Imaging Local Electric Field Distribution by Plasmonic Impedance Microscopy.
Imaging Local Electric Field Distribution by Plasmonic Impedance Microscopy.
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DOI：
10.1021/acs.analchem.5b04382
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发表时间：
2016-01
影响因子：
7.4
通讯作者：
Yixian Wang;X. Shan;Shaopeng Wang;Yuyuan Tian;P. Blanchard;Keke Hu;M. Mirkin
中科院分区：
文献类型：
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作者：
Yixian Wang;X. Shan;Shaopeng Wang;Yuyuan Tian;P. Blanchard;Keke Hu;M. Mirkin
我们报告了等离子体电化学阻抗显微镜（P-EIM）在电极表面上的局部电场成像。通过将电极放置在位于电极上方的微量移液管内并在两个电极之间施加电压来产生局部电场。我们表明，表面电荷的分布，以及在电极表面的局部电场可以成像与P-EIM。的空间分布和依赖的局部电荷密度和电场之间的距离的微移管和表面的测量，并与有限元计算的结果进行了比较。这项工作还表明了将等离子体成像与扫描离子电导显微镜（SICM）和其他扫描探针显微镜相结合的可能性。
We report on imaging of local electric field on an electrode surface with plasmonic electrochemical impedance microscopy (P-EIM). The local electric field is created by putting an electrode inside a micropipet positioned over the electrode and applying a voltage between the two electrodes. We show that the distribution of the surface charge as well as the local electric field at the electrode surface can be imaged with P-EIM. The spatial distribution and the dependence of the local charge density and electric field on the distance between the micropipet and the surface are measured, and the results are compared with the finite element calculations. The work also demonstrates the possibility of integrating plasmonic imaging with scanning ion conductance microscopy (SICM) and other scanning probe microscopies.