Observation of nanoimpact events of catalase on diamond ultramicroelectrodes by direct electron transfer | Zendy

Luyun Jiang | Zendy; Ibon Santiago | Zendy; John S. Foord | Zendy

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Observation of nanoimpact events of catalase on diamond ultramicroelectrodes by direct electron transfer

Author(s) -

Luyun Jiang,

Ibon Santiago,

John S. Foord

Publication year - 2017

Publication title -

chemical communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.837

H-Index - 333

eISSN - 1364-548X

pISSN - 1359-7345

DOI - 10.1039/c7cc04085g

Subject(s) - electron transfer , diamond , chemistry , catalase , electron , materials science , nanotechnology , chemical physics , photochemistry , physics , biochemistry , organic chemistry , enzyme , quantum mechanics

We report electrochemical detection of single-catalase collisions at diamond ultramicroelectrodes and show the operative mechanism involves direct enzyme-mediated charge transfer between electrode and solution. Hydrogen peroxide increases the collision frequency, which fluorescence correlation spectroscopy diffusion measurements suggest stems from an increase in the diffusion rate as the underlying cause.

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