Filmes de metal-hexacianoferrato: uma ferramenta em química analítica

Mattos, Ivanildo Luiz de; Gorton, Lo

doi:10.1590/s0100-40422001000200010

Cited by 44 publications

(38 citation statements)

References 37 publications

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“…Thin films of materials such as Prussian blue and related materials can be formed on the electrode surface and show interesting properties. 102,[107][108][109][110] Mattos and Gorton 110 have shown that glucose biosensors can be constructed using Prussian blue films, with excellent performance. An example from Stradiotto and coworkers 101,102 of the use of Prussian blue films as an amperometric sensor to determine persulfate anions in hair bleach "booster" is shown in Figure 2.…”

Section: Chemically Modified Electrodesmentioning

confidence: 99%

Electrochemical sensors: a powerful tool in analytical chemistry

Stradiotto¹,

Yamanaka²,

Zanoni³

2003

J. Braz. Chem. Soc.

326

154

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Sensores potenciométricos, amperométricos e condutométricos são sensores eletroquímicos com imensa aplicação nas áreas de meio ambiente, indústria e análises clínicas. O presente trabalho apresenta uma revisão generalizada dos aspectos fundamentais, os desenvolvimento e a contribuição destes sensores na área de química analítica, e reporta alguns aspectos relevantes dos avanços na área de sensores eletroquímicos no Brasil.Potentiometric, amperometric and conductometric electrochemical sensors have found a number of interesting applications in the areas of environmental, industrial, and clinical analyses. This review presents a general overview of the three main types of electrochemical sensors, describing fundamental aspects, developments and their contribution to the area of analytical chemistry, relating relevant aspects of the development of electrochemical sensors in Brazil.

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Section: Chemically Modified Electrodesmentioning

confidence: 99%

Electrochemical sensors: a powerful tool in analytical chemistry

Stradiotto¹,

Yamanaka²,

Zanoni³

2003

J. Braz. Chem. Soc.

326

154

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“…Nickel hexacyanoferrate ͑NiHCNFe͒, 7 cobalt hexacyanoferrate ͑CoHCNFe͒, 8,9 and copper hexacyanoferrate ͑Cu-HCNFe͒ 10 have been used as mediators in oxidase-based biosensors. 11 However, the sensitivities achieved with these materials during H 2 O 2 detection, even in electrolytes containing K + , are much lower than those measured with a Prussian Blue modified electrode.…”

mentioning

confidence: 94%

On the Template Synthesis of Nanostructured Inorganic/Organic Hybrid Films.

Salvador¹,

Alcântara²,

Torresi³

2008

J. Electrochem. Soc.

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Prussian Blue has been introduced as a mediator to achieve stable, sensitive, reproducible, and interference-free biosensors. However, Na + , Li + , H + , and all group II cations are capable to block the activity of Prussian Blue and, because Na + can be found in most human fluids, Prussian Blue analogs have already been developed to overcome this problem. These analogs, such as copper hexacyanoferrate, have also been introduced in a conducting polypyrrole matrix to create hybrid materials ͑copper hexacyanoferrate/polypyrrole, CuHCNFe/Ppy͒ with improved mechanical and electrochemical characteristics. Nowadays, the challenges in amperometric enzymatic biosensors consist of improving the enzyme immobilization and in making the chemical signal transduction more efficient. The incorporation of nanostructured materials in biosensors can optimize both steps and a nanostructured hybrid CuHCNFe/Ppy mediator has been developed using a template of colloidal polystyrene particles. The nanostructured material has achieved sensitivities 7.6 times higher than the bulk film during H 2 O 2 detection and it has also presented better results in other analytical parameters such as time response and detection limit. Besides, the nanostructured mediator was successfully applied at glucose biosensing in electrolytes containing Prussian Blue blocking cations.

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“…Besides Prussian Blue, other metal hexacyanoferrate used as mediators in oxidase based biosensors are copper hexacyanoferrate (CuHCNFe) [5][6][7], cobalt hexacyanoferrate (CoHCNFe) [8][9][10][11] and nickel hexacyanoferrates (NiHCNFe) [12][13][14].…”

Section: E-mail Address: Storresi@iquspbr (Si Córdoba De Torresi)mentioning

confidence: 99%

Polypyrrole/copper hexacyanoferrate hybrid as redox mediator for glucose biosensors

Fiorito

Brett

Torresi

2006

Talanta

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A copper containing Prussian Blue analogue was incorporated into a conducting polypyrrole film. The modified electrode was synthesized through an electrochemical two-step methodology leading to very stable and homogeneous hybrid films. These electrodes were proved to show excellent catalytic properties towards H 2 O 2 detection, with a performance higher than those observed for Prussian Blue and other analogues. Electrochemical impedance spectroscopy experiments demonstrated that the excellent performance of these hybrid films is strongly related to the electronic conductivity of the polymeric matrix that is wiring the copper hexacyanoferrate sites. A glucose biosensor was built-up by the immobilization of glucose oxidase; the sensitivity obtained being higher than other biosensors reported in the literature even in Na + containing electrolytes.

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Filmes de metal-hexacianoferrato: uma ferramenta em química analítica

Cited by 44 publications

References 37 publications

Electrochemical sensors: a powerful tool in analytical chemistry

Electrochemical sensors: a powerful tool in analytical chemistry

On the Template Synthesis of Nanostructured Inorganic/Organic Hybrid Films.

Polypyrrole/copper hexacyanoferrate hybrid as redox mediator for glucose biosensors

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