|
authors |
Verissimo, MIS; Mantas, PQ; Senos, AMR; Oliveira, JABP; Gomes, MTSR |
|
nationality |
International |
|
journal |
SENSORS AND ACTUATORS B-CHEMICAL |
|
author keywords |
quartz crystals; PZT ceramics; piezoelectric substrates; mass sensors |
|
keywords |
SHEAR-MODE RESONATORS; LIQUID PROPERTIES; PERFORMANCE; FREQUENCY |
|
abstract |
Two piezoelectric materials, quartz and ceramic (PZT), were evaluated as mass sensors. Quartz crystals (polished and unpolished) and one ceramic (Nb-Mn-PZT) were used to detect and quantify fructose in aqueous solutions and s-butylamine in vapour. The frequencies at minimum impedance (fn), maximum impedance (fm), series resonance frequency (fs) and parallel resonance frequency (fp) were monitored. Sensitivities of the devices to the chemical compounds are compared and related to the observed changes of the electrical parameters of the equivalent circuit. Roughness of the surface of the discs (ceramic and quartz crystals) and electrodes were measured and their influence in the observed frequency responses discussed. (C) 2003 Elsevier B.V. All rights reserved. |
|
publisher |
ELSEVIER SCIENCE SA |
|
issn |
0925-4005 |
|
year published |
2003 |
|
volume |
95 |
|
issue |
1-3 |
|
beginning page |
25 |
|
ending page |
31 |
|
digital object identifier (doi) |
10.1016/S0925-4005(03)00397-6 |
|
web of science category |
Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation |
|
subject category |
Chemistry; Electrochemistry; Instruments & Instrumentation |
|
unique article identifier |
WOS:000185567800004
|
