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Topic Area: Metals
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Displaying records 21 to 30 of 59 records.
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21. Effect of oxidation on surface-enhanced Raman scattering activity of silver nanoparticles: a quantitative correlation
Topic: Metals
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

22. Electron Transport in Gold Nanowires: Stable 1-, 2- and 3-Dimensional Atomic Structures and Non-Integer Conduction States
Topic: Metals
Published: 9/14/2011
Authors: Francesca M Tavazza, Douglas T Smith, Lyle E Levine, Jon Robert Pratt, Anne Marie Chaka
Abstract: Experimental conductivity measurements made during highly stable tensile deformation of Au nanowires show a rich variety of behaviors, including non-integer quantum conductance plateaus, transitions and slopes. Using tight binding conductance cal ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906808

23. Estimation of Process Stability in the MAG Welding Process by Monitoring the Welding Parameters
Topic: Metals
Published: 11/1/2001
Author: Thomas Allen Siewert
Abstract: This paper presents the distribution of the main welding parameters (welding voltage and welding current) for semiautomatic arc welding with the metal active gas (MAG) process, using both flux- cored and solid electrodes. Two different shielding fas ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851229

24. Finite-element analysis and experimental investigation of probe shape effect on initial plastic yield
Topic: Metals
Published: 3/3/2009
Authors: Li Ma, Dylan Morris, Stefhanni Jennerjohn, David Bahr, Lyle E Levine
Abstract: Sudden displacement excursions during load-controlled nanoindentation of relatively dislocation-free surfaces of metals are frequently associated with dislocation nucleation, multiplication, and propagation. Insight into the nanomechanical origins of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854131

25. Formic acid oxidation on Pt_{100-x}Pb_{x} thin films electrodeposited on Au
Topic: Metals
Published: 4/4/2011
Authors: Sun M. Hwang, John E Bonevich, Jae Jeong Kim, Thomas P Moffat
Abstract: Electrocatalytic formic acid oxidation is examined on electrodeposited Pt_{100-x}Pb_{x} thin films grown on textured Au(111). Metastable fcc Pb_{100-x}Pt_{x} (0 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907874

26. Fracture Toughness through a Welded Pipeline Section - Crack Tip Opening Angle Criterion
Topic: Metals
Published: 4/23/2007
Authors: Philippe P. Darcis, Christopher N McCowan, Elizabeth S Drexler, Joseph David McColskey, Avigdor Shtechman, Thomas Allen Siewert
Abstract: The increasing demand for natural gas as an alternative energy source implies continued growth of gas pipeline installations. This trend compels the natural gas transmission industry to consider the construction of larger-diameter, higher-pressure pi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50531

27. Frustrated magnetization reversal in Co/Pt multilayer films
Topic: Metals
Published: 7/13/2009
Authors: Joseph E. Davies, O Hellwig, Eric E. Fullerton, M. Winklhofer, Robert D Shull, Kai Liu
Abstract: The magnetization reversal behavior in Co/Pt multilayers with perpendicular anisotropy are studied by the first order reversal curve (FORC) method. In addition to the previously observed three stage reversal process where domains first nucleate, the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854449

28. HYDROGEN PIPELINE RESEARCH AT NIST
Topic: Metals
Published: 3/31/2008
Authors: Thomas Allen Siewert, Joseph David McColskey, Angelique N Lasseigne
Abstract: In 2007, the National Institute of Standards and Technology greatly expanded its efforts in support of the use of hydrogen as a fuel.   Various NIST divisions have started projects on measurement needs in the areas of flow rates, storage, mater ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853598

29. High Strain Rate Tissue Simulant Measurements Using digital Image Correlation
Topic: Metals
Published: 6/1/2009
Authors: Steven P Mates, Richard L. Rhorer, Richard Everett, Kirth Simmonds, Amit Bagchi
Abstract: Measuring the response of soft materials to high strain rate deformation is extremely challenging because of the difficulty of achieving dynamic equilibrium during high strain rate mechanical testing such as Kolsky bar testing. Digital image correlat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902304

30. Identifying the Dynamic Compressive Stiffness of a Prospective Biomimetic Elastomer by an Inverse Method
Topic: Metals
Published: 5/14/2012
Authors: Steven P Mates, Aaron M Forster, Donald Hunston, Richard Everett, Kirth Simmonds, Amit Bagchi
Abstract: Elastomeric materials that mimic real soft human tissues are sought to provide realistic experimental devices to simulate the human body‰s response to concussive loading so that better protective equipment can be developed. Tissue injury occurs under ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909134



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