title: Imaging Local Electric Field Distribution by Plasmonic Impedance Microscopy.
abstract: 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.
authors.affiliation: Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.|Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States .
authors.forename: Yixian
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.|Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States .
authors.forename: Xiaonan
authors.initials: X
authors.lastname: Shan
authors.affiliation: Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.|Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States .
authors.forename: Shaopeng
authors.initials: S
authors.lastname: Wang
authors.affiliation: Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.|Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States .
authors.forename: Nongjian
authors.initials: N
authors.lastname: Tao
authors.affiliation: Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.|Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States .
authors.forename: Pierre-Yves
authors.initials: PY
authors.lastname: Blanchard
authors.affiliation: Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.|Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States .
authors.forename: Keke
authors.initials: K
authors.lastname: Hu
authors.affiliation: Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.|Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States .
authors.forename: Michael V
authors.initials: MV
authors.lastname: Mirkin
mesh_terms: D017097:Electric Impedance; D055664:Electrochemical Techniques; D004566:Electrodes; D008853:Microscopy / Q000379:methods*; D010316:Particle Size; D020349:Surface Plasmon Resonance; D013499:Surface Properties