bei Google ScholarTitelangaben
Greibl, Wolfgang ; Hayden, Oliver ; Achatz, Paul ; Fischerauer, Gerhard ; Scholl, Gerd ; Dickert, Franz Ludwig:
Surface phenomena with organic coatings for chemical sensing.
In: Vo-Dinh, Tuan ; Büttgenbach, Stephanus
(Hrsg.):
Advanced Environmental Sensing Technology II. -
Bellingham, WA
: SPIE Press
,
2002
. - S. 160-168
. - (Proceedings of SPIE
; 4576
)
ISBN 0819443042
DOI: https://doi.org/10.1117/12.456953
Abstract
The surface modification of SAW (surface acoustic wave)- and QCM (quartz crystal microbalance)-devices proves very important in chemical sensing. Silanes on one hand are very useful for hydrophobizing of quartz-surfaces whereas on the other hand thiols are used to adsorb on gold. In this way the influence of humidity on the transducers, which originates in the hydrophilicity of the quartz is decreased. hese monolayers not only reduce the cross-sensitivity to water but also enhance the sensor effects of solvent vapors. n order to obtain better selectivity molecular hollows, like calix[n]arenes can be attached to the spacers. Another way to improve the selectivity was found in the treatment of the evice with mixtures of silanes and thiols, respectively. In this way cavities are produced in which analytes are incorporated and thus are detected in the lower ppm range. The surface of mass-sensitive devices was also modified in order to detect analytes in the nano- to micrometer range. Here a stamping process with cells yields patterns on polymer surfaces which favor the reinclusion of these microorganisms. These effects are due to geometrical effects and chemical interactions via an adapted polarity and hydrogen bonds of the chosen polymer. The sensor responses proved highly selective to the bacteria in respect to nutrient liquid and other microorganisms.
Weitere Angaben
| Publikationsform: | Aufsatz in einem Buch |
|---|---|
| Begutachteter Beitrag: | Nein |
| Institutionen der Universität: | Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik > Lehrstuhl Mess- und Regeltechnik - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer Fakultäten |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 17 Jul 2024 08:42 |
| Letzte Änderung: | 17 Jul 2024 08:42 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/89970 |