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Topic Area: Nanomaterials

Displaying records 11 to 20 of 152 records.
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11. 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

12. Temperature-Programmed Electrospray-Differential Mobility Analysis for Characterization of Ligated Nanoparticles in Complex Media
Topic: Nanomaterials
Published: 8/12/2013
Authors: De-Hao D. Tsai, Frank W DelRio, John M Pettibone, Pin Ann Lin, Jiaojie Tan, Michael Russel Zachariah, Vincent A Hackley
Abstract: In this study, an electrospray-differential mobility analyzer (ES-DMA) was operated with an aerosol flow-mode, temperature-programmed approach to enhance its ability to characterize the particle size distributions (PSDs) of nanoscale particles (NPs) ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913860

13. Ab initio study of the mechanical and the transport properties of pure and contaminated silver nanowires
Topic: Nanomaterials
Published: 7/12/2013
Authors: Shmuel Barzilai, Francesca M Tavazza, Lyle E Levine
Abstract: The conductance and mechanical properties of pure and contaminated silver nanowires were studied using density functional theory (DFT) calculations. Several nanowires containing O2 on their surface were elongated along two different directions. All o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913340

14. Graphene Epitaxial Growth on SiC(0001) for Resistance Standards
Topic: Nanomaterials
Published: 6/3/2013
Authors: Mariano A. Real, Eric Lass, Fan-Hung Liu, Tian T. Shen, George R Jones, Johannes A Soons, David B Newell, Albert Davydov, Randolph E Elmquist
Abstract: A well-controlled technique for high-temperature epitaxial growth on 6H-SiC(0001) substrates is shown to allow development of monolayer graphene that exhibits promise for precise metrological applications. Face-to-face (FTF) and face-to-graphite (FTG ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911731

15. ,Real-worldŠ precision, bias, and between-laboratory variation for surface area measurement of a titanium dioxide nanomaterial in powder form
Topic: Nanomaterials
Published: 6/1/2013
Authors: Vincent A Hackley, Aleksandr B. Stefaniak
Abstract: Accurate characterization of nanomaterial properties is a critical component of any nanotoxicology testing strategy. Data that describes the performance of various laboratories to measure the characteristics of the same nanomaterial is scarce. We c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912937

16. Gradient Nanofiber Scaffold Libraries for Screening Cell Response to Poly(e-caprolactone)-Calcium Phosphate Composites
Topic: Nanomaterials
Published: 3/1/2013
Authors: Carl George Simon Jr, Limin Sun, Laurence Chung Lung Chow, William Miles, Christopher K. Tison, Kaushik Chatterjee, Marian F Young, Vinoy Thomas, Murugan Ramalingam
Abstract: A 2-spinnerette approach has been developed for fabricating nanofiber scaffold gradients for use as 1) scaffold libraries for screening the effect of nanofiber properties on cell response and 2) templates for generating graded tissue interfaces. Alt ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906818

17. 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

18. The effect of internal impurities on the mechanical and conductance properties of gold nanowires during elongation
Topic: Nanomaterials
Published: 1/24/2013
Authors: Shmuel Barzilai, Francesca M Tavazza, Lyle E Levine
Abstract: The conductance and mechanical properties of contaminated gold nanowires were studied using first principle calculations. Nanowires containing internal impurities of H2O or O2 were elongated along two different directions. It was found that both imp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912083

19. Real-Time Size Discrimination and Elemental Analysis of Gold Nanoparticles using ES-DMA coupled to ICP-MS
Topic: Nanomaterials
Published: 1/22/2013
Authors: Sherrie R. Elzey, De-Hao D. Tsai, Lee Lijian Yu, Michael R Winchester, Michael E Kelley, Vincent A Hackley
Abstract: We report the development of a hyphenated instrument with the capacity to quantitatively characterize aqueous suspended gold nanoparticles (AuNPs) based on a combination of gas-phase size separation, particle counting, and elemental analysis. A custo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912171

20. Measurement of Scattering and Absorption Cross Sections of Microspheres for Wavelengths between 240 nm and 800 nm
Series: Journal of Research (NIST JRES)
Report Number: 118.001
Topic: Nanomaterials
Published: 1/10/2013
Authors: Lili Wang, Steven J Choquette, Adolfas Kastytis Gaigalas
Abstract: A commercial spectrometer with a 150 mm integrating sphere (IS) detector was used to measure the scattering and absorption cross sections of polystyrene monodisperse microspheres suspended in water. Absorption measurements were performed with the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909635



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