Extension and characterization of pressure-sensitive molecular film
Extension and characterization of pressure-sensitive molecular film
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DOI：
10.1007/s00348-009-0694-6
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发表时间：
2009-12-01
影响因子：
2.4
通讯作者：
Niimi, Tomohide
中科院分区：
文献类型：
--
作者：
Matsuda, Yu;Mori, Hideo;Niimi, Tomohide
压敏漆（PSP）作为一种分子传感器，在高克努森数区具有作为压力测量诊断工具的潜力。然而，很少有报道涉及PSP应用于微型器件，因为传统的PSP太厚，由于聚合物粘合剂。在我们之前的工作中，我们采用LB技术制备了仅在低压范围（低于130 Pa）具有压敏性的Pd（II）中卟啉IX（PdMP）压敏分子膜（PSMF）。在这项研究中，针对在大气压条件下的压力测量，我们构建了四个样品的PSMF组成的Pt（II）中卟啉IX（PtMP），Pt（II）中卟啉IX二甲基酯（PtMPDME），Pt（II）原卟啉IX（PtPP）和Cu（II）中卟啉IX二甲基酯（CuMPDME）作为发光分子。测量了这些PSMF的压力灵敏度，并且澄清了PSMF-PtMP的压力灵敏度是四种样品中最高的。研究了PSMF-PtMP的温度依赖性，发现PSMF-PtMP的温度依赖性不是由氧在层中的扩散决定的，而是由激发态发光分子的非辐射失活过程决定的。
Pressure-sensitive paint (PSP) has the potential as a diagnostic tool for pressure measurement in high Knudsen number regime because it works as a so-called "molecular sensor". However, there are few reports concerning application of PSP to micro-devices, because conventional PSPs are too thick owing to polymer binders. In our previous work, we adopted the Langmuir-Blodgett (LB) technique to fabricate the pressure-sensitive molecular film (PSMF) using Pd(II) Mesoporphyrin IX (PdMP), which has pressure sensitivity only in the low pressure range (below 130 Pa). In this study, aiming for pressure measurement under an atmospheric pressure condition, we have constructed four samples of PSMFs composed of Pt(II) Mesoporphyrin IX (PtMP), Pt(II) Mesoporphyrin IX dimethylester (PtMPDME), Pt(II) Protoporphyrin IX (PtPP) and Cu(II) Mesoporphyrin IX dimethylester (CuMPDME) as luminescent molecules. The pressure sensitivity of those PSMFs was measured, and it was clarified that the pressure sensitivity of PSMF-PtMP is the highest among the four samples. Moreover, the temperature dependency of PSMF-PtMP was investigated, and we found that the temperature dependency of PSMF is dominated not by the oxygen diffusion in the layer, but by non-radiative deactivation process of excited luminescent molecules.