Analytical study on carbonaceous sensing layers to chemical impulses based on gas-sorption dynamics

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560863
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Tokyo University of Technology
• Principal Investigator: SUGIMOTO Iwao 東京工科大学, コンピュータサイエンス学部, 教授 (70350501)
• Co-Investigator(Kenkyū-buntansha): TAKAHASHI Kazuhiko 同志社大学, 理工学部, 教授 (90332808)
• Co-Investigator(Renkei-kenkyūsha): MURAMATSU Hiroshi 東京工科大学, 応用生物学部, 教授 (20373045)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 膜表面 / ガス吸着 / 感応膜 / 過渡応答 / 数理モデル

Outline of Final Research Achievements

The surface potentials and interaction forces of chemical sensing layers have been evaluated by scanning probe microscopy, which can identify the shape-oriented changes induced by chemical impulses. The pectin-sputtered films composed of the densely packed columns have the amphiphilic characteristics with carbonaceous structure. These surface characters of the films are sensitively affected by the polar chemical species. Based on an electric equivalent circuit, impedance analysis revealed that the elasticity of the films has been increased by the sorption of polar species. On the contrary, the non-polar species tend to slightly change the surface characteristics. We can recognize that the sensor responses can be simulated by a combination of the sorption processes, such as a diffusion, adsorption, and solvation, using the structural parameters of the films.

Free Research Field

表面科学