Gap distance and interactions in a molecular tunnel junction.
Gap distance and interactions in a molecular tunnel junction.
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DOI:
10.1021/ja2067737
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发表时间:
2011-09-14
影响因子:
15
通讯作者:
Lindsay, Stuart
中科院分区:
文献类型:
--
作者:
Chang, Shuai;He, Jin;Zhang, Peiming;Gyarfas, Brett;Lindsay, Stuart
The distance between electrodes in a tunnel junction cannot be determined from the external movement applied to the electrodes because of interfacial forces that distort the electrode geometry at the nanoscale. These distortions become particularly complex when molecules are present in the junction, as demonstrated here by measurements of the AC response of a molecular junction over a range of conductivities from micro Siemens to pico Siemens. Specific chemical interactions within the junction lead to distinct features in breakjunction data and these have been used to determine electrode separation in a junction functionalized with 4(5)-(2-mercaptoethyl)-1H-imidazole-2-carboxamide, a reagent developed for reading DNA sequence.
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