Long Distance Electron Transfer Across >100 nm Thick Au Nanoparticle/Polyion Films to a Surface Redox Protein

Autor:	Bryan D. Huey, Yasemin Kutes, Hongmei Chai, Dong Zheng, Hongyun Liu, James F. Rusling, Naifei Hu, Xihong Guo
Jazyk:	angličtina
Rok vydání:	2012
Předmět:	Analytical chemistry Nanoparticle Nanotechnology Redox Article Analytical Chemistry Allylamine chemistry.chemical_compound Electron transfer Myoglobin chemistry Colloidal gold Electrode Electrochemistry Pyrolytic carbon
Popis:	Glutathione-decorated 5 nm gold nanoparticles (AuNPs) and oppositely charged poly(allylamine hydrochloride) (PAH) were assembled into {PAH/AuNP} n films fabricated layer-by-layer (LbL) on pyrolytic graphite (PG) electrodes. These AuNP/polyion films utilized the AuNPs as electron hopping relays to achieve direct electron transfer between underlying electrodes and redox proteins on the outer film surface across unprecedented distances >100 nm for the first time. As film thickness increased, voltammetric peak currents for surface myoglobin (Mb) on these films decreased but the electron transfer rate was relatively constant, consistent with a AuNP-mediated electron hopping mechanism.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81b1fa3457d64c731548604f307bf7cf https://europepmc.org/articles/PMC3666353/ Zobrazit plný text záznamu