Noise in quartz crystal microbalance

Author

Sedlak, Petr ; Sikula, Josef ; Majzner, Jiri ; Vrnata, Martin ; Vyslouzil, Filip ; Fitl, Premysl ; Kopecky, Dusan ; Handel, Peter H.

Author_Institution

Dept. of Phys., Brno Univ. of Technol., Brno, Czech Republic

fYear

2011

fDate

12-16 June 2011

Firstpage

336

Lastpage

339

Abstract

There are several mechanisms that are related to fluctuation phenomena in QCM. The aim of our research is oriented to study the sensitivity and influence of different kind of noises on sensor resolution. Our experiments are provided on sensor with sorption layer of polypyrrole which is suitable for detection of water vapor. Based on these experiments, we suppose that 1/f noise caused by quartz internal friction and adoption-desorption (generation-recombination) noise from analyzed gas create the main components of measured noise spectral density. The value of the adoption-desorption noise depends on the physical and chemical parameters of analyzed gas and it is proportional to gas density. Adsorption-desorption kinetics is described by Kolmogorov equation and compared with Wolkenstein and Langmuir equations.

Keywords

adsorption; chemical sensors; desorption; fluctuations; quartz; Kolmogorov equation; Langmuir equation; Wolkenstein equation; adoption-desorption noise; adsorption-desorption kinetics; chemical parameter; fluctuation phenomena; gas density; noise spectral density; physical parameter; polypyrrole; quartz crystal microbalance; quartz internal friction; sensor resolution; sorption layer; water vapor detection; Crystals; Equations; Fluctuations; Frequency measurement; Humidity; Mathematical model; Noise; Kolmogorov equations; adsorption-desorption noise; noise spectroscopy; quartz crystal microbalance;

fLanguage

English

Publisher

ieee

Conference_Titel

Noise and Fluctuations (ICNF), 2011 21st International Conference on

Conference_Location

Toronto, ON

Print_ISBN

978-1-4577-0189-4

Type

conf

DOI

10.1109/ICNF.2011.5994336

Filename

5994336