The recently developed scanning electrochemical microscopy (SECM) is a new version of the so called scanning probe microscopy. It can provide chemical information containing image about different targets, interfaces with high resolution. The paper partly gives a short introduction to the principles and practice of the SECM, partly reports on the construction of a new type of electrochemical microscope. The measuring tip positioning device of the new microscope is based on commercially available two phase stepper motor driven linear modules. With this a smallest travel distance step of 75 nm, that is linear travel resolution could be achieved. The home built electronic unit and the Windows 95 compatible measuring and image forming program furnish the microscope to operate in both amperometric and potentiometric modes. The performance and a few potential applications of the apparatus are illustrated by describing the preparation of different microscopic images. Tracing heterogeneous enzyme catalyzed processes, preparation of topographic surface images of solid surfaces with chemical information content, showing concentration profile produced by electrochemical reactions are among the examples selected.
|Translated title of the contribution||Development and investigation of a novel scanning electrochemical microscope|
|Number of pages||13|
|Journal||Magyar Kemiai Folyoirat, Kemiai Kozlemenyek|
|Publication status||Published - Dec 1 1998|
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