Broadband cavity-enhanced absorption spectroscopy for real time, in situ spectral analysis of microfluidic droplets | Zendy

Simon R. T. Neil | Zendy; Cathy M. Rushworth | Zendy; Claire Vallance | Zendy; Stuart R. Mackenzie | Zendy

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Broadband cavity-enhanced absorption spectroscopy for real time, in situ spectral analysis of microfluidic droplets

Author(s) -

Simon R. T. Neil,

Cathy M. Rushworth,

Claire Vallance,

Stuart R. Mackenzie

Publication year - 2011

Publication title -

lab on a chip

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.064

H-Index - 210

eISSN - 1473-0197

pISSN - 1473-0189

DOI - 10.1039/c1lc20854c

Subject(s) - supercontinuum , materials science , broadband , microfluidics , absorption (acoustics) , absorption spectroscopy , spectroscopy , optoelectronics , optics , in situ , chemistry , nanotechnology , wavelength , photonic crystal fiber , physics , quantum mechanics , composite material , organic chemistry

Broadband cavity-enhanced absorption spectroscopy has been used to record, in real time, the absorption spectrum of microlitre volume aqueous phase droplets within a microfluidic chip assembly. Using supercontinuum radiation and broadband coated external mirrors, the full visible spectrum (430 nm < λ < 700 nm) of each passing droplet is acquired in situ at high repetition rates (273 Hz/3.66 ms acquisition time) and high sensitivity (α(min) < 10(-2) cm(-1)). The possibilities for further improvements in sensitivity and acquisition rate using custom designed chips are discussed.

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