Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Surface nano/micro functionalization of PMMA thin films by 157 nm irradiation for sensing applications
Δημιουργός/Συγγραφέας:	[EL] Σαραντοπούλου, Ευαγγελία[EN] Sarantopoulou, Evangelia [EL] Κόλλια, Ζωή[EN] Kollia, Zoe [EL] Κεφαλάς, Αλκιβιάδης Κωνσταντίνος[EN] Cefalas, Alciviadis Constantinos Manoli, K. Sanopoulou, M. Goustouridis, D. Chatzandroulis, S. Raptis, I.
Εκδότης:	Elsevier BV, North-Holland
Τόπος έκδοσης:	AMSTERDAM
Ημερομηνία:	2008-01-15
Γλώσσα:	Αγγλικά
ISSN:	0169-4332
DOI:	10.1016/j.apsusc.2007.07.138
Περίληψη:	Laser irradiation at 157 nm of polymethylmethacrylate (PMMA) thin films induces major variations of polymer film thicknesses from sorption (absorption/desorption) of methanol and ethanol analytes in the gas phase as much as 400%, in comparison to the film thickness variation of the non-irradiated areas. The structural changes of irradiated areas involve scission of polymeric chains, cross-linking and formation of new bonds. In addition, 157 run induces surface and volume morphological changes in the nano/micro domain, with different shapes, depending on the irradiation conditions. The reversibility of the sorption processes suggests that the polymer swelling has its origin at the tendency of the system to increase its volume during sorption. The internal forces from sorption are higher than the weak dipole interactions between the polymer and the analytes and they are amplified following 157 nm irradiation. A simple qualitative model explains adequately the experimental results. 157 nm laser treatment forms the basis to engineer a novel class of polymer sensor arrays with enhanced detection efficiency of liquid/gas analytes.
Τίτλος πηγής δημοσίευσης:	Applied Surface Science (formerly Known as Applications of Surface Science)
Τόμος/Κεφάλαιο:	254
Τεύχος:	6
Σελίδες:	1710-1719
Θεματική Κατηγορία:	[EL] Χημεία (Γενικά)[EN] Chemistry (General) [EL] Επιστήμη (Γενικά)[EN] Science (General) [EL] Τεχνολογία (Γενικά)[EN] Technology (General) [EL] Φυσική[EN] Physics
Λέξεις-Κλειδιά:	PMMA swelling VUV polymer surface treatment polymer sensor sorption surface modification hydrophobic Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2007 Elsevier B.V. All rights reserved.
Ηλεκτρονική διεύθυνση περιοδικού (link) :	http://www.elsevier.com/locate/apsusc
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο