Optical tweezers-assisted cross-correlation analysis for a non-intrusive fluid temperature measurement in microdomains

Chih Ming Cheng, Ming Chih Chang, Yu Fen Chang, Wei Ting Wang, Chien Ting Hsu, Jing Shin Tsai, Chia Yeh Liu, Chien Ming Wu, Keng Liang Ou, Tzu Sen Yang

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3 Citations (Scopus)

Abstract

An image-based approach to predict the fluid temperature in microfluidic flow cell is presented. We apply Fourier-based cross-correlation processing to determine the lateral displacement of the optically trapped bead; therefore, both the mean square displacement (MSD) and the diffusion coefficient (D) can be obtained. On the other hand, applying the Stokes-Einstein equation, together with Faxen's law correction, the theoretical relation showed that D is proportional to (T=η), where T and η are temperature and temperature-dependent fluid viscosity, respectively. Hence, the fluid temperature can be determined by MSD-based thermometry.

Original languageEnglish
Article number067002
JournalJapanese Journal of Applied Physics
Volume51
Issue number6 PART 1
DOIs
Publication statusPublished - Jun 2012

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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    Cheng, C. M., Chang, M. C., Chang, Y. F., Wang, W. T., Hsu, C. T., Tsai, J. S., Liu, C. Y., Wu, C. M., Ou, K. L., & Yang, T. S. (2012). Optical tweezers-assisted cross-correlation analysis for a non-intrusive fluid temperature measurement in microdomains. Japanese Journal of Applied Physics, 51(6 PART 1), [067002]. https://doi.org/10.1143/JJAP.51.067002