511 Development of Pressure Sensitive Molecular Film Applicable to High Knudsen Number Flows

Abstract

To analyze a micro/nano scale flow, we need to adopt a measurement technique that treats the flow as a molecular flow, because the flow cannot be treated as continuum. The pressure sensitive molecular film (PSMF) technique employs interaction between molecules, hence it is suitable for pressure measurement in the flow. We developed PSMF that is effective in the low pressure range. Typically, effective pressure range of PSMF depends mainly on the kind of luminophores. In this study, we adopt new luminophores in order to develop a new PSMF for near-atmospheric pressure range. Furthermore, because luminophores of PSMF are easily deteriorated by light, it is very important to consider photo-deterioration in pressure measurement by PSMF. In this study, we also analyzed photo-deterioration of PSMF to clarify basic photo-deterioration feature of PSMF.