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Laser Processing of Polyethylene Glycol Derivative and Block Copolymer Thin Films

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

Autori: R. Cristescu, C. Cojanu, A. Popescu, S. Grigorescu, L. Duta, O. S. Ionescu, D. Mihaiescu, T. Buruiana, A. Andronie, I. Stamatin, I.N. Mihailescu, D. B. Chrisey

Editorial: Applied Surface Science, 255, p.5605-5610, 2009.


Wereport the deposition byMAPLE of: (i) a novel polyethylene glycol derivative with carboxyl functional
groups and (ii) a block copolymer: poly(ethylene glycol)methyl ether-block-poly(caprolactone)-blockpoly(
ethylene glycol)methyl ether. We used a KrF* excimer laser source (l = 248 nm, t = 25 ns, n = 5 Hz).
The laser fluence was set within the 200–700 mJ/cm2 range. The deposited thin films have been
investigated by FTIR and AFM.We have concluded that the main functional groups of starting materials
are present in the transferred film. We also examined the influence of laser fluence on both thin film
structure and morphology.

Cuvinte cheie: Controlled drug release, Porous polymers, Thin films, Matrix assisted pulsed laser evaporation