Journal Article

FZJ-2017-06414

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The Influence of Supporting Ions on the Electrochemical Detection of Individual Silver Nanoparticles: Understanding the Shape and Frequency of Current Transients in Nano-impacts

Krause, K. J. ; Brings, F.FZJ* ; Schnitker, J.FZJ* ; Kätelhön, E. ; Rinklin, P. ; Mayer, D.FZJ* ; Compton, R. G. ; Lemay, S. G. ; Offenhäusser, A.FZJ* ; Wolfrum, B. (Corresponding author)FZJ*

2017
Wiley-VCH Weinheim

This record in other databases:      

Please use a persistent id in citations: http://hdl.handle.net/2128/15928  doi:10.1002/chem.201605924

Abstract: We report the influence of electrolyte composition and concentration on the stochastic amperometric detection of individual silver nanoparticles at microelectrode arrays and show that the sensor response at certain electrode potentials is dependent on both the conductivity of the electrolyte and the concentration of chloride ions. We further demonstrate that the chloride concentration in solution heavily influences the characteristic current spike shape of recorded nanoparticle impacts: While typically too short to be resolved in the measured current, the spike widths are significantly broadened at low chloride concentrations below 10 mm and range into the millisecond regime. The analysis of more than 25 000 spikes reveals that this effect can be explained by the diffusive mass transport of chloride ions to the nanoparticle, which limits the oxidation rate of individual silver nanoparticles to silver chloride at the chosen electrode potential.

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Contributing Institute(s):

1. Bioelektronik (ICS-8)
2. Bioelektronik (PGI-8)

Research Program(s):

1. 523 - Controlling Configuration-Based Phenomena (POF3-523) (POF3-523)

Appears in the scientific report 2017

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Database coverage:
; ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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