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Articles 1 - 6 of 6
Full-Text Articles in Physical Sciences and Mathematics
Phase Diagrams Of The Metallic Zigzag Carbon Nanotube, J E. Bunder, Hsiu-Hau Lin
Phase Diagrams Of The Metallic Zigzag Carbon Nanotube, J E. Bunder, Hsiu-Hau Lin
Faculty of Informatics - Papers (Archive)
We investigate a metallic zigzag carbon nanotube by means of a Hubbard model, which includes both on-site and nearest-neighbor interactions. Assuming weak interactions, a renormalization group analysis of the equivalent two-leg ladder followed by bosonization and refermionization results in a Gross-Neveu model with an enlarged symmetry relative to the original Hamiltonian. For the undoped case the symmetry of the Gross-Neveu model is SO_8_, but for the doped case the particle-hole symmetry is broken and the symmetry reduces to SO_6_. Four ground-state phases are found in the undoped carbon nanotube with repulsive interactions, a d-wave Mott insulator, an s-wave Mott insulator, …
Mechanics Of Fullerene-Carbon Nanotube Bundle Oscillators, James M. Hill, Ngamta Thamwattana, Duangkamon Baowan, Barry J. Cox
Mechanics Of Fullerene-Carbon Nanotube Bundle Oscillators, James M. Hill, Ngamta Thamwattana, Duangkamon Baowan, Barry J. Cox
Faculty of Informatics - Papers (Archive)
Carbon nanostructures, such as nanotubes and fullerenes, are of considerableinterest to a wide range of research communities. Owing to their unique properties, a numberof applications involving these structures have been proposed, one of which is the so-callednano-scaled oscillators, for which the resultant oscillatory frequencies are in the gigahertzrange. The phenomena of the gigahertz oscillations have also led to the possible creation offuture devices, such as ultra-fast optical filters and ultra-sensitive nano-antennae. In thispaper we present recent developments in this area and review the authors recent work,where we investigate the mechanics of a new type of gigahertz oscillator comprising afullerene C60 …
Direct Ascorbic Acid Detection With Ferritin Immobilized On Single-Walled Carbon Nanotubes, Chonlada Dechakiatkrai, Jun Chen, Carol M. Lynam, Kwang Min Shin, Seon Jeong Kim, Sukon Phanichphant, Gordon G. Wallace
Direct Ascorbic Acid Detection With Ferritin Immobilized On Single-Walled Carbon Nanotubes, Chonlada Dechakiatkrai, Jun Chen, Carol M. Lynam, Kwang Min Shin, Seon Jeong Kim, Sukon Phanichphant, Gordon G. Wallace
Faculty of Science - Papers (Archive)
Ferritin protein was noncovalently immobilized onto single-walled carbon nanotubes (SWNTs). This SWNT/ferritin composite was characterized using cyclic voltammetry, UV-visible spectroscopy, Raman spectroscopy, and high-resolution transmission electron microscopy. The use of the SWNT/ferritin film as an amperometric biosensor was demonstrated by sensing ascorbic acid in phosphate-buffered saline solution with a sensitivity of 767 uAmg. It demonstrated that ferritin protein bound to SWNTs enhances the oxidation reaction of ascorbic acid over 11-fold.
Global Airs And Mopitt Co Measurements: Validation, Comparison, And Links To Biomass Burning Variations And Carbon Cycle, Leonid N. Yurganov, W. Wallace Mcmillan, Anatoly V. Dzhola, Evgeny I. Grechko, Nicholas B. Jones, Guido R. Van Der Werf
Global Airs And Mopitt Co Measurements: Validation, Comparison, And Links To Biomass Burning Variations And Carbon Cycle, Leonid N. Yurganov, W. Wallace Mcmillan, Anatoly V. Dzhola, Evgeny I. Grechko, Nicholas B. Jones, Guido R. Van Der Werf
Faculty of Science - Papers (Archive)
New results of CO global total column measurements using the Atmospheric Infrared Sounder (AIRS) aboard the Aqua satellite in comparison with Measurements of Pollution in the Troposphere (MOPITT) sensor aboard the Terra satellite are presented. Both data sets are validated using ground-based total column measurements in Russia and Australia. A quality parameter based on the Profile Percent A Priori values from the standard MOPITT product is introduced. AIRS data (version 4) for biomass burning events are in agreement or lower than both MOPITT and ground measurements, but CO bursts can be seen by AIRS in most cases. For the cases …
Inkjet Printing: A Viable Tool For Processing Polymer Carbon Nanotube Composites, Marc In Het Panhuis, William R. Small
Inkjet Printing: A Viable Tool For Processing Polymer Carbon Nanotube Composites, Marc In Het Panhuis, William R. Small
Faculty of Science - Papers (Archive)
The inkjet processing of water dispersable polymer carbon nanotube composite materials is reported. Single printed layers displayed good optical transparency, sheet resistance, and conductivity. It is demonstrated that an alcohol sensor based on a single printed layer of polymer carbon nanotube composite could operate at a lower voltage compared to a sensor based on a single printed layer of the polymer.
Controlled Deposition Of Polymer Carbon Nanotube Composites Through Inkjet Printing, William Small, Fatemeh Masdarolomoor, Gordon G. Wallace, Marc In Het Panhuis
Controlled Deposition Of Polymer Carbon Nanotube Composites Through Inkjet Printing, William Small, Fatemeh Masdarolomoor, Gordon G. Wallace, Marc In Het Panhuis
Faculty of Science - Papers (Archive)
The controlled deposition of polyaniline carbon nanotube composites by inkjet printing is reported. It is demonstrated that the sheet resistance and transmittance can be expressed in amount of composite and MWNT material deposited. The most efficient way for improving the sheet resistance while keeping the cost in optical transparency to a minimum is by increasing the total amount of material deposited, rather than increasing MWNT loading fraction.