作者
Nikhil S Malvankar, Madeline Vargas, Kelly P Nevin, Ashley E Franks, Ching Leang, Byoung-Chan Kim, Kengo Inoue, Tünde Mester, Sean F Covalla, Jessica P Johnson, Vincent M Rotello, Mark T Tuominen, Derek R Lovley
发表日期
2011/9
期刊
Nature nanotechnology
卷号
6
期号
9
页码范围
573-579
出版商
Nature Publishing Group UK
简介
Electronic nanostructures made from natural amino acids are attractive because of their relatively low cost, facile processing and absence of toxicity,,. However, most materials derived from natural amino acids are electronically insulating,,,,,. Here, we report metallic-like conductivity in films of the bacterium Geobacter sulfurreducens and also in pilin nanofilaments (known as microbial nanowires,) extracted from these bacteria. These materials have electronic conductivities of ∼5 mS cm−1, which are comparable to those of synthetic metallic nanostructures. They can also conduct over distances on the centimetre scale, which is thousands of times the size of a bacterium. Moreover, the conductivity of the biofilm can be tuned by regulating gene expression, and also by varying the gate voltage in a transistor configuration. The conductivity of the nanofilaments has a temperature dependence similar to that of a disordered …
学术搜索中的文章
NS Malvankar, M Vargas, KP Nevin, AE Franks… - Nature nanotechnology, 2011