Non-intrusive measurement of microscale temperature distribution by spontaneous Raman imaging

Reiko Kuriyama, Yohei Sato

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A non-intrusive and spatially resolved temperature measurement technique based on spontaneous Raman imaging was developed to measure two-dimensional temperature distributions in microfluidic systems. Raman scattering arising from OH stretching vibrations of H2O molecules was used to measure the local channel flow temperature because of its high sensitivity to temperature. The OH stretching band has two parts with contrasting temperature dependences: hydrogen-bonded (HB) and non-hydrogen-bonded (NHB) modes. Raman images of HB and NHB modes were separately captured by an electron-multiplying charge-coupled device camera using two bandpass filters with center wavelengths of 642 and 660 nm, respectively. The two-dimensional temperature distributions were obtained from the intensity ratio of the two images by applying a calibration curve, which showed that there was a linear relationship between the temperature and the intensity ratio of HB to NHB modes for temperatures in the range 293-333 K. Temperature distribution measurements were demonstrated in the mixing flow field in the junction area of a T-shaped channel composed of a poly(dimethylsiloxane) chip and borosilicate glass slides. Non-uniform temperature distributions were quantitatively visualized at a spatial resolution of 12.8 × 12.8 μm2 for three different heating conditions.

Original languageEnglish
Pages (from-to)1031-1037
Number of pages7
JournalMicrofluidics and Nanofluidics
Volume14
Issue number6
DOIs
Publication statusPublished - 2013 Jun

Fingerprint

nonintrusive measurement
microbalances
Temperature distribution
temperature distribution
Imaging techniques
Hydrogen
hydrogen
Stretching
Temperature
temperature
borosilicate glass
channel flow
bandpass filters
chutes
Borosilicate glass
temperature measurement
charge coupled devices
Polydimethylsiloxane
Channel flow
CCD cameras

Keywords

  • Microchannel flow
  • Non-intrusive
  • Raman imaging
  • Temperature measurement
  • Water

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

Cite this

Non-intrusive measurement of microscale temperature distribution by spontaneous Raman imaging. / Kuriyama, Reiko; Sato, Yohei.

In: Microfluidics and Nanofluidics, Vol. 14, No. 6, 06.2013, p. 1031-1037.

Research output: Contribution to journalArticle

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