Utilising digital micro-mirror device (DMD) as scanning light source for light-addressable potentiometric sensors (LAPS)

T. Wagner, K. Miyamoto, C. F. Werner, M. J. Schöning, T. Yoshinobu

研究成果: Article査読

9 被引用数 (Scopus)

抄録

The light-addressable potentiometric sensor (LAPS) is a semiconductor-based chemical sensor that utilises light beams to address individual parts of the semiconductor chip for spatially resolved measurements. The photocurrent depends on the local chemical analyte concentration. Hence, a flexible and miniaturised light source which is capable of addressing a large number of measurement spots is desired. DMD (digital micro-mirror device) is a MEMS device well known as main technology for multimedia projectors. These micro-mirror arrays are used to define hundreds of thousands of light beams in a flexible way. In this work, the authors demonstrate the usage of the DMD technology to allow the definition of thousands of measurement spots on a LAPS structure. For each measurement spot a photocurrent versus bias voltage (lIV) curve can be recorded. A shift along the horizontal axis can be evaluated and the change of the analyte concentration at the measurement spot can be determined.

本文言語English
ページ(範囲)812-815
ページ数4
ジャーナルSensor Letters
9
2
DOI
出版ステータスPublished - 2011 4

ASJC Scopus subject areas

  • 原子分子物理学および光学
  • 電子工学および電気工学

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