Doped Poly(3-hexylthiophene) Coatings onto Chitosan: A Novel Approach for Developing a Bio-Based Flexible Electronic
| Autor: | Felipe A. Angel, Angel Leiva, Loïk Gence, Galder Kortaberria, Sebastián Bonardd, César Saldías, Natalia Morales |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Scanning electron microscope Nanoparticle Thiophenes 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Chitosan chemistry.chemical_compound Chlorides Coated Materials Biocompatible Coating Elastic Modulus Materials Testing General Materials Science Pliability Conductive polymer Spin coating Doping Electric Conductivity 021001 nanoscience & nanotechnology Gold Compounds 0104 chemical sciences chemistry Chemical engineering Attenuated total reflection Wettability engineering Electronics 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 12:13275-13286 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.9b21289 |
| Popis: | Conductive and flexible bio-based materials consisting of chitosan films coated with conductive poly(3-hexylthiophene) (P3HT) were prepared. Thermal, optical, mechanical, morphological, wettability, and conductive properties were analyzed. In a very simple and effective method of chitosan film modification, a controlled volume of a P3HT solution was deposited onto a previously formed chitosan film, assisted by the spin coating method. Later, P3HT-coated chitosan films were doped by simple contact with an aqueous solution of HAuCl4. The use of HAuCl4 becomes attractive because the reports on the doping process in this type of material using this reagent are still scarce and recent to date. In addition, since this acid is a well-known metal nanoparticle precursor, its use opens new future perspectives for these materials into new applications. The effect of P3HT concentration and doping times on film properties was studied. Attenuated total reflectance spectroscopy and UV-Vis spectroscopy allowed us to demonstrate that the presence of the P3HT coating and its doping induce significant changes in the vibrational modes and optoelectronic properties of samples. Additionally, the images obtained by scanning electron microscopy showed a well-distributed and homogeneous coating on the surface of chitosan films. Measured conductivity values of doped film samples fall in the range from 821.3 to 2017.4 S/m, representing, to the best of our knowledge, the highest values reported in the literature for chitosan/chitin-based materials. Indeed, these values are around or even higher than those obtained for some materials purely consisting of conductive polymers. |
| Databáze: | OpenAIRE |
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