| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:23 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2006 Meeting
Section: Polymer Physics
Title:
Thin films of polyaniline emeraldine salt (PAni-ES) deposited by matrix asissted pulsed laser evaporation (MAPLE)
Authors:
C. Constantinescu, C. Z. Dinu, A. Purice, N. Scarisoreanu, A. Moldovan, M. Bercu, M. Dinescu
Affiliation:
National Institute for Laser, Plasma and Radiation Physics,
P.O. Box MG 16, RO - 077125 Magurele, Bucharest, Romania
E-mail
kataluzz@yahoo.com
Keywords:
polyaniline, MAPLE, laser processing, thin film
Abstract:
Recent advances in low dimensional polyaniline structures as nanoshells and nanofibers open new prospective for chemical gas sensors applications. The methods of obtaining polyaniline in the form of thin films and/or nanostructures are complicated and request special physical and chemical treatment, both on the substrates surface and for the polymer itself.
In this paper we applied matrix assisted pulsed lased evaporation (MAPLE) for obtaining thin films and nanostructures of polyaniline. In MAPLE, the target consisting of the material (usually 0.2–3 wt%) dissolved in a solvent is frozen solid and it is evaporated using a laser. The material is collected on a substrate, located parallel to the target at few cm of it and the solvent is eliminated through the vacuum system. With respect to pulsed laser deposition, MAPLE is a gentle deposition technique for polymers and organic films, the laser energy is absorbed only by the solvent, therefore the bond dissociation and chemical modifications can be avoided.
The structures have been characterized by Atomic Force Microscopy, Dielectric Spectroscopy and Fourier Transform Infrared Spectroscopy. The influence of different solvents used and of the laser parameters (wavelengths and fluence) on the polyaniline structures composition and properties has been investigated.
|
|
|
|