Plasmonic polyaniline/gold nanorods hybrid composites for selective NIR photodetection: Synthesis and characterization
| Autor: | Roberto Cingolani, Gaser N. Abdelrasoul, Francesca Pignatelli, Athanassia Athanassiou, Ioannis Liakos |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Nanocomposite Materials science Mechanical Engineering 02 engineering and technology Polymer Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Metal chemistry.chemical_compound X-ray photoelectron spectroscopy chemistry Mechanics of Materials visual_art Polyaniline Ceramics and Composites visual_art.visual_art_medium Nanorod Fourier transform infrared spectroscopy Composite material 0210 nano-technology |
| Zdroj: | Composites Part B: Engineering. 149:178-187 |
| ISSN: | 1359-8368 |
| DOI: | 10.1016/j.compositesb.2018.05.015 |
| Popis: | In this study, we present the development of polyaniline/gold nanorod nanocomposites and the effect of the nanorods' aspect ratio and concentration on the overall electrical conductivity of nanocomposite systems. The electrical characterization showed that at the same atomic gold concentration, the conductivity of the nanocomposites increased by about 14% after increasing the gold nanorods' aspect ratio from 2.9 to 3.8. Furthermore, the conductivity of the nanocomposites increases linearly with the concentration of atomic gold, keeping the nanorods' aspect ratio stable, due to increasing the metallic content. The interaction between polyaniline and gold nanorods was investigated by FTIR, micro Raman, and XPS spectroscopic techniques, indicating the delocalization of the charges across the polymer chains induced by the incorporation of the nanorods. The interaction most likely occurs through the imine nitrogen of the polymer's backbone. The homogenous distribution of the gold nanorods in the polyaniline matrix was verified by TEM. Furthermore, the selective photosensitivity of the developed nanocomposites to NIR light was examined, and an increase in their current density was detected when the nanocomposites were irradiated at the wavelength that coincides with the longitudinal plasmonic resonance absorption of the incorporated nanorods. We foresee applications of the developed nanocomposites in numerous optoelectronic sectors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect