6-5 水の近赤外吸収特性を利用したマイクロ流路内水溶液の温度イメージング(セッション6:マイクロ物理センサ)

概要

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This paper presents a remote and preparation-free method of temperature imaging of aqueous solutions in microchannels of micro-fluidic chips. The principle of this method is based on the temperature dependency of the near-infrared absorption band (v_2+v_3 band) of water. Temperature images were constructed from absorbances at the wavelength of 1908nm, the most sensitive to temperature in the band, measured by using a near-infrared camera and optical narrow-bandpass filter. Calculation and calibration results demonstrated a temperature coefficient of 1.5×10^<-2>K^<-1>mm^<-1>. Temperature images of 0.05mm thick water in a Y-shaped PDMS microchannel locally heated by a neighboring hot wire were obtained, in which thermal diffusion processes in the microchip were visualized.
一般社団法人日本機械学会の論文
2011-09-25