Advanced operation of heated fluidic resonators via mechanical and thermal loss reduction in vacuum.

ABSTRACT: For simultaneous and quantitative thermophysical measurements of ultrasmall liquid volumes, we have recently developed and reported heated fluidic resonators (HFRs). In this paper, we improve the precision of HFRs in a vacuum by significantly reducing the thermal loss around the sensing element. A vacuum chamber with optical, electrical, and microfluidic access is custom-built to decrease the convection loss by two orders of magnitude under 10^-4 mbar conditions. As a result, the measurement sensitivities for thermal conductivity and specific heat capacity are increased by 4.1 and 1.6 times, respectively. When differentiating between deionized water (H₂O) and heavy water (D₂O) with similar thermophysical properties and ~10% different mass densities, the sign

SUBMITTER: Ko J 

PROVIDER: S-EPMC10564801 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature