Reflection and absorption studies on polypyrrole films electrochemically prepared with different electrolyte types

Solid State Spectroelectrochemistry of Redox Reactions in Polypyrrole/Oxide Molecular Heterojunctions

“…A significant challenge in determining the mechanism of memory devices is the difficulty of monitoring structure and dynamics of very thin (<50 nm) molecular layers covered by opaque metallic “contacts” . Optical absorbance spectroscopy is an attractive method to probe chemical states within PPy layers since the UV–vis-NIR absorbance strongly depends on the oxidation state, conjugation, and chemical bonding within PPy − and can nondestructively probe structural changes within functioning devices. The well established field of spectroelectrochemistry has been used previously on PPy layers in an electrolyte solution, allowing complementary structural and electrochemical analysis. ,, Applying the fundamentals of spectroelectrochemistry to solid state devices, we previously showed that in situ optical absorbance spectroscopy can monitor the chemical structure of a 2–5 nm thick molecular layer incorporated in a solid state junction .…”

"Desenvolvimento de interfaces eletroquímicas à base de nanocompósitos de poli(Pirrol) e xerogel lamelar de pentóxido de vanádio"

“…As três técnicas mais empregadas para a formação de filmes de poli(pirrol) são a voltametria cíclica, a galvanostática e a potenciostática. Todas as três formam, em solvente e com eletrólito adequados [196][197][198][199][200][201] [202]. [214] e "clusteres" trigonais de Ru-Acetato, com finalidades eletrocatalíticas [215,216] e de conversão de energia [217,218].…”