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Author: robert cook

Displaying records 21 to 30 of 51 records.
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21. Measurement of residual stress field anisotropy at indentations in silicon
Published: 6/23/2010
Authors: Yvonne Beatrice Gerbig, Stephan J Stranick, Robert Francis Cook
Abstract: The residual stress field around spherical indentations on single crystal silicon (Si) of different crystallographic orientation is mapped by confocal Raman microscopy. All orientations exhibit an anisotropic stress pattern with an orientation spec ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905445

22. Mechanical properties of one-dimensional nanostructures
Published: 5/23/2010
Authors: Gheorghe Stan, Robert Francis Cook
Abstract: The elastic mechanical properties of one-dimensional nanostructures are considered, with an emphasis on the use of contact-resonance atomic force microscopy methods to determine elastic moduli. Various methods used to determine elastic moduli of one- ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902063

23. Elastic, adhesive, and charge transport properties of a metal-molecule-metal junction: the role of molecular orientation, order, and coverage
Published: 5/20/2010
Authors: Frank W DelRio, Kristen L Steffens, Cherno Jaye, Daniel A Fischer, Robert Francis Cook
Abstract: The elastic, adhesive, and charge transport properties of a metal-molecule-metal junction are studied via conducting-probe atomic force microscopy (AFM) and correlated with molecular structure by near edge x-ray absorption fine structure (NEXAFS) spe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903177

24. Strength distribution of single-crystal silicon theta-like specimens
Published: 5/18/2010
Authors: Michael S. Gaither, Frank W DelRio, Richard Swift Gates, Edwin R. Fuller, Robert Francis Cook
Abstract: A new test specimen has been developed for micro-scale tensile strength measurements, allowing direct assessment of surface effects on strength. Specimens were formed by deep reactive ion etching, tested with instrumented indentation, and test resul ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904988

25. Probing the Nanoscale
Published: 4/23/2010
Author: Robert Francis Cook
Abstract: Nanoscale probes can now measure all manner of nanomechanical properties, opening up opportunities for new science and new devices.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905145

26. Compressive stress effect on the radial elastic modulus of oxidized Si nanowires
Published: 3/23/2010
Authors: Gheorghe Stan, Sergiy Krylyuk, Albert Davydov, Robert Francis Cook
Abstract: Detailed understanding and optimal control of the properties of Si nanowires are essential steps in developing Si nanoscale circuitry. In this work, we have investigated mechanical properties of as-grown and oxidized Si nanowires as a function of the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904727

27. Theta-like specimen to determine tensile strength at the micro-scale
Published: 3/10/2010
Authors: Michael S. Gaither, Frank W DelRio, Richard Swift Gates, Edwin R. Fuller, Robert Francis Cook
Abstract: Micro- and nano-electromechanical systems are typically formed via lithographic and etching processes that leave residual surface features, stresses, and chemistry that ultimately control component strength and device reliability. Here, we describe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904555

28. The Nanomechanical Properties of Thin Film of Type I Collagen Fibrils
Published: 3/2/2010
Authors: Koo-Hyun Chung, Kiran Bhadriraju, Tighe Spurlin, Robert Francis Cook, Anne L Plant
Abstract: Cells sense and respond to the mechanical properties of the substrate to which they adhere. Matrices composed of collagen have been an important experimental system to study cell responses to the stiffness of the extracellular matrix. We had previo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824709

29. Nanomechanical Measurements and Tools
Published: 2/23/2010
Author: Robert Francis Cook
Abstract: Nanotechnology provides great opportunities for the development of advanced devices with enormous quality-of-life and economic benefits, with applications ranging from biomedical implantable actuators to environmental toxin detectors to infrastructur ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904862

30. Size Measurement of Nanoparticles using Atomic Force Microscopy
Published: 10/1/2009
Authors: Jaroslaw Grobelny, Frank W DelRio, Pradeep Narayanan Namboodiri, Doo-In Kim, Vincent A Hackley, Robert Francis Cook
Abstract: In this assay protocol, procedures for dispersing gold nanoparticles on various surfaces such that they are suitable for imaging and height measurement via intermittent contact mode AFM are first described. The procedures for AFM calibration and ope ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854085



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