Structure and dynamics of tetramethylthiourea adsorption on Au(111) studied by in situ scanning tunneling microscopy
作者： E. Bunge , R. J. Nichols , B. Roelfs , H. Meyer , H. Baumgärtel
DOI: 10.1021/LA950395D
关键词: Scanning tunneling microscope 、 Cyclic voltammetry 、 Transition metal 、 Capacitance 、 Adsorption 、 Analytical chemistry 、 Chemistry 、 Single crystal 、 Substrate (electronics) 、 Desorption
摘要: We have examined tetramethylthiourea (TMTU) adsorption on Au(111) with cyclic voltammetry, capacitance measurements, and in situ scanning tunneling microscopy (STM). Capacitance measurements indicate that TMTU is adsorbed over a wide potential range. A peak at higher potentials (ca. 650 mV vs SCE) interpreted as arising from the displacement of by bisulfate/sulfate ions. High-resolution STM images show an ordered structure gold surface. Three distinctive spots for each molecule are seen images. From these molecular resolution (3 × 3) adsorbate deduced. Large changes observed step terrace morphology substrate (+400 mV) slightly before maximum assigned to desorption. The slow etching surface onset This deduction has been further supported inductively coupled plasma optical e...
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