Počet záznamů: 1
Thin metal films in resistivity-based chemical sensing
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SYSNO ASEP 0395852 Druh ASEP A - Abstrakt Zařazení RIV Záznam nebyl označen do RIV Zařazení RIV Není vybrán druh dokumentu Název Thin metal films in resistivity-based chemical sensing Tvůrce(i) Podešva, Pavel (UIACH-O)
Foret, František (UIACH-O) RID, ORCIDCelkový počet autorů 2 Zdroj.dok. CECE 2013. Program and Abstract Book. - : University of Pécs, 2013 / Kilár Ferenc ; Nagy Laura ; Kiss Ibolya - ISBN 978-963-642-517-3
S. 87-87Poč.str. 1 s. Forma vydání Tištěná - P Akce CECE 2013. International Interdisciplinary Meeting on Bioanalysis /10./ Datum konání 25.04.2013-27.04.2013 Místo konání Pécs Země HU - Maďarsko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. HU - Maďarsko Klíč. slova chemiresistor ; thin metal films ; sensor Vědní obor RIV CB - Analytická chemie, separace CEP GBP206/12/G014 GA ČR - Grantová agentura ČR EE2.3.20.0182 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UIACH-O - RVO:68081715 Anotace The chemiresistor is the sensor, which changes its resistivity with change of adjacent chemical environment [1,2]. In this case it is the gold thin film sensor [3] interacting with thiols in liquid phase. When thiolated molecule adsorb on the gold surface and building self-assembled monolayer [4,5], there is established the covalent bond between the sulphur and gold atom with 50% of C-C bond strength [6]. Covalently bonded gold atoms do not participate on electric conduction anymore, thus gaining the resistivity of the layer. When the gold layer is sufficiently thin (<80nm), this effect become evident and the difference between clear and completely saturated surface can be represented by shift in resistance up to 5%. The device self was constructed as a microfluidic apparatus with four sensing elements arranged in the Wheatstone bridge to exclude influence of the temperature coefficient of resistivity. In ideal case, when the bridge is balanced, the voltage between the sensing nodes is zero. Only one element was used at a time. Sample was fed into the channels by quartz capillaries. The chip consists of two parts – glass plate with sensors and PDMS part with channels bonded together with aid of plasma activation. We tested dynamic range of the device by aliquote series of thiolated and non-thiolated compounds. The thiolated compounds were chosen the glutathione and cysteine, the non-thiolated were used tripeptide Gly-Pro-Glu and β-alanine because of their similarity to their thiolated counterparts. Pracoviště Ústav analytické chemie Kontakt Iveta Drobníková, drobnikova@iach.cz, Tel.: 532 290 234 Rok sběru 2014
Počet záznamů: 1