Synthesis and characterization of copper hexacyanoferate nanoparticles and its application in Glucose Biosensor and electrochromics electrodes / Síntese e caracterização de nanopartículas de hexacianoferrato de cobre e sua aplicação em biossensores de glicose e eletrodos eletrocrômicos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

In this work, the sonochemical synthesis and the characterization of copper hexacyanoferrate nanoparticles for producing ultra thin films with controlled thickness is reported. Due to its nanometric structure and the excess of superficial negative charges, the proposed immobilization methods were the electrostatic deposition layer by layer (LBL), using the PAH as a positive polyelectrolyte Poly(allylamine hydrochloride) and the electrophoretic deposition which uses an electric field in order to attract the charged particles to the electrode surface. The study of the electrodes modified by the copper hexacyanoferrate nanoparticles was focused in its electrocathalytic and electrochromic properties. Copper hexacianoferrate (HexFeCu) presents some interesting properties like the electrocatalytic reduction of hydrogen peroxide at low potential conditions with the advantage of being electroactive in media containing Na+. The utilization of this nanometrically-structured compound provides a very large surface area, enhancing its catalytic properties. Besides its use in amperometric biosensors, it was also possible its use in electrochromic devices because color changes observed during redox cycles, demonstrating high reversibility, electrochromic durability and due to high adherence of nanoparticles to the ITO electrode.

ASSUNTO(S)

hexacianoferrato de cobre nanoparticles biossensores electrochromic dispositives nanopartículas dispositivos eletrocrômicos biosensors copper hexacyanoferrate

ACESSO AO ARTIGO

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