Papers – Page 21 – TechConnect Briefs

Resolution Enhancement in Nanoimprinting by Surface Energy Engineering

Jung G.Y., Wu W., Li Z., Wang S.Y., Tong W.M., Williams R.S., Hewlett Packard Laboratories, US

Nanoimprinting lithography was initiated as an alternative way to achieve nanoscale structures with high throughput and low cost. We have developed a UV-nanoimprint process to fabricate 34 by 34 crossbar circuits with a half-pitch of [...]

Nanowire Sensors and Arrays for Chemical/Biomolecule Detection

Yun M., Lee C., Vasquez R.P., Ramanathan K., Bangar M.A., Chen W., Mulchandan A., Myung N.V., Jet Propulsion Laboratory, US

We report electrochemical growth of nanowire sensors using e-beam patterned electrolyte channels, potentially enabling the controlled fabrication of individually addressable arrays. The electrodeposition technique results in nanowires with controlled dimensions, positions, alignments, and chemical compositions. [...]

The Design of a Silicon Wire DRAM Cell for Very Dense DRAM Architectures

Bindal A., Aflatooni K., San Jose State University, US

In this study, we propose a new DRAM cell that uses a silicon-wire pass transistor stacked on top of a high-dielectric capacitor rated of holding industry-standard 32 fCoulomb charge. We show that the performance of [...]

Spin Density Functional Theory Simulations of Quantum Point Contacts: An Investigation of Spin Filtering Effects

Akis R., Ferry D.K., Arizona State University, US

We present simulations of quantum wires and quantum point contacts (QPCs) formed in semiconductor heterostructures. Conductance measurements for such structures is quantized with plateaus at integer multiples of G_0= (2e^2/h) as function of gate voltage, [...]

Electronic Transport Through Carbon Nanotubes – Effect of Contacts, Topological Defects, Dopants and Chemisorbed Impurities

Maiti A., Hoekstra J., Andzelm J., Govind N., Ricca A., Svizhenko A., Mehrez H., Anantram M.P., Accelrys Inc., US

Electronics based on carbon nanotubes (CNT) has received a lot of attention recently because of its tremendous application potential, such as active components and interconnects in nanochips, nanoelectromechanical systems (NEMS), display devices, and chemical and [...]

Single-Crystal Nanowire Transistor for Logic and Memory Applications

Yu B., Ye L., Meyyappan M., NASA Ames Research Center, US

In this paper we report chemical synthesis, device fabrication, and device physics investigation of 1-D single-crystalline nanowire field-effect transistor (SNW-FET) for logic and memory applications. Wafer-scale transistor arrays were fabricated with semiconducting nanowires serve as [...]

Implementation of Separable Scattering Mechanisms in Three-Dimensional Quantum Mechanical Simulations of a Silicon Quantum Wire

Gilbert M.J., Akis R., Ferry D.K., Arizona State University, US

In order to understand the operation of any type of semiconductor device, one must consider the effects of scattering. For many years, Monte Carlo has been the workhorse that has yielded great insight into the [...]

Growth and Characterization of GaAs/AlGaAs Core-Shell Nanowires and AlGaAs Nanotubes

Noborisaka J., Motohisa J., Hara S., Fukui T., Hokkaido University, JP

We report on the fabrication of GaAs/AlGaAs core-shell nanowires (NWs) and AlGaAs nanotubes by SA-MOVPE and their photoluminescence characterization. The fabrication started from a preparation of patterned GaAs (111) B substrates partially covered with SiO2 [...]

Growth of Carbon Nano-Structures in Ceramic Materials

Kufazvinei C., Leahy R.W., Lipson S.M., Blau W.J., Dillon F.C., Spalding T.R., Morris M.A., Holmes J.D., Allan G., Patterson J., Trinity College Dublin, IE

The investigation aims at growing carbon nanotubes of controlled diameter from inside pores of ceramic materials. The resulting carbon nanotubes will then be used in electrons as thermally conductive substrates in die mountings.

Nanopillar Arrays with Superior Mechanical Strength and Optimal Spacing for High Sensitivity Biosensors

Anandan V., Rao Y.L., Zhang G., University of Georgia, US

Recently, many types of vertically aligned slender nanostructures, such as nanotubes and nanorods have been fabricated for use in biosensors development because of their increased surface area. Lately, evidence has emerged to reveal that these [...]