On-chip cavity-enhanced absorption spectroscopy using a white light-emitting diode and polymer mirrors.

نویسندگان

  • Cathy M Rushworth
  • Gareth Jones
  • Martin Fischlechner
  • Emma Walton
  • Hywel Morgan
چکیده

We have developed a disposable microfluidic chip with integrated cavity mirrors comprised of two pieces of 3M Vikuiti™ enhanced specular reflector II (ESRII) film, for performing cavity-enhanced absorption spectroscopy with a white light-emitting diode (LED). Compared to measurements made with a chip without cavity mirrors, the absorption path length is enhanced by a maximum factor of 28 at 544 nm, and the sensitivity is enhanced by approximately 5 times, enabling micromolar range detection limits to be achieved in an optical path length of only 50 μm.

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عنوان ژورنال:
  • Lab on a chip

دوره 15 3  شماره 

صفحات  -

تاریخ انتشار 2015