Abstract
The pressure-sensitive paint (PSP) technique has the potential as a diagnostic tool for measurements 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. We constructed pressure sensitive molecular film (PSMF), using Palladium(II) MesoporphyrinIX (PdMP), and have examined our PSMF to evaluate the possibility of application to the measurement of micro flow. It is found that the latter PSMF has sufficient sensitivity in the low pressure region with high Knudsen number, even if the amount of the luminescent molecules in PSMF layer is smaller than that in conventional PSP. This indicates that the PSMF is feasible to measure the pressure in high Knudsen number flow such as micro flows.
