Imaging electric field dynamics with graphene optoelectronics.
Imaging electric field dynamics with graphene optoelectronics.
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DOI:
10.1038/ncomms13704
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发表时间:
2016-12-16
影响因子:
16.6
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中科院分区:
文献类型:
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The use of electric fields for signalling and control in liquids is widespread, spanning bioelectric activity in cells to electrical manipulation of microstructures in lab-on-a-chip devices. However, an appropriate tool to resolve the spatio-temporal distribution of electric fields over a large dynamic range has yet to be developed. Here we present a label-free method to image local electric fields in real time and under ambient conditions. Our technique combines the unique gate-variable optical transitions of graphene with a critically coupled planar waveguide platform that enables highly sensitive detection of local electric fields with a voltage sensitivity of a few microvolts, a spatial resolution of tens of micrometres and a frequency response over tens of kilohertz. Our imaging platform enables parallel detection of electric fields over a large field of view and can be tailored to broad applications spanning lab-on-a-chip device engineering to analysis of bioelectric phenomena. Detection of electric fields, central to chemical and biological processes, has been limited to measurements of current (e.g., electrodes) and secondary reporters (e.g., fluorescent dyes). Here, the authors demonstrate an optical platform capable of imaging electric field dynamics with high spatio-temporal resolution.
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影响因子:
56.9
作者:
Nair, R. R.;Blake, P.;Geim, A. K.
通讯作者:
Geim, A. K.
DOI:
10.1038/nrn3241
发表时间:
2012-05-18
期刊:
Nature reviews. Neuroscience
影响因子:
--
作者:
Buzsáki G;Anastassiou CA;Koch C
通讯作者:
Koch C
影响因子:
4.6
作者:
Lee, Seung Hoon;Choi, Jeongmook;Kim, Hyeon-Don;Choi, Hyunyong;Min, Bumki
通讯作者:
Min, Bumki
影响因子:
10.8
作者:
Gan, Xuetao;Mak, Kin Fai;Englund, Dirk
通讯作者:
Englund, Dirk
影响因子:
6.1
作者:
Hunt, Thomas P.;Issadore, David;Westervelt, R. M.
通讯作者:
Westervelt, R. M.