Dynamic Photocurrent Images of a Gas Sensing Surface
- 1 May 1999
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 38 (5R) , 2893
- https://doi.org/10.1143/jjap.38.2893
Abstract
A high-speed surface photovoltage technique which uses a numerically processed parallel lock-in amplifier was applied to obtain olfactory images. This high-speed system has measurement time short enough to allow the observation of the time evolution of gas response patterns. Representative images are presented and some of their characteristic features, such as the influence of gas type and the direction of gas flow, are discussed. Possible directions for further improvement of the system are also discussed. The capability to obtain dynamic photocurrent images is an important step towards real-time visualization and further development of olfactory camera technology.Keywords
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