http://www.webreview.dz/ Webreview est un site fédérateur des revues scientifiques. Il met à la disposition des utilisateurs un ensemble de revues scientifiques algériennes couvrant tous les domaines. Webreview est ouvert à toute revue désireuse de publier son contenu en ligne soit en mode d'accès complet ou restreint permettant ainsi la valorisation de la recherche scientifique en Algérie. Webreview et un projet développé par le CERIST au sein de la Division Recherche et Développement en Sciences de l'Information. Pour contacter Webreview par émail : webreview@mail.cerist.dz Pour contacter Webreview par courrier, fax ou téléphone : Centre de Recherche sur l'Information Scientifique et Technique (CERIST) Rue des 03 frères AISSOU, Ben-Aknoun, Alger, Algérie Tél/Fax : +(213)(0) 21.91.21.98 fr SPIP - www.spip.net http://www.webreview.dz/spip.php?article2182 http://www.webreview.dz/spip.php?article2182 2015-02-24T09:55:50Z text/html fr BELLEL A., BOUGHAROUAT A., RAYNAUD P., SAHLI S., SEGU Y. Sensors Quartz crystal microbalance TEOS film Volatile organic compounds <p>In this work, plasma polymerization of tetraethoxysilane (TEOS) has been used for producing QCM chemical sensors. The sensor was exposed towards the methanol and chloroform molecules. The measured isotherms on modified QCM electrode<br class='autobr' /> showed a good reproducibility and reversibility. Generally, the frequency shift (Δf) of QCM increases linearly with the vapor concentration. The evolution of sensor response showed clearly an improvement of the QCM sensibility. However, the film<br class='autobr' /> elaborated from (...)</p> - <a href="http://www.webreview.dz/spip.php?rubrique411" rel="directory">Numéro 01</a> / <a href="http://www.webreview.dz/spip.php?mot7770" rel="tag">Sensors</a>, <a href="http://www.webreview.dz/spip.php?mot8466" rel="tag">Quartz crystal microbalance</a>, <a href="http://www.webreview.dz/spip.php?mot8467" rel="tag">TEOS film</a>, <a href="http://www.webreview.dz/spip.php?mot8468" rel="tag">Volatile organic compounds</a> <div class='rss_chapo'><p>In this work, plasma polymerization of tetraethoxysilane (TEOS) has been used for producing QCM chemical sensors. The sensor was exposed towards the methanol and chloroform molecules. The measured isotherms on modified QCM electrode<br class='autobr' /> showed a good reproducibility and reversibility. Generally, the frequency shift (Δf) of QCM increases linearly with the vapor concentration. The evolution of sensor response showed clearly an improvement of the QCM sensibility. However, the film<br class='autobr' /> elaborated from 50% of TEOS and 50% of O2 was found to be significantly more sensitive than film deposited from high proportion of oxygen due to dense structure. Concerning the selectivity, the results revealed a good affinity of the layer to methanol molecules. Fourier transform infrared spectroscopy (FTIR) analysis showed that VOCs molecules interact via hydrogen bonding due to the presence of the –OH group in the elaborated layers.</p></div>