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Author: gordon shaw

Displaying records 11 to 20 of 31 records.
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11. A New Microdevice for SI-Traceable Forces in Atomic Force Microscopy
Published: 6/2/2008
Authors: Gregory W Vogl, Jason John Gorman, Gordon Allan Shaw, Jon Robert Pratt
Abstract: A new self-excited micro-oscillator is proposed as a velocity standard for dissemination of nanoNewton-level forces that are traceable to the International System of Units (SI). The microfabricated oscillator is top-coated with magnetic thin films an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824627

12. Reducing Thermal Noise in Molecular Force Spectroscopy
Published: 6/2/2008
Author: Gordon Allan Shaw
Abstract: Molecular force spectroscopy is the practice of testing the mechanical properties of single molecules.  The precision determination of these properties requires an instrument capable of piconewton-level force measurement.  The atomic force ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824638

13. A New Oscillator for SI-Traceable Measurements in Atomic Force Microscopy
Published: 6/1/2008
Authors: Gregory W Vogl, Jason John Gorman, Gordon Allan Shaw, Jon Robert Pratt
Abstract: See attached.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824441

14. A New Oscillator for SI-Traceable Measurements in Atomic Force Microscopy
Published: 5/29/2008
Authors: Gregory W Vogl, Jason John Gorman, Gordon Allan Shaw, Jon Robert Pratt
Abstract: See attached
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824439

15. Spring constant calibration of AFM cantilevers with a piezosensor transfer standard
Published: 9/24/2007
Authors: Eric Langlois, Gordon Allan Shaw, John A Kramar, Jon Robert Pratt, Donna C. Hurley
Abstract: We describe a method to calibrate the spring constants of cantilevers for atomic force microscopy (AFM). The method makes use of a piezosensor comprised of a piezoresistive cantilever and  accompanying electronics. The piezosensor was calibrated ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824626

16. Direct  Electrostatic Calibration of Hybrid Sensors for Small Force Measurement
Published: 6/4/2007
Authors: Koo-Hyun Chung, Gordon Allan Shaw, Jon Robert Pratt
Abstract: The measurement of forces from piconewtons to millinewtons is an area of interest from both an applied and pure research standpoint, however creating a link between small forces and the International System of Units (SI) has been difficult. In this w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822725

17. Focused Ion Beam Manufacturing Methods for Nickel-Titanium Shape-Memory Alloy Thin Films
Published: 6/4/2007
Authors: Gordon Allan Shaw, Koo-Hyun Chung, Bin Ming, Andras Vladar
Abstract: Nickel-titanium shape-memory alloy is an interesting and technologically relevant material that can recover large amounts of mechanical strain through a thermally-activated phase transformation. Because of is unusual properties, it has been used wide ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824622

18. Traceable Micro-Force Sensor for Instrumented Indentation Calibration
Published: 4/10/2007
Authors: Douglas T Smith, Gordon Allan Shaw, R M Seugling, D Xiang, Jon Robert Pratt
Abstract: Instrumented indentation testing (IIT), commonly referred to as nanoindentation when small forces are used, is a popular technique for determining the mechanical properties of small volumes of material. Sample preparation is relatively easy, usuall ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824624

19. A Piezoresistive Cantilever Force Sensor for Direct AFM Force Calibration
Published: 4/8/2007
Authors: Jon Robert Pratt, John A Kramar, Gordon Allan Shaw, Douglas T Smith, John M Moreland
Abstract: We describe the design, fabrication, and calibration testing of a new piezoresistive cantilever force sensor suitable for the force calibration of atomic force microscopes in a range between tens of nanonewtons to hundreds of micronewtons. The sens ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822731

20. The Stiffness of Collagen Fibrils Influences Vascular Smooth Muscle Cell Phenotype
Published: 3/1/2007
Authors: Dennis P. McDaniel, Gordon Allan Shaw, John T Elliott, Kiran Bhadriraju, Curtis W Meuse, Koo-Hyun Chung, Anne L Plant
Abstract: Cells receive signals from the extracellular matrix through receptor-dependent interactions, but they are also influenced by the mechanical properties of the matrix. While bulk properties of substrates have been shown to effect cell behavior, we sho ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830514



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