Mendez-Lopez, M. and Moreno-Serna, V. and Inostroza-Rivera, R. and Ramos, A. and Molero, L. and Bonardd, S. and Diaz Diaz, D. and Leiva, A. and Saldias, C. (2018) Optical and electronic activities of biobased films of chitosan/POTE containing gold nanoparticles: Experimental and theoretical analyses. EUROPEAN POLYMER JOURNAL, 108. pp. 235-249. ISSN 0014-3057, 1873-1945
Full text not available from this repository. (Request a copy)Abstract
Biobased films consisting of blends of chitosan with poly(octanoic acid 2-thiophen-3-yl-ethyl ester) (POTE), a conducting polymer, and gold nanoparticles (AuNPs) were prepared, and their thermal, morphological and surface potential properties were studied. POTE was dissolved in THE and mixed with an acidified aqueous solution containing chitosan to obtain chitosan/POTE (CS/POTE) films by solution casting. To produce gold nanoparticles in the CS/POTE films (i.e., CS/POTE/AuNP films), an aqueous solution of KAuCl4 salt at fixed concentration was added to the initial chitosan solution. The fabricated biobased films were characterized by spectroscopic techniques (FT-IR and UV-visible), thermogravimetry, contact angle analysis, polarized light microscopy (PLM), field emission scanning electron microscope (FE-SEM) and scanning Kelvin probe force microscopy (SKPFM). The effects of varying POTE composition and the presence of gold nanoparticles in the films were analyzed. For example, the results indicated the existence of interactions between chitosan and POTE, and LPM studies revealed a predominantly amorphous nature of these biobased films. In addition, the optical and surface potential behaviors of the films were examined by UV visible and KPFM techniques. From the UV visible spectra, the optical band gaps were estimated for the samples, and their surface potential maps exhibited differences according to the composition of POTE and the presence of AuNPs. Finally, theoretical electronic calculations provided insight into the contributions of POTE and gold nanoparticles to the electronic activity of the films.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ACID 2-THIOPHENE-3-YL-ETHYL ESTER; CONDUCTING POLYMERS; SURFACE-TENSION; GREEN SYNTHESIS; SOL-GEL; BLENDS; COMPOSITES; POLYETHYLENE; SCAFFOLD; CHITIN; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie > Arbeitskreis Prof. Dr. David Díaz Díaz |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 10 Oct 2019 07:21 |
| Last Modified: | 10 Oct 2019 07:21 |
| URI: | https://pred.uni-regensburg.de/id/eprint/13573 |
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