Shi-He Yang

Beijing University of Aeronautics and Astronautics (Beihang University), Beijing, Beijing Shi, China

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Publications (2)10.03 Total impact

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    ABSTRACT: We investigated the configuration characteristic and adsorption behavior of 4,4'-thiobisbenzenethiol (TBBT) on the surface of silver nanoparticles (NPs). Under different conditions and preparation processes, several possible surface species were produced including single-end adsorption on a silicon wafer, double-end adsorption and bridge-like adsorption. Although consisting of the same molecule and nano material, different adsorption systems exhibited different spectral characteristics in the surface-enhanced Raman spectroscopy (SERS). A density functional theory (DFT) study further verified the corresponding adsorption states. The combined SERS-DFT study provided a framework towards investigating and designing adsorption systems at a molecular level, indicating the potential use in applications such as nano-sensors.
    Physical Chemistry Chemical Physics 04/2012; · 4.20 Impact Factor
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    ABSTRACT: A highly regular hexapod-like structure of PbS with six symmetric arms has been synthesized by a simple and mild chemical solution route. The hexapod-like PbS structure was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-resolution TEM (HRTEM). The results show that each arm is perpendicular to the other four, and opposite to the last one. The arms are about 0.3-0.6 microm long, which have about 40-60 nm tips and 150-200 nm base. And the arm shows an icicle-like structure and some clear steps, and grows along 100 directions. The most possible growth mechanism discussed herein is based on the characterization results. The Raman spectra of the hexapod-like PbS structure were investigated. The results show that our products are sensitive to the laser and can be photodegraded easily.
    Chemistry 02/2007; 13(10):2903-7. · 5.83 Impact Factor

Publication Stats

3 Citations
10.03 Total Impact Points

Institutions

  • 2007–2012
    • Beijing University of Aeronautics and Astronautics (Beihang University)
      • • School of Chemistry and Environment
      • • Department of Applied Chemistry
      Beijing, Beijing Shi, China
    • The Hong Kong University of Science and Technology
      • Department of Chemistry
      Kowloon, Hong Kong