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Displaying records 21 to 30 of 71 records.
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21. 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 ...

22. Graphene Epitaxial Growth on SiC(0001) for Resistance Standards
Topic: Nanomaterials
Published: 6/3/2013
Authors: Mariano A. Real, Eric Lass, Fan-Hung H. 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 ...

23. ,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 ...

24. 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 ...

25. 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 ...

26. 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 ...

27. A three-dimensional, polarization-insensitive superconducting nanowire avalanche photodetector
Topic: Nanomaterials
Published: 12/20/2012
Authors: Varun Boehm Verma, Francesco F. Marsili, Adriana Eleni Lita, Richard P Mirin, Sae Woo Nam
Abstract: Single-photon detectors are an essential tool for a wide range of applications in quantum information, quantum communications, and quantum optics. Over the past decade, superconducting nanowire single-photon detectors (SNSPDs) have become promising a ...

28. 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 ...

29. High-energy Ultra-Small Angle X-ray Scattering Instrument at the Advanced Photon Source
Topic: Nanomaterials
Published: 12/1/2012
Authors: Andrew John Allen, Lyle E Levine, Fan Zhang, Gabrielle Gibbs Long, Jan Ilavsky, Pete R. Jemian
Abstract: This paper reports recent tests performed on the Bonse-Hart-type ultra-small angle X-ray scattering (USAXS) instrument at the Advanced Photon Source with higher-order reflection optics , Si (440) instead of Si (220) , and with X-ray energies greate ...

30. 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 ...

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