Papers – Page 72 – TechConnect Briefs

Enhanced Field Emission properties of Titanium decorated Multiwalled Carbon Nanotubes

Sharma H., Kaushik V., Shukla A.K., Vankar V.D., Indian Institute of Technology Delhi, IN

we report the role of Ti on the growth and field emission properties of multiwalled carbon nanotubes (MWCNTs), prepared by microwave plasma enhanced chemical vapour deposition technique (MPECVD). First set of studies were carried out [...]

Ab initio investigation of Graphene Based Systems

Virka N.S., Harrisonb N.M., Montanaric B., Imperial College London, UK

First-principles calculations employing the hybrid exchange functional B3LYP are used to determine the structural parameters, electronic structure and associated properties of a graphene sheet, graphane chair and graphane boat confirmations. Graphane is found to have [...]

Effect of Strain on the Energy Band Gaps of (13,0) and (15,0) Carbon Nanotubes

Dereli G., Vardar N., Eyecioglu O., Yildiz Technical University, TR

Electronic structure of (13,0) and (15,0) zig-zag single wall carbon nanotubes (SWCNTs) under uniaxial strain are studied using order N, tight binding molecular dynamic (O(N) TBMD) simulation code designed by Dereli et.al. Total energy and [...]

Synthesis and Characterization of Single Wall Carbon Nanohorns Produced by Direct Vaporization of Graphite

Pagura C., Schiavon M., Barison S., Battiston S., Consiglio Nazionale delle Ricerche, IT

A new patented process for massive production of single wall carbon nanohorn (SWCNH) is presented. Without any catalyst, the prototipe plant is able to produce 100 g/h of high purity carbon nanohorns. The direct vaporization [...]

100nm Range Short Tube Products of Nano Carbon from Solid Phase Synthesis Process Without Shortening Effort

Nguyen K.C., Tran V.V., Mai A.T.N., Bui M.C., Dang H.D., Saigon Hi Tech Park (SHTP), VN

Solid phase synthesis technique of nano carbon has reached a significant milestone in achieving short tube length in the range of 100nm. This achievement was obtained with a) specific solid carbon source (CS) having small [...]

Wafer Level Assembly of Single-Walled Carbon Nanotube (SWCNT) Arrays with Precise Positioning

Cao J., Arun A., Lister K., Acquaviva D., Bhandari J., Ionescu A.M., Ecole Polytechnique Fédérale de Lausanne, CH

A novel wafer level assembly method to fabricate SWCNT arrays with precise positioning of each individual SWCNT by ac-dielectrophoresis (DEP) is presented. Unlike the previous CNT assembly performed directly between electrode pairs, in this work, [...]

Determination of Cefixime in aqueous solution using multiwalled carbon nanotubes solid- phase extraction cartridge

Jafari M., Aghamiri F., Khaghani G.R., university of isfahan, IR

one of the most important chemical properties of carbon nanotubes is having a hydrophobic surface, and because of that many compounds and materials can be retained on the surface of these nano structures. In this [...]

Carbon Nanotubes and Grephene for Solar Cells

Li Z., Dervishi E., Saini V., Bourdo S., Biris A.S., University of Arkansas at Little Rock, US

Carbon nanotubes and graphene represent attractive materials for photovoltaic devices. Single wall carbon nanotubes (SWNTs) bear many superior properties for photovoltaic application such as a wide range of direct bandgaps matching the solar spectrum, strong [...]

Vertically Aligned Carbon Nanotube Arrays assembled on Glassy Carbon electrode

Sun J., Peking University, CN

We provide a strategy to vertically arrange single-walled carbon nanotubes on graphite electrode. The strategy is rather convenient and opens a new way to modify the graphite electrode with standing carbon nanotubes, which is criticle [...]

A Dual-Frequency Wearable MWCNT Ink-Based Spiral Microstrip Antenna

Elwi T.A., University of Arkansas at Little Rock, US

In this paper, we present a dual-frequency, square spiral microstrip patch antenna constructed from Multi-Walled Carbon Nanotubes (MWCNT) ink deposited on a thin flexible FR4 substrate using a cold printing process. The proposed antenna operates [...]