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Topic Area: Nanostructured Materials

Displaying records 21 to 30 of 39 records.
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21. Facile One-Pot Synthesis of Metal-Semiconductor Hybrid Nanocrystals via Chemical Transformation: The Case of Cu-CuxS Heterodimers and Hetero-Oligomers
Topic: Nanostructured Materials
Published: 3/18/2010
Authors: Yonglin Liu, Angela R Hight Walker
Abstract: Metal-semiconductor hybrid nanocrystals (HNCs) hold great potential in the fields of photocatalysis, biomedical imaging, and anticancer nanomedicine. However, their chemical synthetic procedures remain complex and challenging. Here, we apply chemical ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903039

22. Nanostructured Solar Cells Have Improved Charge Collection and Self-Cleaning Properties
Topic: Nanostructured Materials
Published: 2/8/2010
Author: Fred Sharifi
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904960

23. Microsensors in Dynamic Backgrounds: Toward Real-Time Breath Monitoring
Topic: Nanostructured Materials
Published: 1/15/2010
Authors: Kurt D Benkstein, Baranidharan Raman, Christopher B Montgomery, C Martinez, Stephen Semancik
Abstract: We evaluated MEMS microsensor array with chemi-resistive elements for use as a non-invasive clinical diagnostic tool to detect the presence or absence of trace amounts of disease biomarkers in simulated breath samples. The microsensor environment was ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901207

24. Effects of magnetism and electric field on the energy gap of bilayer graphene nanoflakes
Topic: Nanostructured Materials
Published: 1/13/2010
Author: Hongki Min
Abstract: We study the effect of magnetism and perpendicular external electric field strengths on the energy gap of length confined bilayer graphene nanoribbons (or nanobars) using a first principles density functional electronic structure method and a semi-lo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903804

25. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902140

26. Optical Properties of Rod-like Metallic Nanostructures: Insight from Theory and Experiment
Topic: Nanostructured Materials
Published: 9/3/2009
Authors: Jinsong Duan, Kyoungweon Park, Robert I. MacCuspie, Richard A Vaia, Ruth Pachter
Abstract: In this work, we combined synthesis of metal Au and Au-Ag core-shell NRs, of high-purity and for a broad range of NR aspect ratios, with theoretical prediction, in order to gain an understanding of the optical response. Self-assembled NRs were also ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902067

27. Large-Area Chemically Modified Graphene Films: Electrophoretic Deposition and Characterization by Soft X-ray Absorption Spectroscopy
Topic: Nanostructured Materials
Published: 8/25/2009
Authors: Daniel A Fischer, V. J. Lee, Luisa Whittaker, Cherno Jaye, K. Baroudi, S Banerjee
Abstract: A facile, rapid, and scalable electrophoretic deposition approach is developed for the fabrication of large-area chemically derived graphene films on conductive substrates based on the electrophoretic deposition of graphene oxide and reduced graphene ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902943

28. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902107

29. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904026

30. Nanoparticle assembly, DNA provides control
Topic: Nanostructured Materials
Published: 5/1/2009
Authors: Vivek M Prabhu, Steven D Hudson
Abstract: No abstract this is a Nature Materials News and Views (less than 800 word) article.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902344



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