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Displaying records 21 to 30 of 60 records.
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21. Discriminating the states of matter in metallic nanoparticle transformations: What are we missing?
Topic: Nanomaterials
Published: 2/20/2013
Authors: John M Pettibone, Julien C. Gigault, Vincent A Hackley
Abstract: A limiting factor in assessing the risk of current and emerging nanomaterials in biological and environmental systems is the ability to accurately detect and characterize their size, shape and composition in broad distributions and complex media. Asy ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913009

22. Disparate effects of an O2 internal impurity on the elongation and quantum transport of gold and silver nanowires
Topic: Nanomaterials
Published: 8/21/2013
Authors: Shmuel Barzilai, Francesca M Tavazza, Lyle E Levine
Abstract: In this work we investigated the effects of an internal O2 impurity on the conductance of elongated gold and silver nanowires (NWs) using density functional theory (DFT) calculations. We found that the O2 interacts with these metallic NWs very diffe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913786

23. Dynamic light scattering investigations of nanoparticle aggregation following a light-induced pH jump
Topic: Nanomaterials
Published: 5/19/2010
Authors: Ryan Murphy, Denis Pristinski, Kalman D Migler, Jack F Douglas, Vivek M Prabhu
Abstract: We use dynamic light scattering to characterize the kinetics of nanoparticle aggregation. The aggregation process was conveniently initiated in photoacid generator (PAG) solutions where changes in the pH of the solution can be controlled by exposure ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904974

24. Effect of AlN Buffer Layer Properties on the Morphology and Polarity of GaN Nanowires Grown by Molecular Beam Epitaxy
Topic: Nanomaterials
Published: 9/8/2011
Authors: Matthew David Brubaker, Kristine A Bertness, Norman A Sanford, Albert Davydov, Igor Levin, Devin M. Rourke, Victor M. Bright
Abstract: Low temperature AlN buffer layers grown by plasma-assisted Molecular Beam Epitaxy (MBE) on Si (111) were found to significantly affect the subsequent growth morphology of GaN nanowires. The AlN buffer layers exhibited nanowire-like columnar protrusi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908715

25. Effect of elastic deformation on frictional properties of few-layer graphene
Topic: Nanomaterials
Published: 1/9/2012
Authors: Alexander Y Smolyanitsky, Jason Philip Killgore, Vinod K Tewary
Abstract: We describe the results of Brownian dynamics (BD) simulations of an AFM tip scanned on locally suspended few-layer graphene. The effects of surface compliance and sample relaxation are directly related to the observed friction force. We demonstrate t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909404

26. Effect of oxidation on surface-enhanced Raman scattering activity of silver nanoparticles: a quantitative correlation
Topic: Nanomaterials
Published: 6/6/2011
Authors: Yun Han, Robert Lupitskyy, Tseng-Ming Chou, Christopher M Stafford, Henry Du, Svetlana Sukhishvili
Abstract: The effect of silver oxidation on surface-enhanced Raman scattering (SERS) was investigated using citrate-reduced silver nanoparticles (Ag NPs) (45-50 nm in diameter) immobilized on glass substrate. Oxidation of Ag NPs was performed in controlled ozo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906745

27. Effects of surface compliance and relaxation on the frictional properties of lamellar materials
Topic: Nanomaterials
Published: 6/10/2014
Authors: Alexander Y Smolyanitsky, Shuze Zhu, Zhao Z. Deng, Teng Li, Rachel J. Cannara
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915630

28. Evaluation of Metal Oxide Nanowire Materials with Temperature-Controlled Microsensor Substrates
Topic: Nanomaterials
Published: 11/30/2012
Authors: Kurt D Benkstein, Baranidharan Raman, David L. Lahr, Stephen Semancik
Abstract: Nanomaterials are becoming increasingly important for next-generation chemical sensing devices. In particular, quasi-one-dimensional materials, such as nanowires, are attracting a great deal of interest. While early examples of nano-wire-based chemic ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907591

29. Excimer laser-based purification of single-walled carbon nanotubes
Topic: Nanomaterials
Published: 4/1/2010
Authors: Katie Hurst, Elisabeth Mansfield, Anne Dillon, John H Lehman
Abstract: Bulk purified carbon nanotube (CNT) material is essential for the realization of CNT applications including incorporating them into various composite materials. We have developed a laser-based purification technique for bulk single-walled carbon nano ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904499

30. Exposure and Fire Hazard Assessment of Nanoparticles in Fire Safe Consumer Products: Interagency Agreement Final Report
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7805
Topic: Nanomaterials
Published: 8/4/2011
Authors: Rick D Davis, Yeon S. Kim, Richard H. Harris Jr., Marc R. Nyden, Nasir M. Uddin, Treye Thomas
Abstract: An innovative technology was evaluated to generate fire and health safe soft furnishings. Nanoparticle-based thin coatings on a polyurethane foam and nonwoven barrier fabric were applied using Layer-by-layer (Lbl) assembly. This is the first report ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908275



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