Shellac Thin Films Obtained by Matrix-Assisted Pulsed Laser Evaporation (MAPLE)
Source abstract
Abstract
We report on the fabrication of shellac thin films on silicon substrates by matrix-assisted pulsed laser evaporation (MAPLE) using methanol as matrix. Very adherent, dense, and smooth films were obtained by MAPLE with optimized deposition parameters, such as laser wavelength and laser fluence. Films with a root mean square (RMS) roughness of 11 nm measured on 40 × 40 µm2 were obtained for a 2000-nm-thick shellac film deposited with 0.6 J/cm2 fluence at a laser wavelength of 266 nm. The MAPLE films were tested in simulated gastric fluid in order to assess their capabilities as an enteric coating. The chemical, morphological, and optical properties of shellac samples were investigated by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and atomic force microscopy (AFM).
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Research context
OpenAlex topics: Laser-Ablation Synthesis of Nanoparticles · Laser-induced spectroscopy and plasma · Laser Material Processing Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
National Institute for Lasers, Plasma, and Radiation Physics, 409 Atomistilor Street, P.O. Box MG-16, RO-077125 Magurele, Romania
Faculty of Sciences, University of Craiova, RO-200585 Craiova, Romania
CNRS, IRCER—UMR 7315, University of Limoges, F-87000 Limoges, France
Funding
Unitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si Inovarii
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