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Biomolecular papain thin films grown by matrix assisted and conventional pulsed laser deposition: A comparative study

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4 Author(s)
Gyorgy, E. ; Consejo Superior de Investigaciones Cientificas, Centre d’Investigacions en Nanociència i Nanotecnologia, (CSIC-CIN2), Campus UAB, 08193 Bellaterra, Spain ; Perez del Pino, A. ; Sauthier, G. ; Figueras, A.

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Biomolecular papain thin films were grown both by matrix assisted pulsed laser evaporation (MAPLE) and conventional pulsed laser deposition (PLD) techniques with the aid of an UV KrF* (λ=248 nm, τFWHM≅20 ns) excimer laser source. For the MAPLE experiments the targets submitted to laser radiation consisted on frozen composites obtained by dissolving the biomaterial powder in distilled water at 10 wt % concentration. Conventional pressed biomaterial powder targets were used in the PLD experiments. The surface morphology of the obtained thin films was studied by atomic force microscopy and their structure and composition were investigated by Fourier transform infrared spectroscopy. The possible physical mechanisms implied in the ablation processes of the two techniques, under comparable experimental conditions were identified. The results showed that the growth mode, surface morphology as well as structure of the deposited biomaterial thin films are determined both by the incident laser fluence value as well as target preparation procedure.

Published in:

Journal of Applied Physics  (Volume:106 ,  Issue: 11 )

Date of Publication:

Dec 2009

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