Laser ablation by MAPLE at cryogenic conditions to deposition of biodegradable polymer

Waldemar Mroz 2Miroslaw Jelinek 3Janusz Kasperczyk 4Sylwia Burdyńska 2Anna Janus 1Bogusław Major 1

1. Polish Academy of Sciences, Institute of Metallurgy and Materials Sciences (IMIM PAN), Reymonta 25, Kraków 30-059, Poland
2. Military University of Technology, Institute of Optoelectronic (MUT), Wołoska, Warszawa 02-507, Poland
3. Czech Academy of Sciences, Institute of Physics, Na Slovance 2, Prague 182-21, Czech Republic
4. Polish Academy of Sciences, Centre of Polymer Chemistry (CCHPPAN), Curie-Skłodowska 34, Zabrze 41-800, Poland

Abstract

Matrix Assisted Pulsed Laser Evaporation (MAPLE method) is based on a laser ablation at cryogenic conditions of target comprising the dissolved polymer in an optically absorbing solvent with a high vapor pressure, chosen especially. Application of MAPLE method is performed for ablation of a biodegradable Glycolid/L-Lactyl copolymer. Chloroform was used as a solvent. The frozen target by liquid nitrogen was subjected to ablation using KrF excimer laser with energy density varied in the range: 0.1 to 0.3 J/cm2. Titanium alloy Ti6Al4V, austenitic stainless steel 18-8 and polycrystalline silicon were used as substrates. Variation of surface morphology in respect to energy density is studied with application of atomic force microscopy (AFM) and environmental scanning electron microscopy (ESEM). Copolymer structure of deposited layers was subjected to examination using infrared spectroscopy (FTIR). Characteristic absorption FTIR patterns for group consisting polymer under examination are found after deposition. The applied fluencies for ablation suggest that the most uniform microstructure is achieved for fluency of 0.2 J/cm2. The stated deviations in absorption patterns could be caused by variation in ordering as well as differentiation in the thickness of deposited layers. Micro-calorimetric examinations of crystallization temperature of copolymer are in progress.

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Presentation: Poster at E-MRS Fall Meeting 2006, Symposium D, by Bogusław Major
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-08 09:40
Revised:   2014-10-06 14:04
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