Keyword: Nanotechnology

Who's Who: Unmanned Systems

NASA recently tested the Nano ChemSensor, the first nanotechnology- based electronic device to fly in space. The test showed that the sensor could monitor trace gases inside a...

Briefs: Photonics/Optics

A simplified method of generating a beam of light having a relatively high value of angular momentum (see figure) involves the use of a compact apparatus consisting mainly of a...

Briefs: Physical Sciences

A recently proposed boundary condition for atomistic computational modeling of semiconductor nanostructures (particularly, quantum dots) is an improved alternative to two prior...

Briefs: Nanotechnology
Nanotube Dispersions Made With Charged Surfactant

Dispersions (including monodispersions) of nanotubes in water at relatively high concentrations have been formulated as prototypes of reagents for use in making fibers, films, and membranes based on single-walled carbon nanotubes (SWNTs). Other than water, the ingredients of a dispersion of this...

Briefs: Nanotechnology

Nanotechnology breakthroughs are happening every day. NASA Tech Briefs' Nano 2005 nano engineering conference, November 10-11 at the Marriott Boston Newton, will help you keep pace with the engineering...

Briefs: Materials
More About Arc-Welding Process for Making Carbon Nanotubes

A report presents additional information about the process reported in "Manufacturing High-Quality Carbon Nanotubes at Lower Cost"; (GSC-14601) NASA Tech Briefs, Vol. 28, No. 9 (September 2004), page 62. To recapitulate: High-quality batches of carbon nanotubes are produced at...

Briefs: Electronics & Computers

Thin, transparent layers comprising mats of carbon nanotubes have been proposed for providing lateral (that is, inplane) electrical conductivities for collecting electric currents...

Articles: Photonics/Optics

Nano-optics is a valuably novel class of technology that takes advantage of light’s unique interaction with subwavelength, nano-scale patterned materials, and nanotechnology-enabled fabrication methods to create a broadly...

Briefs: Manufacturing & Prototyping
Manufacturing High-Quality Carbon Nanotubes at Lower Cost

A modified electric-arc welding process has been developed for manufacturing high-quality batches of carbon nanotubes at relatively low cost. Unlike in some other processes for making carbon nanotubes, metal catalysts are not used and, consequently, it is not necessary to perform...

Briefs: Medical

A novel treatment for retinal degenerative disorders involving transplantation of cells into the eye is currently under development at NASA Ames Research Center and Stanford...

Briefs: Manufacturing & Prototyping

A low-temperature plasma process has been devised for attaching specified molecular groups to carbon nanotubes in order to impart desired chemical and/or physical properties to the...

Briefs: Manufacturing & Prototyping

A recently invented method of fabricating periodic or otherwise ordered nanostructures involves the use of chaperonin polypeptides. The method is intended to serve as a potentially...

Briefs: Manufacturing & Prototyping
Automatic Control of Arc Process for Making Carbon Nanotubes

An automatic-control system has been devised for a process in which carbon nanotubes are produced in an arc between a catalyst-filled carbon anode and a graphite cathode. The control system includes a motor-driven screw that adjusts the distance between the electrodes. The system also...

Briefs: Manufacturing & Prototyping

A method, now undergoing development, of forming nanochannels in planar substrates is intended to enable the fabrication of advanced fluidic devices that could be integrated with...

Briefs: Physical Sciences
Swarms of Micron-Sized Sensors

A paper presents the concept of swarms of micron-sized and smaller carriers of sensing equipment, denoted generally as controllable granular matter, to be used in exploring remote planets and interplanetary space. The design and manufacture of controllable granular matter would exploit advances in...

Briefs: Photonics/Optics

Electromechanical resonators of a proposed type would comprise single carbon nanotubes suspended between electrodes (see Figure 1). Depending on the nanotube length, diameter, and...

Briefs: Photonics/Optics
Briefs: Electronics & Computers

Since its invention in 1948, the transistor has revolutionized everyday life. The electronics revolution is based on miniaturization of transistors; smaller transistors are faster,...

Briefs: Electronics & Computers

Capacitors in which the main dielectric layers are made from sintered nanocrystalline BaTiO3 have been fabricated and tested in an initially successful and continuing...

Briefs: Photonics/Optics
Capture and Escape of Charge Carriers in Quantum Dots

A report describes an experimental investigation of effects of thermally induced intermixing of In0.6Ga0.4As and GaAs on the dynamics of photoexcited charge carriers in In0.6Ga0.4As/GaAs quantum dots. The quantum dots (nanometer-size islands of...

Briefs: Photonics/Optics

Integrated-circuit imaging devices of a proposed type would contain planar arrays of microscopic sensors that would exploit giant magnetoresistance (GMR). Each GMR sensor in such a...

Briefs: Electronics & Computers

In today's manufacturing world, the need for ultraprecise position measurement and control grows as feature sizes shrink in the semiconductor industry and the world of...

Briefs: Electronics & Computers

A class of developmental asymmetric electrochemical capacitors is based on (1) nonpolarizing positive electrode made of nanotructured γ-MnO2, (2) aqueous electrolyte ,...

Briefs: Electronics & Computers
Carbon Nanotubes as Anodes in Rechargeable Lithium-Ion Cells

Carbon nanotubes (also known as "bucky tubes") have shown promise for use as anode materials in rechargeable lithium-ion power cells. In comparison with graphite and other forms of carbon used under identical conditions, bucky tubes exhibit greater specific discharge capacity and...

Briefs: Robotics, Automation & Control

Small, lightweight sensors that exploit the unique characteristics of nanoceramics are being developed for use in measuring air/fuel ratios in the exhaust gas flows of advanced aircraft...

Briefs: Electronics & Computers

Early experiments in a continuing research program have demonstrated that thermal batteries made from powdered solid electrode and electrolyte materials can be improved by use of smaller...

Briefs: Materials

A rapid densification technology uses nanostructured powders to produce ceramic devices and components. This technology provides ceramic monoliths and composites that can be used in the...