期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 90, 期 1-3, 页码 46-51出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0925-4005(03)00020-0
关键词
optics; interference; phase measurements; biosensors; array
A new label-free optical biosensing method has been developed, which can be called Spectral Correlation Method (SCM). The method is based on measurements of a correlation signal of two interferometers in an original optical scheme. The first interferometer is a scanned Fabry-Perot interferometer, in which the distance between two mirrors is periodically changed by a peizoelectric driver. The second interferometer is formed by a biochip, which is a simple glass plate with thickness of several tens or hundreds microns with different recognition spots or wells, or flow channels. In our experiments, a microscope cover glass was successfully used as a biochip to detect reactions of binding or detachment of different biological agents in real time. Two- and 96-channel SCM devices have been designed to register bio- and chemical-components in real time. The sensogram drifts for these devices expressed in terms of layer thickness were 20 and 40 pm/h, respectively. (C) 2003 Elsevier Science B.V. All rights reserved.
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