Topological and Electron-Transfer Properties of Glucose Oxidase Adsorbed on Highly Oriented Pyrolytic Graphite Electrodes

2008 ◽  
Vol 112 (13) ◽  
pp. 5165-5173 ◽  
Author(s):  
Mingkui Wang ◽  
Sven Bugarski ◽  
Ulrich Stimming
Keyword(s):  
Electron Transfer ◽  
Glucose Oxidase ◽  
Pyrolytic Graphite ◽  
Highly Oriented Pyrolytic Graphite ◽  
Graphite Electrodes ◽  
Electron Transfer Properties ◽  
Transfer Properties

scholarly journals Exploring the electrochemical performance of graphite and graphene paste electrodes composed of varying lateral flake sizes

2018 ◽  
Vol 20 (30) ◽  
pp. 20010-20022 ◽  
Author(s):  
Anthony J. Slate ◽  
Dale A. C. Brownson ◽  
Ahmed S. Abo Dena ◽  
Graham C. Smith ◽  
Kathryn A. Whitehead ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electrochemical Performance ◽  
Direct Relationship ◽  
Graphite Electrodes ◽  
Improved Performance ◽  
Electron Transfer Properties ◽  
Transfer Properties

A direct relationship is shown with respect to the lateral flake size comprising graphene and graphite electrodes and their corresponding electron transfer properties, with smaller flake sizes (increased edge plane contributions) resulting in improved performance.

Semisynthesis of bipyridyl-alanine cytochrome c mutants: novel proteins with enhanced electron-transfer properties

1993 ◽  
Vol 115 (18) ◽  
pp. 8455-8456 ◽  
Author(s):  
Deborah S. Wuttke ◽  
Harry B. Gray ◽  
Stewart L. Fisher ◽  
Barbara Imperiali
Keyword(s):  
Electron Transfer ◽  
Cytochrome C ◽  
Novel Proteins ◽  
Electron Transfer Properties ◽  
Transfer Properties

Adrenodoxin: Structure, stability, and electron transfer properties

2000 ◽  
Vol 40 (4) ◽  
pp. 590-612 ◽  
Author(s):  
Asya V. Grinberg ◽  
Frank Hannemann ◽  
Burkhard Schiffler ◽  
J�rgen M�ller ◽  
Udo Heinemann ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Structure Stability ◽  
Electron Transfer Properties ◽  
Transfer Properties

scholarly journals Cryptand-Functionalized Highly Oriented Pyrolytic Graphite Electrodes

2021 ◽  
Vol 13 (8) ◽  
pp. 4158
Author(s):  
Marcos A. Bento ◽  
Sara Realista ◽  
Ana S. Viana ◽  
Ana M. Ferraria ◽  
Paulo N. Martinho
Keyword(s):  
Photoelectron Spectroscopy ◽  
Diazonium Salt ◽  
Pyrolytic Graphite ◽  
Coupling Reaction ◽  
Modified Electrodes ◽  
Current Response ◽  
Highly Oriented Pyrolytic Graphite ◽  
Graphite Electrodes ◽  
Pyrolytic Graphite Electrode ◽  
20 Nm

Reproducible materials that have detection properties towards a certain molecule are very important for applications in the fabrication of devices. Among all the substrates that are used, highly oriented pyrolytic graphite allows to clearly image a monolayer. On the other hand, cryptand molecules are versatile because they can sense certain analytes with high selectivity. The highly oriented pyrolytic graphite electrode was first functionalized with an aryl bearing a bromine or an alkyne group to further attach cryptand molecules to its surface. The functionalization was performed through the electroreduction of aryl diazonium salts. While functionalization with an aryl-bromine produced a 20 nm-thick dendritic layer, functionalization of the surface with an aryl bearing a terminal alkyne produced a 9.7 nm-thick multilayer. However, if the diazonium salt is prepared in situ, a 0.9 nm monolayer with aryl–alkyne groups is formed. The alkyne functionalized electrode reacted with a bromo-cryptand through a Sonogashira C–C coupling reaction yielding electrodes functionalized with cryptands. These were immersed in a solution of a Co(II) salt resulting in Co(II)-cryptate modified electrodes, highlighting the ability of the cryptands’ modified electrode to sense metal ions. The electrode surface was analyzed by X-ray photoelectron spectroscopy after each modification step, which confirmed the successful functionalization of the substrate with both the cryptand and the cryptate. Cyclic voltammetry studies showed stable current response after approximately six cycles. Different reduction processes were detected for both cryptand (−1.40 V vs. SCE) and cryptate (−1.22 V vs. SCE) modified highly oriented pyrolytic graphite.

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