Light-addressable potentiometric sensors for (bio-)chemical sensing and imaging

M. J. Schöning, Torsten Wagner, A. Poghossian, K. I. Miyamoto, C. F. Werner, S. Krause, T. Yoshinobu

研究成果: Chapter

抄録

A light-addressable potentiometric sensor (LAPS) is a chemical sensor based on the field effect in semiconductor. The width of the space-charge layer at the insulator-semiconductor interface responds to the interfacial potential on the sensing surface, which is a function of the analyte concentration. The variation of the capacitance of the space-charge layer is read out in the form of a photocurrent induced by a light probe. This light-addressability allows spatially resolved measurements of the analyte concentration. The article summarizes various aspects of the LAPS, such as the measurement setup, principle of operation, visualization of analyte concentration, as well as visualization of impedance in the scanning photoinduced impedance microscopy (SPIM) mode, spatial and temporal resolutions, functionalization of the sensing surface, and applications.

本文言語English
ホスト出版物のタイトルEncyclopedia of Interfacial Chemistry
ホスト出版物のサブタイトルSurface Science and Electrochemistry
出版社Elsevier
ページ295-308
ページ数14
ISBN(電子版)9780128098943
ISBN(印刷版)9780128097397
DOI
出版ステータスPublished - 2018 1 1

ASJC Scopus subject areas

  • 化学 (全般)

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