US – Page 215 – TechConnect Briefs

Effect of Source, Surfactant, and Deposition Process on Electronic Properties of Nanotube Arrays

Jain D., Rouhi N., Rutherglen C., Burke P.J., University of California Irvine, US

Carbon nanotubes are currently being sought as a potential candidate in the device research area. However, a scalable manufacturing technology for nanotube devices with appropriate yield, reproducibility, and performance in various metrics (mobility, on/off ratio, [...]

Tuning the electronic and chemical surface properties of graphane combining alkali deposition and low-energy ion irradiation

Heim B., Allain J.P., Zemlyanov D., Taylor C.N., El-Atwani O., Purdue University, US

The presence of defects in graphene due to thin-film processing can lead to alterations of its electronic properties. Tuning of graphene’s electronic properties could be achieved through control of thermal deposition of alkaline dopants (e.g. [...]

Quantum Electrodynamics of Nanosystems

Masood S.S., Univ. of Houston Clear Lake, US

Quantum description of mulitiparticle nano-systems was studied in a hot and dense electromagnetic media. We use renormalization techniques of quantum field theory to show that the electromagnetic properties like electric permittivity and magnetic permeability depend [...]

Fabrication of Nanoporous Ultrananocrystalline Diamond Membranes

Makarova O.V., Divan R., Moldovan N., Tang C.-M., Creatv MicroTech, Inc, US

Nanoporous membranes engineered to mimic natural filtration systems can be used in smart implantable drug delivery systems, bioartificial organs, and other novel nano-enabled medical devices. The ultrananocrystalline diamond (UNCD) porous membranes will open new opportunities [...]

Large area graphene sheets synthesized on a bi-metallic catalyst system

Dervishi E., Li Z., Shyaka J., Watanabe F., Biswas A., Umwungeri J.L., Courte A., Biris A.R., Biris A.S., Biris A.R., Biris A.S., University of Arkansas at Little Rock, US

Few layer graphene sheets were synthesized on a bimetallic catalyst system utilizing acetylene as the hydrocarbon source. This is a low-cost method for large scale production of graphene via radio-frequency chemical vapor deposition. The as-produced [...]

Direct growth of carbon nanotubes on a plastic substrate

Carnahan D., Esposito D., Izrailit I., Vasenkov A.V., CFD Resarch Corporation, US

The deficiency of carbon nanotube (CNT) growth on temperature-sensitive substrates such as plastic tapes impedes the further progress in CNT electronics. We report a novel method that is able to offer the solution by selectively [...]

Catalyst-Free Synthesis of Carbon Nanotubes with Low-Intensity Lasers

Krishna V., Koopman B., Moudgil B., University of Florida, US

We have discovered a novel method of synthesizing carbon nanostructures such as single-wall carbon nanotubes (SWNTs), multi-wall carbon nanotubes (MWNTs) and carbon onions. The advantages of our method include, catalyst-free synthesis of CNTs at room [...]

RNA Functionalized Carbon Nanotube for Chemical Sensing

Chen M., Datta S.A., Khamis S.M., Fischer J.E., Johnson Jr. A.T., Simmons College, US

We demonstrate a versatile class of nanoscaled chemical sensors based on single stranded RNAs as the chemical recognition sites and single-walled carbon nanotube field effect transistors (SWNT-FETs) as the electronic readout components. Motivated by our [...]

Carbon Nanotube Field Effect Transistors using Printed Semiconducting Tubes

Rouhi N., Jain D., Zand K., Burke P.J., Univ. of California-Irvine, US

Purified, all-semiconducting nanotubes offer great promise for a variety of applications in RF and microwave electronics. It has been showed theoretically that carbon nanotube electronic devices have the potential of going into THz regime since [...]

Volume Grain Analysis in Organic Thin Film Semiconductors

Bergman D., Gentry K.P., Gredig T., California State University Long Beach, US

The grain structure of organic thin films is quantitatively studied and includes the precise grain area and volume distributions. The grain morphology affects the device performance of gas sensors and organic solar cells due to [...]