivity enough to detect a part per million of heavy water in water.

Analysis of the dispersion of electromagnetic waves propagating through finite-thickness charge sheets determines when they can be approximated by zero-thickness conducting interfaces.

Nanocrystals and nanowires for use as active elements in electronic and optical applications can be created using novel, solution-based synthetic methods.

Optimizing a recently discovered quantum dot effect that gets multiple electrons from photons could make a critical difference in photovoltaics.

Researchers combine photonics and nanotechnology to improve drug development and disease detection.

Optical modeling applied to thin-film solar cells can be used to optimize their existing structures, detect limits in efficiency, and devise novel improvements.

A new band-gap tuning technique that uses selective-area epitaxy can fabricate waveguides and self-assembled indium-gallium-arsenide quantum-dot lasers on the same substrate in one step.

The flow of liquid crystals enables precise manipulation of hard-to-handle micro-objects such as microlenses and micromirrors.

Controlled thermal interdiffusion was used to fabricate a two-color InGaAs/GaAs quantum dot IR photodetector with 0.8μm-offset peak responses.

Extended x-ray absorption fine structure can be used to measure local structural properties in nanomaterials, such as bond lengths and their disorders.

New reagents and techniques in cell biology make it possible to visualize cell-signaling mechanisms in real time.

Modeling IR photonic bandgap materials and structures reveals the best defect configurations.

The results of an investigation into the excitation, propagation, and detection of surface plasmon polariton modes, at scales less than 100nm, have been applied to a biochemical sensor.

Understanding how nanostructured materials deform is vital to developing small-scale materials with tailored properties.

Polymeric molecules that expand and contract with temperature are used to connect assemblies of nanoparticles, exemplifying nanoscale devices that can be used as probes for measuring temperature in fluids.

Focused-ion-beam-assisted deposition is used to make a new kind of electrical contact to wires just tens of nanometers in diameter.

A highly sensitive ZnO nanowire field-effect sensor has electrically controlled sensitivity, refreshability, and distinguishability.

The dispersive properties of photonic crystals can be used to fabricate compact devices with a wide range of potential applications.

Lines of bismuth, just 1.5nm wide, can be used as templates for fabricating the nanowires and nanocluster arrays that could eventually make up nanoelectronic devices.

An innovative bio-inspired approach has achieved a strong attachment between polymer sheets and the ceramic films using a buffer nanolayer.

Ordering nanomaterial structures within a conducting polymer host provides a means of controlling the charge balance needed to create truly efficient plastic solar cells.

Interrogating the vibrational modes of nanoparticles with time-resolved optical spectroscopy allows the accurate determination of their elastic constants.

Nano-antennas, designed to detect light in the visible, IR, and beyond, may be used in polarimetric imaging systems, optical sensors, and other applications.

A prototype chemical device can perform micro-stirring, pH measurement and control, and even the sensing of single molecules.

A layer-transfer process can be used to make the very-flat silicon micromirror arrays that may be vital to producing masks for future lithography and direct-writing systems.

Nanochannels with diameters from 15nm to 100nm were fabricated and used to isolate the fluorescence signal from a single molecule.

The liquid/solid interface provides an ideal environment to investigate self-assembly phenomena and to probe the structure and properties of monolayers at the nanoscale.

By using a thermally-induced change in the host structure, the operating wavelength of nanoplasmonics can be reversibly tuned.

Using morphological and electronic design techniques, low-threshold, high-emission current densities have been obtained with ZnO.

Recent advances in modeling the unique optical properties of nanoparticles and nanocomposites pave the way for designing and modeling coatings.

Electrically conducting plastics and nanoparticles aid simultaneous measurement of the activity of many genes.

Nano-textured substrates can be used to trap sunlight and couple it into thin-film silicon solar cells.

Photonic-crystal waveguides that significantly slow light have been exploited to make a silicon modulator with an interaction length of 80μm and a peak drive current of less than 150μA

The synthesis of inorganic materials has been revolutionized by the impact of (soft) chemical approaches that allow us to precisely tune the composition, morphology, and microstructure of the extended solid-state materials produced.

Synthetic oligonucleotides, engineered to self-assemble into periodic 2D arrays, could serve as templates for the fabrication of nanostructures.

Films of heavily-doped conducting polymers allow novel optical devices to be fabricated in the THz spectral range.

Developing low-cost broadband semiconductor IR sources that could enhance the performance and resolution of OCT systems.

Nanostructured compound materials are attracting increasing interest from scientists in fields as different as physics, materials science, chemistry, and biology.

A new microchip analyzes thousands of cells per minute in an enclosed microfluidic environment.

Three-dimensional photonic crystals have properties that may make them useful for sensing physical strain.

Material properties limit silicon's usefulness in electro-optic modulators unless combined with other materials. This article describes a way to do this, paving the way for more effective silicon electro-optic modulators.

DNA can be used to template the assembly of nanowires and nanoswitches from nanoparticles, enabling the next generation of electronic technologies.

In-situ small-angle x-ray scattering experiments show how nanocrystals can self-assemble to form highly ordered super-lattices at the liquid-air interface of an evaporating droplet of fluid.

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From oemagazine January 2002

From oemagazine December 2001

From oemagazine September 2001