Publication detail

EQUIVALENT CIRCUIT OF POLYPYRROLE-BASED QCM

VONDRA, M.

Original Title

EQUIVALENT CIRCUIT OF POLYPYRROLE-BASED QCM

Type

conference paper

Language

English

Original Abstract

Quartz crystal microbalance belongs to a group of high-sensitive chemical sensors for detection of substances dispersed or dissolved in gas or liquid environments. Several equivalent circuits exist for the QCM sensor. Design of these circuits depends mainly on an active layer of sensor as well as on an environment, in which a sensor is applied. An equivalent circuit is usually separated in two parts; the first one corresponds to quartz crystal, while the second part relates to chemical and physical properties, such as concentration of detected matter, viscosity of an active layer, viscosity of environment, etc.. For design of driven-oscillator circuit of QCM, it is necessary to develop accurate equivalent circuit, which is able to simulate behavior of QCM for a large range of concentration of detected matter. In the paper, the study is provided on polypyrrole-based QCM. Polypyrrole is suitable material for humidity measurements, and was deposited by matrix assisted pulsed laser evaporation. Electrical characteristics of polypyrrole-based QCM were measured different concentrations of relative humidity. These experimental data are in good agreement with calculations based on our equivalent circuits. We can accurately simulate behavior of QCM in gas environment for various concentrations.

Keywords

gas sesnsing, polypyrrole, humidity, quarzt crystal micorbalance

Authors

VONDRA, M.

RIV year

2012

Released

10. 10. 2012

Publisher

Litera Brno

Location

Brno Česká republika

ISBN

978-80-214-4594-9

Book

New Trends In Physics - Proceedings of the conference

Edition number

1

Pages from

195

Pages to

198

Pages count

4

BibTex

@inproceedings{BUT94364,
  author="Marek {Vondra}",
  title="EQUIVALENT CIRCUIT OF POLYPYRROLE-BASED QCM",
  booktitle="New Trends In Physics - Proceedings of the conference",
  year="2012",
  number="1",
  pages="195--198",
  publisher="Litera Brno",
  address="Brno
Česká republika",
  isbn="978-80-214-4594-9"
}