New analysis of organic gas response for ultra-thin LB films

Author

Kwon, Young-Soo ; Kim, Do-Kyun ; Lee, Eul-Sik ; Jin, Chetl-Nam

Author_Institution

Dept. of Electr. Eng., Dong-A Univ., Pusan, South Korea

fYear

1998

fDate

27-30 Sep 1998

Firstpage

513

Lastpage

517

Abstract

The electrical properties of maleate copolymer (C₁₈MA-VE₂) Langmuir-Blodgett (LB) films were investigated to develop the gas sensor. The conductivity of C₁₈MA-VE₂ LB films were 10^-7[S/cm] for an in-plane. The change of conductivity was occurred by behavior of organic gases, which mean that the behavior of organic gases could be analyzed using conductivity change and applied to the gas sensor. Also, the new gas sensing system using quartz crystal has been studied. The new analytical variable of resonant resistance, which represents the qualitative changes (or viscoelasticity change) of organic material on quartz crystal, was adopted to analyze the mass sensing properties between quartz crystal and fatty acid LB films. As a result, the resonant frequency change is more sensitive to high molecular weight than to low molecular ones

Keywords

Langmuir-Blodgett films; electrical conductivity; gas sensors; organic compounds; polymer films; C₁₈MA-VE₂; electrical conductivity; fatty acid; maleate copolymer; mass sensor; molecular weight; organic gas sensor; quartz crystal microbalance; resonant frequency; resonant resistance; ultra-thin Langmuir-Blodgett film; viscoelasticity; Chemical sensors; Conducting materials; Conductive films; Conductivity; Frequency; Gas detectors; Gases; Information analysis; Organic materials; Resonance;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulating Materials, 1998. Proceedings of 1998 International Symposium on

Conference_Location

Toyohashi

Print_ISBN

4-88686-050-8

Type

conf

DOI

10.1109/ISEIM.1998.741794

Filename

741794