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  • Other Sources  (2)
  • Chemistry and Materials (General)  (1)
  • Spacecraft Instrumentation and Astrionics  (1)
  • 2005-2009  (2)
  • 2008  (2)
  • 1
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    Icy Soil Acquisition Device for the 2007 Phoenix Mars Lander (2008)
    In:  CASI
    Details
    Publication Date: 2018-06-12
    Description: The Icy Soil Acquisition Device is a first of its kind mechanism that is designed to acquire ice-bearing soil from the surface of the Martian polar region and transfer the samples to analytical instruments, playing a critical role in the potential discovery of existing water on Mars. The device incorporates a number of novel features that further the state of the art in spacecraft design for harsh environments, sample acquisition and handling, and high-speed low torque mechanism design.
    Keywords: Spacecraft Instrumentation and Astrionics
    Type: 39th Aerospace Mechanisms Symposium; 289-302; NASA/CP-2008-215252
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Surface Analysis of 4-Aminothiophenol Adsorption at Polycrystalline Platinum Electrodes (2008)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: Formation of self-assembled monolayer (SAM) of 4-aminothiophenol (4-ATP) on polycrystalline platinum electrodes has been studied by surface analysis and electrochemistry techniques. The 4-ATP monolayer was characterized by cyclic voltammetry (CV), Raman spectroscopy, reflection absorption infrared (RAIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry (CV) experiments give an idea about the packing quality of the monolayer. RAIR and Raman spectra for 4-ATP modified platinum electrodes showed the characteristic adsorption bands for neat 4-ATP indicating the adsorption of 4-ATP molecules on platinum surface. The adsorption on platinum was also evidenced by the presence of sulfur and nitrogen peaks by XPS survey spectra of the modified platinum electrodes. High resolution XPS studies and RAIR spectrum for platinum electrodes modified with 4-ATP indicate that molecules are sulfur-bonded to the platinum surface. The formation of S-Pt bond suggests that ATP adsorption gives up an amino terminated SAM. Thickness of the monolayer was evaluated via angle-resolved XPS (AR-XPS) analyses. Derivatization of 4-ATP SAM was performed using 16-Br hexadecanoic acid.
    Keywords: Chemistry and Materials (General)
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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