1. Thermal behavior and matrix-assisted pulsed laser evaporation deposition of functional polymeric materials thin films with potential use in optoelectronics
- Author
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Anca Nedelcea, Catalin Constantinescu, Andrei Rotaru, Maria Dinescu, Axe 2 : procédés plasmas et lasers (SPCTS-AXE2), Science des Procédés Céramiques et de Traitements de Surface (SPCTS), Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), National Institute for Plasma and Radiation Physics (NILPRP), and Centre de recherche
- Subjects
Materials science ,Silicon ,Mechanical Engineering ,chemistry.chemical_element ,[CHIM.MATE]Chemical Sciences/Material chemistry ,Condensed Matter Physics ,Fluence ,Evaporation (deposition) ,Pulsed laser deposition ,[SPI.MAT]Engineering Sciences [physics]/Materials ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Mechanics of Materials ,Polymer chemistry ,Polyaniline ,Deposition (phase transition) ,General Materials Science ,Thermal stability ,Thin film ,ComputingMilieux_MISCELLANEOUS - Abstract
Thermal behavior studies of several polymers, i.e. polyvinyl chloride (PVC), polyacrylic acid (PAA), and polyaniline (PAni), together with thin film deposition by a MAPLE technique, are presented. Thermal stability studies are important before attempting any laser-assisted processing of such materials, as this provides a better understanding of their molecular behavior, to assess the evolution and dynamics of the deposition. Thin films were grown on silicon substrates by means of matrix-assisted pulsed laser evaporation (MAPLE) using a Nd:YAG laser (266 and 355 nm, 7 ns pulse duration). Above the fluence of ~0.7 J/cm 2 the polymeric films are highly non-uniform due to the transferring of matrix-droplets and/or clusters from the target. At low fluence, typically between 0.1 and 0.5 J/cm 2 , the polymeric films are intact; the surface morphology is substantially improved and there are no measurable traces of the matrix molecules in the films. The important question of polymeric molecules integrity in the films with respect to that of the targets is discussed, in relation to their properties, and compared to data available in the literature.
- Published
- 2015
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