US – Page 322 – TechConnect Briefs

Theory/experiments of X-Ray flux effect on periodic lattice distortions in YBCO

Sahibudeen H.S., Navacerrada M.A., Acrivos J.V., San Jose State University, US

The dynamics for the effect of X-ray flux on periodic lattice distortion waves in YBCO (YBa2Cu3O7-d) 50nm films on STO *SrTiO3) is described: The X-ray flux r(t)=photons/s can induce many possible resonant excitations between states, [...]

Integrating 1D Nanostructures in Devices and Circuits for Massively Parallel and Manufacturable Nanoscale Electronics and Photonics

Saif Islam M., Choudhry A., Fong E., University of California Davis, US

A key barrier to wide-scale integration of functional nanowires in devices and systems is the difficulty in forming reproducible and efficient contacts to them. Unlike the research-based approach of sequentially connecting electrodes to individual nanowires [...]

Engineering the Spectral Response of Waveguide Bragg Gratings Patterned by Deep Ultraviolet Nanolithography

Greiner C.M., Iazikov D., Mossberg T.W., Ticknor A., McGinnis B., LightSmyth Technologies, US

Recent advances in deep ultra-violet (DUV) photolithographic patterning tools have enabled the scribing of essentially arbitrary diffractive structures with feature sizes even below 100 nm that can be precision-placed to within a few nanometers in [...]

Individual Carbon Nanotube Cold Field Emitters: Experimental and Modeling Studies of Integrated System Architecture

Niemann D.L., Ribaya B.P., Gunther N., Rahman M., Leung J., Nguyen C.V., Eloret Corp, NASA Ames Research Center, US

Individual carbon nanotube (CNT) cold field emitters are promising point electron sources because of their low energy spread, high brightness, and low power consumption [1-3]. Potential high-resolution applications for these efficient electron sources include advanced [...]

Carbon Nanotube Transistors with 60mV/decade Switching and its Capacitance Measurement

Lu Y., Dai H., Nishi Y., Stanford University, US

Recently, we have been able to approach the ultimate vertical scaling limit of carbon nanotube field effect transistors (FETs) and reliably achieve S ~ 60 mV/decade at room temperature, by non-covalent functionalization of single walled [...]

Studies of Nanotube-based Co-axial and Resonant Oscillators

Xiao S.P., Andersen D., Hou W.Y., The University of Iowa, US

In this paper, we first investigate mechanisms of nanotube-based co-axial oscillators, shown in Figure 1, based on molecular dynamics simulation. We mainly study the interlayer friction between the outer tube and the inner tube when [...]

Low-temperature growth of carbon nanofibers by selective heating of catalyst

Vasenkov A.V., Kolobov V.V., Melechko A.V, CFD Research Corporation, US

A critical technological challenge for many potential carbon-nanotubes (CNT) and carbon nanofibers (CNF) applications is to have a process for a direct synthesis of aligned/micropatterned CNTs/CNFs on temperature-sensitive surfaces. Currently there is no process that [...]

Catalytically active nanostructures derived from self-assembled block copolymer templates for rationally synthesizing single-walled carbon nanotubes and understanding the growth mechanism

Lu C., Lu J., Fu Q., Lu C., Lu J., Liu J., University of California, Merced, US

Employing self-assembled catalyst-containing block copolymer templates, we have successfully generated a variety of highly ordered and uniform-sized catalytically active transition metal nanostructures. These catalyst-containing nanostructures have been used to produce high-quality and single-walled carbon nanotubes [...]

Electrical Contacts to Nanotubes and Nanowires: Why Size Matters

Leonard F., Talin A.A., Sandia National Laboratories, US

Electrical contacts play a key role in electronics. As new materials such as nanotubes and nanowires are explored for nanoelectronics, the fundamental aspects of electrical contacts need to be re-examined due to the unique properties [...]

Development of Carbon Nanotubes Vacuum Field Emission Devices

Kang W.P., Wong Y.M., Davidson J.L., Kerns D.V., Huang J.H., Galloway K.F., Vanderbilt University, US

This report focuses on the design, fabrication and characterization of vacuum field emission (VFE) devices, specifically on the triode and integrated differential amplifier (diff-amp), utilizing CNTs synthesized by microwave plasma chemical vapor deposition in conjunction [...]