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You searched on: Author: yvonne gerbig Sorted by: date

Displaying records 1 to 10 of 17 records.
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1. In situ observations of Berkovich indentation induced phase transitions in crystalline silicon films
Published: 4/19/2016
Authors: Yvonne Beatrice Gerbig, Chris A Michaels, Robert Francis Cook
Abstract: The pressure induced phase transitions of crystalline Si films was studied in situ under a Berkovich probe using the Raman spectroscopy-enhanced instrumented indentation technique. The observations suggested strain and time as important parameters in ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=920074

2. Assessing Electron Backscattered Diffraction and Confocal Raman Microscopy Strain Mapping Using Wedge-indented Si
Published: 2/17/2016
Authors: Lawrence H Friedman, Mark D Vaudin, Stephan J Stranick, Gheorghe Stan, Yvonne Beatrice Gerbig, William A Osborn, Robert Francis Cook
Abstract: The accuracy of electron backscattered diffraction (EBSD) and confocal Raman microscopy (CRM) for small-scale strain mapping are assessed using the multi-axial strain field surrounding a wedge indentation in Si as a test vehicle. The strain field is ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=919078

3. In situ spectroscopic study of the plastic deformation of amorphous silicon under non-hydrostatic conditions
Published: 12/17/2015
Authors: Yvonne Beatrice Gerbig, Chris A Michaels, Robert Francis Cook, Jodie E. Bradby
Abstract: Indentation-induced plastic deformation of amorphous silicon (a-Si) thin films was studied by in situ Raman imaging of the deformed contact region of an indented sample, employing a Raman spectroscopy-enhanced instrumented indentation technique (IIT) ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918450

4. In situ observation of the spatial distribution of crystalline phases during pressure-induced transformations of indented silicon thin films
Published: 2/14/2015
Authors: Yvonne Beatrice Gerbig, Chris A Michaels, Robert Francis Cook
Abstract: Indentation-induced phase transformation processes were studied by in situ Raman imaging of the deformed contact region of silicon, employing a Raman spectroscopy-enhanced instrumented indentation technique. This is, to our knowledge, the first seque ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916253

5. Raman spectroscopy-enhanced IIT: In situ analysis of mechanically stressed polycrystalline Si thin films
Published: 7/8/2014
Authors: Yvonne Beatrice Gerbig, Chris A Michaels, Robert Francis Cook
Abstract: Exposed to mechanical stress, semiconductor materials may phase transform, resulting in changes of crystallographic structure and material properties, rather than deform by plastic flow. As a consequence, prediction of the state and distribution of s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915665

6. Accurate Spring Constant Calibration for very Stiff Atomic Force Microscopy Cantilevers
Published: 11/26/2013
Authors: Scott Grutzik, Richard Swift Gates, Yvonne Beatrice Gerbig, Douglas T Smith, Robert Francis Cook, Alan Zehnder
Abstract: There are many atomic force microscopy (AFM) applications that rely on quantifying the force between the AFM cantilever tip and the sample. The AFM does not explicitly measure force, however, so in such cases knowledge of the cantilever stiffness ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912481

7. Indentation device for in situ Raman spectroscopic and optical studies
Published: 12/12/2012
Authors: Yvonne Beatrice Gerbig, Chris A Michaels, Aaron M Forster, John W Hettenhouser, Walter Eric Byrd, Dylan J. Morris, Robert Francis Cook
Abstract: Instrumented indentation is a widely used technique to study the mechanical behavior of materials at small length scales and thus has been exploited in particular for metals, ceramics, glasses, and polymers. Mechanical tests of bulk materials, micros ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911470

8. THE ROLE OF TOOTH ENAMEL MECHANICAL PROPERTIES IN PRIMATE DIETARY ADAPTATION
Published: 6/27/2012
Authors: Paul Constantino, James J. Lee, Yvonne Beatrice Gerbig, Adam Hartstone-Rose, Mauricio Talebi, Brian Ronald Lawn, Peter Lucas
Abstract: Primate teeth adapt to the physical properties of foods in a variety of ways including changes in occlusal morphology, enamel thickness, and overall size. We conducted a comparative study of extant primates to examine whether their teeth also adap ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907407

9. High Confidence Level Calibration for AFM Based Fracture Testing of Nanobeams
Published: 6/11/2012
Authors: Scott Grutzik, Richard Swift Gates, Yvonne Beatrice Gerbig, Robert Francis Cook, Melissa Hines, Alan Zehnder
Abstract: When designing micro- or nanoelectromechanical systems, (MEMS and NEMS), it is important to consider whether structural elements will withstand loads experienced during operation. Fracture behavior at length scales present in MEMS and NEMS is much di ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911026

10. In situ observation of the indentation-induced phase transformation of silicon thin films
Published: 3/5/2012
Authors: Yvonne Beatrice Gerbig, Chris A Michaels, Aaron M Forster, Robert Francis Cook
Abstract: Indentation-induced phase transformation processes were studied by in situ Raman microspectroscopy of the deformed contact region of silicon on sapphire samples during contact loading and unloading. During loading, the formation of Si-II and another ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910047



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