Are single molecular wires conducting?
Are single molecular wires conducting?
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DOI：
10.1126/science.271.5256.1705
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发表时间：
1996-03-22
期刊：
影响因子：
56.9
通讯作者：
Weiss, PS
中科院分区：
文献类型：
--
作者：
Bumm, LA;Arnold, JJ;Weiss, PS
在高隧道结阻抗（100千兆欧）下，利用扫描隧道显微镜（STM）和微波频率交流STM对插入到Au{111}表面的“非导电"正十二烷乙烷自组装单分子膜中的分子线候选物进行了探测，以评估其电学性质。插入的共轭分子是4，4 ′-二（亚苯基-亚乙炔基）苯硫醇盐衍生物，形成单分子线，从Au{111}衬底延伸到约7埃以上，并且与烷硫醇盐相比具有非常高的导电性。
Molecular wire candidates inserted into ''nonconducting'' n-dodecanethiol self-assembled monolayers on Au{111} were probed by scanning tunneling microscopy (STM) and microwave frequency alternating current STM at high tunnel junction impedance (100 gigohms) to assess their electrical properties. The inserted conjugated molecules, which were 4,4'-di(phenylene-ethynylene)benzenethiolate derivatives, formed single molecular wires that extended from the Au{111} substrate to about 7 angstroms above and had very high conductivity as compared with that of the alkanethiolate.