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Displaying records 11 to 20 of 25 records.
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11. Origin of Universal Optical Conductivity and Optical Stacking Sequence Identification in Multilayer Graphene
Topic: Nanostructured Materials
Published: 8/6/2009
Authors: Hongki Min, Allan H. MacDonald
Abstract: We predict that the optical conductivity of normal graphene multilayers is close to {sigma}^duni^=({pi}/2) e^u2^/h per layer over a broad range of frequencies. The origin of this behavior is an emergent chiral symmetry which is present in normal N-l ...

12. Relative Photon-to-Carrier Efficiencies of Alternating Nanolayers of Zinc Phthalocyanine and C60 Multilayer Films Assessed by Time-Resolved Terahertz Spectroscopy
Topic: Nanostructured Materials
Published: 10/1/2009
Authors: Okan Esenturk, Joseph S Melinger, Paul A. Lane, Edwin J Heilweil
Abstract: Alternating multi-layer and 1:1 blended films of zinc phthalocyanine (ZnPc)and buckminsterfullerene (C60) were investigated as model active layers for solar cells by Time-Resolved Terahertz Spectroscopy (TRTS). Relative photon-to-carrier efficiencies ...

13. Resonant Microwave Absorption in Thermally Deposited Au Nanoparticle Films Near Percolation Coverage
Topic: Nanostructured Materials
Published: 6/19/2013
Authors: Jan Obrzut, Jack F Douglas, Oleg A Kirillov, Fred Sharifi, James Alexander Liddle
Abstract: We observe a resonant transition in microwave absorption in thin thermally deposited Au nanoparticle films near the geometrical percolation transition pc where the films exhibit a ,fractal‰ heterogeneous geometry. The absorption of incident microwa ...

14. Revealing the Interphase in Polymer Nanocomposites
Topic: Nanostructured Materials
Published: 3/16/2011
Authors: Mauro Zammarano, Paul Hutsell Maupin, Li Piin Sung, Jeffrey W Gilman, Douglas Matthew Fox
Abstract: Morphological characterization of polymer nanocomposites is a fundamental challenge that is complicated by multiple length scales. Here, we report a technique for high-throughput monitoring of interphase and dispersion in polymer nanocomposites based ...

15. Silicon Carbide Nanostructures: A Tight Binding Approach
Topic: Nanostructured Materials
Published: 6/28/2009
Authors: Anthony D. Patrick, Xiao Dong, Thomas C Allison, Estela Blaisten-Barojas
Abstract: A tight-binding model Hamiltonian is newly parametrized for silicon carbide based on fits to a database of energy points calculated within the density functional theory approach of the electronic energy surfaces of nanoclusters and the total en ...

16. Steering Acoustically Propelled Nanowire Motors towards Cells in a Biologically Compatible Environment using Magnetic Fields
Topic: Nanostructured Materials
Published: 12/10/2013
Authors: Suzanne Ahmed, Wei Wang, Lamar O. Mair, Robert D. Fraleigh, Sixing Li, Luz Angelica Castro, Mauricio Hoyos, Tony Jun Huang, Thomas E. Mallouk
Abstract: The recent discovery of fuel-free propulsion of nanomotors using acoustic energy has provided a new avenue for using nanomotors in biocompatible media. Crucial to the application of nanomotors in biosensing and biomedical applications is the ability ...

17. Storage Wars: How citrate capped silver nanoparticle suspensions are affected by not-so-trivial decisions
Topic: Nanostructured Materials
Published: 3/21/2014
Authors: Justin M Gorham, Anne B Rohlfing, Katrice A Lippa, Robert I. MacCuspie, Amy Hemmati, Richard D Holbrook
Abstract: A critical but often overlooked component of silver nanoparticle (AgNPs) suspensions involves their behavior following short- and long-term storage. The current study investigates the integrity of citrate-capped AgNP suspensions, nominally 20 nm in ...

18. Strong Casimir force reduction by metallic surface nanostructuring
Topic: Nanostructured Materials
Published: 9/27/2013
Authors: Francesco Intravaia, Stefan T. Koev, Il Woong Jung, Albert A. Talin, Paul S Davids, Ricardo Decca, Vladimir A Aksyuk, Diego A. R. Dalvit, Daniel Lopez
Abstract: The Casimir force is a quantum-mechanical interaction arising from vacuum fluctuations of the electromagnetic (EM) field and is technologically significant in micro- and nanomechanical systems. Despite rapid progress in nanophotonics, the goal of e ...

19. Structure stability and electronic transport of gold nanowires on BeO (0001) surface
Topic: Nanostructured Materials
Published: 7/12/2013
Authors: Shmuel Barzilai, Francesca M Tavazza, Lyle E Levine
Abstract: Gold nanowire chains are considered a good candidate for nanoelectronics devices since they exhibit remarkable structural and electrical properties. For practical engineering devices, -wurtzite BeO may be a useful platform for supporting the ...

20. Tin Oxide Nanowire Sensor with Integrated Temperature and Gate Control for Multi-Gas Recognition
Topic: Nanostructured Materials
Published: 3/7/2012
Authors: Eric N. (Eric) Dattoli, Albert Davydov, Kurt D Benkstein
Abstract: The selectivity of a chemiresistive gas sensor comprising an aligned array of single-crystalline tin oxide nanowires (NWs) is shown to be greatly enhanced by combined temperature and gate voltage modulation. This dual modulation was effected by utili ...

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