Electrophoretic deposition of Au@PEDOT nanoparticles towards the construction of high-performance electrochromic electrodes
| Autor: | Raquel Vichessi, Tatiana Augusto, Ângela A. Teixeira Neto, Érico Teixeira Neto, Marcio Vidotti, Susana I. Córdoba de Torresi |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
ELETROQUÍMICA Renewable Energy Sustainability and the Environment Analytical chemistry Nanoparticle Surfaces Coatings and Films Electronic Optical and Magnetic Materials Electrophoretic deposition symbols.namesake PEDOT:PSS Chemical engineering Electrochromism Electrode Scanning transmission electron microscopy symbols Raman spectroscopy Layer (electronics) |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2013.07.031 |
| Popis: | High performance electrochromic electrodes prepared by the electrophoretic deposition of Au@PEDOT (gold@poly (3,4-ethylenedioxythiophene)) nanoparticles were characterized. A detailed study was performed using scanning transmission electron microscopy (STEM) combined with a chemical analysis at the nanometer level showing core–shell structures with sizes ranging from 2 to 8 nm. X-ray diffraction and Raman experiments were also performed. The modified electrodes present homogeneous surfaces with increased roughness, leading to excellent electrochromic properties like a high chromatic contrast with an electrochromic efficiency of ca. 300 C −1 cm 2 with a response time of approximately 60–70 ms for 90% of coloration. The fast switching was related to the location of the solid state electrochromic reaction, the very thin PEDOT layer surrounding the Au core of the nanoparticles. |
| Databáze: | OpenAIRE |
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