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You searched on: Topic Area: Nanomaterials Sorted by: title

Displaying records 21 to 30 of 83 records.
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21. Determination of nanoparticle surface coatings and nanoparticle Purity using microscale thermogravimetric analysis analysis
Topic: Nanomaterials
Published: 1/8/2014
Authors: Elisabeth Mansfield, Christopher Michael Poling, Jenifer L. (Jenifer) Blacklock, Katherine M Tyner
Abstract: The use of nanoparticles in some applications (i.e., nanomedical, nanofiltration or nanoelectronic) requires small-scale samples with well-known purities and composition. In addition, when nanoparticles are introduced into complex environments ( ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914528

22. Dielectric characterization by microwave cavity perturbation corrected for non-uniform fields
Topic: Nanomaterials
Published: 7/23/2014
Authors: Nathan D Orloff, Jan Obrzut, Christian J Long, Thomas F. Lam, James C Booth, David R Novotny, James Alexander Liddle, Pavel Kabos
Abstract: The non-uniform fields that occur due to the slot in the cavity through which the sample is inserted and those due to the sample geometry itself decrease the accuracy of dielectric characterization by cavity perturbation at microwave frequencies. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915011

23. Differentiation and characterization of isotopically modified silver nanoparticles in aqueous media using asymmetric-flow field flow fractionation coupled to optical detection and mass spectrometry
Topic: Nanomaterials
Published: 12/10/2012
Authors: Julien C. Gigault, Vincent A Hackley
Abstract: The principal objective of this work was to develop and demonstrate a new methodology for silver nanoparticle (AgNP) detection and characterization based on asymmetric-flow field flow fractionation (A4F) coupled to multiple detectors and using stable ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912174

24. Direct Observation of Hydrogen Spillover in Ni-Loaded Pr-Doped Ceria
Topic: Nanomaterials
Published: 1/17/2012
Authors: Vaneet Sharma, Peter A. Crozier, Renu Sharma, James B. Adams
Abstract: Hydrogen-spillover in Ni-loaded Pr-doped ceria (PDC) was directly observed using an environmental transmission electron microscope (ETEM). Localized reduction of ceria in a H2 atmosphere was observed and attributed to gas-Ni-ceria interactions at the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908886

25. Directed 2D-to-3D pattern transfer method for controlled fabrication of topologically complex three- dimensional nanostructures in silicon
Topic: Nanomaterials
Published: 2/1/2011
Authors: Konrad Rykaczewski, Owen J. Hildreth, Ching P. Wong, Andrei G. Fedorov, John Henry j Scott
Abstract: A process allowing for control over the 3D motion of catalyst nanostructures during Metal-assisted Chemical Etching by their local pinning prior to etching is developed. Topologically complex 3D structures that are partially located within the et ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906590

26. 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

27. 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

28. 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

29. 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

30. 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



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