Single-metalloprotein wet biotransistor

被引:86
作者
Alessandrini, A
Salerno, M
Frabboni, S
Facci, P [1 ]
机构
[1] INFM Natl Ctr Nanostruct Biosyst Surfaces S3, I-41100 Modena, Italy
[2] Univ Modena & Reggio Emilia, Dept Phys, I-41100 Modena, Italy
关键词
D O I
10.1063/1.1896087
中图分类号
O59 [应用物理学];
学科分类号
摘要
Metalloproteins are redox molecules naturally shuttling electrons with high efficiency between molecular partners. As such, they are candidates of choice for bioelectronics. In this work, we have used bacterial metalloprotein azurin, hosted in a nanometer gap between two electrically biased gold electrodes, to demonstrate an electrochemically gated single-molecule transistor operating in an aqueous environment. Gold-chemisorbed azurin shows peaks in tunneling current upon changing electrode potential and a related variation in tunneling barrier transparency which can be exploited to switch an electron current through it. These results suggest the wet approach to molecular electronics as a viable method for exploiting electron transfer of highly specialized biomolecules. (C) 2005 American Institute of Physics.
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页码:1 / 3
页数:3
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