Imaging Local Electric Field Distribution by Plasmonic Impedance Microscopy

详细信息    查看全文

• 作者：Yixian Wang ; Xiaonan Shan ; Shaopeng Wang ; Nongjian Tao ; Pierre-Yves Blanchard ; Keke Hu ; Michael V. Mirkin
• 刊名：Analytical Chemistry
• 出版年：2016
• 出版时间：February 2, 2016
• 年：2016
• 卷：88
• 期：3
• 页码：1547-1552
• 全文大小：398K
• ISSN：1520-6882

文摘

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.