期刊
ANALYTICA CHIMICA ACTA
卷 601, 期 2, 页码 141-155出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2007.08.046
关键词
microfluidic devices; lab-on-a-chip; optical sensing; optical modes; absorbance; fluorescence; chemiluminescence
This review deals with the application of optical sensing systems for microfluidic devices. In the off-chip approach macro-scale optical infrastructure is coupled, while the on-chip approach comprises the integration of micro-optical functions into microfluidic devices. The current progress of the use of both optical sensing approaches in microfluidic devices, as well as its applications is described. In all cases, sensor size and shape profoundly affect the detection limits, due to analyte transport limitation, not to signal transduction limitation. The micro- or nanoscale sensors are limited to picomolar-order detection for practical time scales. The review concludes with an assessment of future directions of optical sensing systems for integrated microfluidic devices. (c) 2007 Elsevier B.V All rights reserved.
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