在金（111）基底上自组装的亚苯基乙炔低聚物的扫描隧道显微镜研究。
Scanning tunneling microscopy of self-assembled phenylene ethynylene oligomers on Au(111) substrates.
作者信息
Walzer Karsten, Marx Eike, Greenham Neil C, Less Robert J, Raithby Paul R, Stokbro Kurt
机构信息
Mikroelektronik Centret (MIC), Technical University of Denmark, Bldg. 345 East, DK-2800 Lyngby, Denmark.
出版信息
J Am Chem Soc. 2004 Feb 4;126(4):1229-34. doi: 10.1021/ja036771v.
In this paper, we report the self-assembly, electrical characterization, and surface modification of dithiolated phenylene-ethynylene oligomer monolayers on a Au(111) surface. The self-assembly was accomplished by thiol bonding the molecules from solution to a Au(111) surface. We have confirmed the formation of self-assembled monolayers by scanning tunneling microscopy (STM) and optical ellipsometry, and have studied the kinetics of film growth. We suggest that self-assembled phenylene ethynylene oligomers on Au(111) surfaces grow as thiols rather than as thiolates. Using low-temperature STM, we collected local current-voltage spectra showing negative differential resistance at 6 K.
在本文中，我们报告了二硫醇化亚苯基乙炔低聚物单层在Au(111)表面的自组装、电学表征及表面修饰。自组装是通过将溶液中的分子通过硫醇键合到Au(111)表面来实现的。我们通过扫描隧道显微镜(STM)和椭圆偏振光谱法证实了自组装单层的形成，并研究了膜生长的动力学。我们认为，Au(111)表面上的自组装亚苯基乙炔低聚物以硫醇形式而非硫醇盐形式生长。利用低温STM，我们收集了在6 K时显示负微分电阻的局部电流-电压谱。
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