Micro-LIF Measurement in a Micro-channel Using an Micro Laser Light Sheet

마이크로 레이저 평면빔을 이용한 마이크로채널 내에서의 Micro-LIF 측정

  • 윤상열 (부산대학교 대학원, 기계공학과) ;
  • 김재민 (부산대학교 대학원, 기계공학과) ;
  • 김수헌 (부산대학교 대학원, 기계공학과) ;
  • 김경천 (부산대학교 기계공학부)
  • Published : 2004.11.03

Abstract

Measurement of concentration fields in a micro-channel is the crucial technology in the area of Lab-on-a-chip to be used for various bio-chemical applications. It is wel-known that the only possible way to measure the concentration field in the micro-channel is using micro-LIF(Laser Induced Fluorescence) method. However, an accurate concentration field at a given cross plane in a micro-channel has not been made so far due to the limit of light illumination. The present study demonstrates a novel method to provide an ultra thin laser sheet beam having 5 microns thickness by a micro focus laser line generator. Nile Blue A was used as fluorescent dye for LIF measurement. The laser sheet beam illuminates an exact plane of concentration measurement in the micro-channel to increase the signal to noise ratio and reduce the depth uncertainty considerably.

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