マイクロ流れ計測のための感圧分子膜の開発と評価(分子スケールの流れ,一般講演)

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  • Development and assessment of a pressure sensitive molecular film as a measurement technique for micro-flows

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The pressure-sensitive paint (PSP) technique has the potential as a diagnostic tool for measurement in the high Knudsen number regime because it works as a so-called "molecular sensor". However, application of the PSP technique to micro-systems is difficult because the conventional PSP is too thick owing to the use of polymer binder and does not have sufficient spatial resolution for pressure measurement of micro-flows. We constructed pressure sensitive molecular film (PSMF), using Platinum (II) MesoporphyrinIX (PtMP) as a luminescent molecule, and have examined our PSMF to evaluate the possibility of application to the measurement of micro-flows. It is clarified that the pressure sensitivity of PtMP based PSMF is equal to the that of conventional polymer PSP. The pressure distribution on the solid surface interacting with supersonic free-jet can be measured with PSMF composed of PtMP. This indicates that the PSMF is feasible to measure the pressure in high Knudsen number flows such as micro-flows.

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