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Microimpedance—Localized material analysis

2005; Elsevier BV; Volume: 51; Issue: 8-9 Linguagem: Inglês

10.1016/j.electacta.2005.02.120

1873-3859

M.M. Lohrengel, S. Heiroth, K. Kluger, M. Pilaski, Benjamin D. Walther,

Microfluidic and Capillary Electrophoresis Applications

Many technically relevant materials are non-homogeneous in structure. Their investigation requires a locally resolved surface analysis. An exact determination of the accessed area and a potentiostatic control in a three-electrode configuration are necessary. This becomes possible by capillary-based microcells which enable local impedance measurements and even impedance mapping of the surface. Different aspects and strategies of this microimpedance spectroscopy are presented and discussed, together with some examples.