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Self assembled monolayer of ethanthiol on gold surfaces by Quartz Crystal Microbalance

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Cimpoca, G.V. Popescu, I.V., Dulama, I.D., Radulescu, C., Bancuta, I. Cimpoca, M. Cernica, I. Schiopu, V. Danila, M. Gavrila, R.

Editorial: IEEE Xplore Digital Library, IEEE CNF , IEEE Journal - Procedings, CAS 2009 International, Semiconductor Conference 2009, vol. 1, p.135-138, 2009.


Self-assembled monolayer (SAM) techniques offer a new strategy for the immobilization of antibodies, antigens and DNA on the surface of quartz crystal electrodes. The quartz crystal microbalance (QCM) system provides a unique opportunity to monitor, in-situ and in real-time, the rate of adsorption of ethanthiol onto gold. The change in frequency resulting from the adsorption of ethanthiol molecules onto the gold electrode of a QCM crystal allows direct measurement of the rate of formation of Self Assembled Monolayer (SAMs). The IR spectroscopy with attenuated total reflectance (ATR) confirms the formation of the Au-thiolate bonds in the CH stretching region.

Cuvinte cheie: QCM, etantiol, sensor // QCM, ethanthiol, sensor