Some Recent Designs and Developments of Screen‐Printed Carbon Electrochemical Sensors/Biosensors for Biomedical, Environmental, and Industrial Analyses

Hart, John P.; Crew, Adrian; Crouch, Eric; Honeychurch, Kevin C.; Pemberton, R. M.

doi:10.1081/al-120030682

Cited by 216 publications

(89 citation statements)

References 113 publications

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“…126 The group of Hart reviewed the design and fabrication of electrochemical sensors and biosensors based on screen-printed electrodes and their applications (122 citations). 127 Ju and Zhao reviewed the principles of electrochemical biosensors for DNA analysis with emphasis on the enhancement of their selectivity and sensitivity (110 references). 128 Kerman, Kobayashi and Tamiya reviewed recent trends and challenges in the electrochemical detection of DNA hybridization.…”

Section: Reviewsmentioning

confidence: 99%

Electrochemical Sensors

2006

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Section: Reviewsmentioning

confidence: 99%

Electrochemical Sensors

2006

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Section: Introductionmentioning

confidence: 99%

“…5 Screen-printed electrodes (SPE) are characterized by low unit cost, high precision, and a wide range of designs (either as arrays or as single electrodes) and can be used as whole electrode systems (reference, working, and counter electrode), maintaining adequate reproducibility. [6][7][8] The main advantage of SPE over conventional electrodes is that problems associated with carry-over and surface fouling are avoided as they are normally used only once and then discarded, 9,10 whereas conventional solid electrodes usually depend on very reproducible manual polishing procedures.Printing inks used for preparation of screen-printed carbon electrodes (SPCE) contain mineral binder, solvent and conductive carbon material. It is known that some components can strongly influence the electrochemical properties of the electrode substrate, as changes in the electron transfer resistance.…”

mentioning

confidence: 99%

A novel disposable electrochemical microcell: construction and characterization

Ferreira

Daniel

Bertotti

et al. 2008

J. Braz. Chem. Soc.

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Este trabalho apresenta uma técnica alternativa de microfabricação para construção de microcélulas eletroquímicas descartáveis contendo os eletrodos de trabalho, auxiliar e de referência em um único dispositivo. Trata-se de um processo simples no qual a termo-transferência de máscaras de toner sobre superfícies de ouro obtidas a partir de discos compactos graváveis (CD-R) definem o formato dos eletrodos (contornos). Numa etapa seguinte, o formato é manualmente coberto com tinta usando uma caneta de retroprojetor. A superfície de ouro não protegida pela tinta é convenientemente removida (corrosão química) e a tinta, por sua vez, é facilmente removida com etanol gerando superfícies de ouro sem contaminação. A área final e reprodutível dos eletrodos é definida pela termo-transferência de uma segunda máscara de toner. O eletrodo de referência é obtido por meio de uma deposição manual de cola de prata sobre uma banda de ouro. As microcélulas foram eletroquimicamente caracterizadas usando as técnicas de voltametria cíclica, voltametria linear e voltametria de onda quadrada e várias espécies eletroativas como sistemas modelo. A reprodutibilidade de área dos eletrodos para diferentes microcélulas foi estudada e um desvio-padrão relativo melhor do que 1,0% foi obtido. As microcélulas descartáveis foram usadas com sucesso para a análise de amostras em volumes menores que 200 µL demonstrando boa estabilidade e reprodutibilidade (RSD menor que 2,0%). Essas microcélulas também foram avaliadas para a quantificação de paracetamol e dipirona em formulações farmacêuticas.An alternative technique for the fabrication of disposable electrochemical microcells containing working, reference and auxiliary electrodes on a single device is reported. The procedure is based on thermal-transfer of toner masks onto CD-R (recordable compact discs) gold surfaces to define the layout of the electrodes (contour). In a subsequent step, the layout is manually painted with a permanent marker pen. The unprotected gold surface is conveniently etched (chemical corrosion) and the ink is then easily removed with ethanol, generating gold surfaces without contamination. The final and reproducible area of the electrodes is defined by heat transference of a second toner mask. Silver epoxy is deposited on one of the gold bands which is the satisfactorily used as reference electrode. These microcells were electrochemically characterized by cyclic, linear, and square wave voltammetry, and several electroactive species were used as model systems. The area reproducibility of the electrodes for different microcells was studied and a relative standard deviation better than 1,0% (n = 10) was obtained. Disposable electrochemical microcells were successfully used in analysis of liquid samples with volumes lower than 200 µL and good stability and reproducibility (RSD less than 2.0%) were achieved. These microcells were also evaluated for quantification of paracetamol and dipyrone in pharmaceutical formulations.Keywords: disposable electrochemical microcell, microfabri...

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“…Prussian Blue films have also been found to have an electrocatalytic effect on the oxidation of AA [7][8][9] and they have also been used for its determination [10]. An amperometric flow-injection sensor for AA was developed using a Prussian Blue film on a glassy carbon electrode; such a sensor was stable, sensitive and selective and had a low detection limit (2.5 lM) in acidic media [11].…”

Section: Introductionmentioning

confidence: 99%

A new, improved sensor for ascorbate determination at copper hexacyanoferrate modified carbon film electrodes

2005

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A new, improved sensor for the electrocatalytic determination of ascorbate has been developed that has both a low applied operating potential and a low detection limit. The sensor was constructed by depositing copper hexacyanoferrate film either electrochemically or chemically onto carbon film electrode, and it was then characterised by cyclic voltammetry and electrochemical impedance spectroscopy. Chemically deposited films were shown to be the best for ascorbate determination and were used as an amperometric sensor at +0.05 V versus SCE to determine ascorbate in wines and juice. The linear range extended to 5 mM with a limit of detection of 2.1 lM, the sensor was stable for more than four months, and it could be used continuously for at least 20 days.

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Some Recent Designs and Developments of Screen‐Printed Carbon Electrochemical Sensors/Biosensors for Biomedical, Environmental, and Industrial Analyses

Cited by 216 publications

References 113 publications

Electrochemical Sensors

Electrochemical Sensors

A novel disposable electrochemical microcell: construction and characterization

A new, improved sensor for ascorbate determination at copper hexacyanoferrate modified carbon film electrodes

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