Journal Article

FZJ-2014-01006

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Oleylamine-Stabilized Gold Nanostructures for Bioelectronic Assembly. Direct Electrochemistry of Cytochrome c

Koposova, E. (Corresponding author)FZJ* ; Kisner, A. ; Shumilova, G. ; Ermolenko, Y. ; Offenhäusser, A.FZJ* ; Mourzina, Y.FZJ*

2013
Soc. Washington, DC

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Please use a persistent id in citations: http://hdl.handle.net/2128/15945  doi:10.1021/jp401764p

Abstract: Methods to prepare ultrathin gold nanowires and monodisperse nanoparticles based on the intrinsic property of gold(I) ions to form aurophilic interactions stabilized by oleylamine and long-chain alkylamine have been widely explored. Due to the low thermodynamic stability of the high aspect ratio nanostructures, their conjugation and assembly into functional nanosystems have not been explored so far. One of the reasons for this is that the surface of the nanostructures is insulated by stabilization compounds, which preserve the integrity of the nanostructures but at the same time form an insulating barrier in electronic and electrochemical systems in contact areas and for the charge transfer reactions. Conjugation of a metalloprotein cytochrome c (Cyt c) with oleylamine-stabilized gold ultrathin nanowires and nanoparticles into a bioelectrochemically active nanoarchitecture is presented here for the first time. Methods of preparing and assembling the ultrathin nanowires and nanoparticles on the thin-film gold electrodes are shown. Thermodynamic and kinetic parameters were obtained for the direct electron transfer reaction of cyt c on these surfaces. Nanowires are responsible for an approximately −20 mV shift in the redox potential of the ferri/ferro-cyt c couple relative to a thin-film gold electrode.

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Contributing Institute(s):

1. Bioelektronik (PGI-8)
2. Bioelektronik (ICS-8)
3. JARA-FIT (JARA-FIT)
4. Mikrostrukturforschung (PGI-5)

Research Program(s):

1. 423 - Sensorics and bioinspired systems (POF2-423) (POF2-423)
2. 453 - Physics of the Cell (POF2-453) (POF2-453)

Appears in the scientific report 2013

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Database coverage:
; ; Current Contents - Social and Behavioral Sciences ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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