Gold Electrodes from Recordable CDs

Abstract

Gold electrodes are widely used in electrochemistry and electroanalytical chemistry. The notable performance when used in stripping analysis of many ionic species and the extraordinary affinity of thio compounds for its surface make these electrodes very suitable for many applications. This paper reports a simple and novel way to construct gold electrodes (CDtrodes) using recordable CDs as the gold source. The nanometer thickness of the gold layer of recordable disks (50-100 nm) favors the construction of band nanoelectrodes with areas as small as 10(-6) cm2. The plane surface can be easily used for the construction of conventional-sized gold electrodes for batch or flow injection analysis or even to obtain electrodes as large as 100 cm2. The low price of commercial recordable CDs allows a "one way use". The evaluation and applicability of these electrodes in the form of nanoelectrodes, in batch and associated with flow cells, are illustrated in this paper.

Electrochemical sensors: a powerful tool in analytical chemistry

“…Nevertheless, the most successful works in these area are published by Angnes and co-workers. 142,143 These authors have described a notable performance of gold electrodes constructed from recordable CDs. The versatile, economic and very sensitive electrodes are applied for quantification of several organic and inorganic compounds.…”

Construção e aplicação de um minissensor de filme de bismuto utilizando materiais de baixo custo para determinações voltamétricas in loco

“…21,30,[35][36][37][38] CD-Rs possuem em sua constituição uma película metálica de ouro ou prata que, de forma adequada, são expostas e transformadas em eletrodos sólidos destes metais. A aplicação destes dispositivos já foi relatada em diversos trabalhos, tanto para a quantificação de traços de metais 35,36 como para a análise de fármacos.…”

“…21,30,[35][36][37][38] CD-Rs possuem em sua constituição uma película metálica de ouro ou prata que, de forma adequada, são expostas e transformadas em eletrodos sólidos destes metais. A aplicação destes dispositivos já foi relatada em diversos trabalhos, tanto para a quantificação de traços de metais 35,36 como para a análise de fármacos. 37,38 Sendo assim, propõe-se a construção de um minissensor descartável a partir de placas contendo filme de cobre, [39][40][41][42] utilizadas para a confecção de circuitos impressos, como substrato para a eletrodeposição de bismuto (eletrodo de trabalho) e prata (pseudorreferência) para determinações in loco de Pb(II) e Paraquat em águas naturais utilizando um potenciostato portátil.…”

A novel disposable electrochemical microcell: construction and characterization

“…Gold films can be inexpensively obtained from commercial recordable compact discs (CD-Rs), as proposed by Angnes et al 25 The so-called Au-CDtrodes exhibit a gold uniform film due to the efficient CD-R fabrication process, with highly reproducible thickness, orientation and roughness. 26 The literature has reported their application in batch and flow cells, at bare or modified surfaces.…”

“…[20][21][22][23][24] The quality of the deposited metal film depends on factors such as the use of clean rooms, previous deposit of another material for better adhesion and appropriate pressure control. However, sputtering coating equipments and clean rooms are usually not available in a common analytical laboratory and a simpler approach would be highly desirable.Gold films can be inexpensively obtained from commercial recordable compact discs (CD-Rs), as proposed by Angnes et al 25 The so-called Au-CDtrodes exhibit a gold uniform film due to the efficient CD-R fabrication process, with highly reproducible thickness, orientation and roughness. 26 The literature has reported their application in batch and flow cells, at bare or modified surfaces.…”