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Author: stephan stranick

Displaying records 11 to 20 of 36 records.
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11. Sounds of Atoms: Life in Science
Published: 10/10/2008
Author: Stephan J Stranick
Abstract: Early in setting up our nanoscience laboratory at Penn State, we were frustrated because we could not peer into the tunneling junctions of our scanning tunneling microscopes (STMs) to see what the atoms were doing. We were particularly vexed wh ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832426

12. Programmable Vector Point-Spread Function Engineering
Published: 4/1/2006
Authors: M R. Beversluis, L Novotny, Stephan J Stranick
Abstract: We use a nematic liquid crystal spatial light modulator (SLM) to control the vector point spread function of a microscope objective by manipulating the pupil field polarization. In combination with an achromatic quarter-wave plate, the SLM acts as a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831368

13. Chemical Imaging of Heterogeneous Polymeric Materials With Near-Field IR Microscopy
Published: 4/1/2005
Authors: Chris A Michaels, D B Chase, Stephan J Stranick
Abstract: The development of techniques to probe spatial variations in chemical composition on the nanoscale continues to be an important area of research in the characterization of polymeric materials. Recent efforts have focused on the development and chara ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831470

14. Horizontal Growth and In Situ Assembly of Oriented ZnO Nanowires
Published: 3/13/2005
Authors: Babak Nikoobakht, Chris A Michaels, Mark D Vaudin, Stephan J Stranick
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854241

15. Horizontal Growth and In Situ Assembly of Oriented Zinc Oxide Nanowires
Published: 10/1/2004
Authors: Babak Nikoobakht, Chris A Michaels, Stephan J Stranick, Mark D Vaudin
Abstract: The positioning and directed assembly of semiconductor nanowires (NWs) is of considerable current interest for bottom-up approaches to the engineering of intricate structures from nanoscale building blocks. We report a horizontal growth mode for ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831361

16. Template Fabrication of Protein-Functionalized Gold-Polypyrrole-Gold Segmented Nanowires
Published: 9/1/2004
Authors: R M Hernandez, Lee J Richter, Stephen Semancik, Stephan J Stranick, Thomas E. Mallouk
Abstract: Gold nanowires containing protein-modified poly(pyrrole) (Ppy) junctions were synthesized electrochemically using porous aluminum oxide as a template. The effects of the conditions of electrochemical synthesis on Ppy growth and protein (avidin or st ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830897

17. Controlling The Growth Direction of ZnO Nanowires (NWs) on c and a -Plane Sapphire
Published: 2/1/2004
Authors: Babak Nikoobakht, Albert Davydov, Stephan J Stranick
Abstract: The issue of controlling the growth direction of NWs is vital in nanotechnology applications and future optoelectronic devices. In an effort to address the above, we have begun studies aimed at selectively controlling the growth direction of horizont ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831331

18. Near-Field Vibrational Spectroscopy: Infrared and Raman Studies at High Spatial Resolution
Published: 1/1/2002
Authors: Stephan J Stranick, D B Chase, Chris A Michaels
Abstract: The ability to measure chemical bond changes on the nanometer scale is of critical importance for the characterization of catalytic materials, engineered materials and surfaces relevant to biological problems. In this paper, we will outline the deve ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831253

19. Modeling Illumination-Mode Near-Field Optical Microscopy of Au Nanoparticles
Published: 3/1/2001
Authors: A Liu, A Rahmani, Garnett W Bryant, Lee J Richter, Stephan J Stranick
Abstract: We present a theoretical analysis of near-field scanning optical microscopy (NSOM) images of small Au particles made in illumination mode. We model the metal-coated fiber tip as a thin disk consisting of a glass core and an aluminum coating. An ext ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840936

20. Chemical Imaging With Scanning Near-Field Infrared Microscopy and Spectroscopy
Published: 10/1/2000
Authors: Chris A Michaels, Lee J Richter, Richard R Cavanagh, Stephan J Stranick
Abstract: The development of a scanning near-field microscope that utilizes infrared absorption as the optical contrast mechanism is described. This instrument couples the nanoscale spatial resolution of a scanning probe microscope with the chemical specifici ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831196



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