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Labs on Chip
book

Labs on Chip

by Eugenio Iannone
September 2018
Intermediate to advanced content levelIntermediate to advanced
1178 pages
48h 30m
English
CRC Press
Content preview from Labs on Chip

11.3  LAB-ON-CHIP SPECTROSCOPY

11.3.1  ABSORPTION SPECTROSCOPY

From the analysis of the interaction between a biological solution of target molecules and an optical radiation it is clear that the attenuation a light beam experiences while traveling through the solution is composed by essentially three phenomena, each of which contributes to the overall attenuation to a specific attenuation coefficient:

•  Absorption of photons by solvent molecules or ions

•  Ion current generated by the optical field

•  Absorption of photons by target molecules

The first phenomenon is generally negligible when a solvent transparent to the light frequency is used, for example, water if visible light is considered. The propagation distance into the lab on chip ...

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Publisher Resources

ISBN: 9781466560727