[seminar] Seminar na IF-u, 26. studenoga 2013. u 11:00h

[Osor Barisic]

ZAJEDNIČKI SEMINAR 

Hrvatskog biofizičkog društva i Instituta za fiziku 

26. studeni 2013. (utorak) u 11:00 sati (točno) 

Institut za fiziku, Bijenička cesta 46, Predavaonica III krilo 







Aleš Doliška 

University of Maribor, Laboratory for Characterization and Processing of Polymers 





Quartz Crystal Microbalance with Dissipation monitoring (QCM-D) and its application in surface characterization 



Model films are getting more and more important due to very well defined properties regarding to the surface chemistry. Such model systems are suitable for studies of surfaces and their interaction with different functional groups. Characterizations of such model films are easy to perform and techniques such as quartz crystal microbalance (QCM) can be used for in situ adsorption studies. Quartz crystal microbalance with dissipation monitoring (QCM-D) is one of a few techniques that give direct information on the adsorption process in situ . It is based on the change in resonance frequency of a thin AT-cut piezoelectric quartz crystal disk that oscillates in the shear mode when AC voltage is applied across electrodes. The resonant frequency changes with the mass deposited on the crystal surface, rendering QCM a very sensitive mass sensor. Due to its high resolution, it is a powerful device in a variety of technological applications and it is of great importance for adsorption studies in liquid environments. Some practical examples and possible use of QCM-D will be pointed out. After adsorption, the treated model surfaces (model PET films, cellulose model films …) could be characterized with AFM imaging or other surface techniques such as XPS or ATR-FTIR. 



* * * 



Aleš Doliška received his Ph.D. in physical chemistry from Karl Franzens University Graz, Austria where he worked with surface analytic techniques, such as Goniometry, Tensiometry, AFM and QCM. His current research work in Maribor is focused on materials for biomedical application and polymer materials surface characterizationand addresses preparation of medical textiles, i.e. wound dressings for specific medical treatment in the framework of Centre of Excellence PoliMaT. He also specialized as analytical chemist: Capillary electrophoresis, Potentiometry, Spectrophotometric methods (UV-VIS, AAS, FTIR), AOX and TOC determination and Gas Chromatography. 



http://lcpp.um.si/ 
http://www.polimat.si/ 


http://www.epnoe.eu/Members/Academic-members/Univ.-Maribor 









Voditelji seminar a IF-a: Nikša Krstulović i Osor Bari šić 


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