Response Kinetics of Chemically Modified Piezoelectric Quatz Piezoelectric Crystals During Odorant Stimulation

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Title Response Kinetics of Chemically Modified Piezoelectric Quatz Piezoelectric Crystals During Odorant Stimulation
Author Saunders, Bruce; Thiel, David Victor; Mackay-Sim, Alan
Journal Name Analyst, The
Year Published 1995
Place of publication UK
Publisher Royal Society of Chemistry
Abstract When chemically-modified piezoelectric quartz crystals are used to detect odorous compounds in air the maximum frequency changes induced by odorants vary both within and between sensors. This variability is reduced when stimulation variables, such as flow rate, odorant concentration and duration, are closely controlled. Precise control of the stimulus allows time-dependent frequency responses to be observed as odorants interact with the sensor surface. The aim of the present experiments was to examine in detail the time-dependent frequency responses of sensors (functionalized with one of six different surface coatings) when exposed to one of 18 odorants. The results demonstrate that these time-dependent responses (termed kinetic signatures) were characteristic of each odorant–surface interaction. They were repeatable for each sensor and reproducible among sensors with inter-crystal variability reduced virtually to zero. Kinetic signatures were independent of the maximum frequency change induced by odorants and they appear to be useful as a new method of analysing odorant–surface interactions; an application for odorant discrimination using a six-sensor array and artificial neural network analysis is demonstrated.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.rsc.org/Publishing/Journals/AN/Index.asp
Alternative URI http://dx.doi.org/10.1039/AN9952001013
Volume 120
Page from 1013
Page to 1018
ISSN 0003-2654
Date Accessioned 1996-01-01
Date Available 2009-09-21T05:51:31Z
Language en_AU
Research Centre Centre for Wireless Monitoring and Applications; Eskitis Institute for Drug Discovery
URI http://hdl.handle.net/10072/25733
Publication Type Article in Scholarly Refereed Journal
Publication Type Code c1

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