Optical and Electrophysical Properties of Nanocomposites Based on PEDOT : PSS and Gold/Silver Nanoparticles
| Autor: | E. Sarantopoulou, A. E. Pochtenny, I. N. Kukhta, A. V. Kukhta, A. V. Misevich, E. M. Semenova, S.A. Vorobyova |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Nanocomposite
Materials science Absorption spectroscopy current–voltage characteristics strong electric fields electrical conduction of PEDOT Nanotechnology Activation energy Condensed Matter Physics ilms based on the polymer PEDOT the nanocomposite films Silver nanoparticle the absorption spectra Electronic Optical and Magnetic Materials electric field the macroscopic level for the fields Chemical engineering PEDOT:PSS Colloidal gold Electric field Electroactive polymers the microscopic level for the fields voltage characteristics |
| Popis: | The absorption spectra in the visible region and current–voltage characteristics in a wide range of electric fields have been investigated at the macroscopic level (planar structures) and at the microscopic level (using a conductive atomic force microscope) in films based on the electroactive polymer PEDOT : PSS and gold/silver nanoparticles (PEDOT : PSS + Au/AgNP). It has been shown that the behavior of the current– voltage characteristics of the nanocomposite films depends significantly on the electric field strength. It has been found that the introduction of gold nanoparticles into PEDOT : PSS in weak electric fields leads to an increase in the bulk conductance by almost two orders of magnitude (due to donor–acceptor interactions), a 50% decrease in the conduction activation energy, and an increase in the sensitivity to adsorbed oxygen. It has been demonstrated that electrical conduction of PEDOT : PSS + AuNP films is provided by hopping charge transfer both in the system of intrinsic localized states and in the system of impurity states of adsorbed oxygen. In strong electric fields, the current–voltage characteristics exhibit a different behavior in the forward and reverse scanning modes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|