Potentiometric Response from Ion-Selective Nanospheres with Voltage-Sensitive Dyes

Xiaojiang Xie; Jingying Zhai; Eric Bakker

doi:10.1021/ja5107578

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Potentiometric Response from Ion-Selective Nanospheres with Voltage-Sensitive Dyes

Journal article

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Potentiometric Response from Ion-Selective Nanospheres with Voltage-Sensitive Dyes

Xiaojiang Xie, Jingying Zhai and Eric Bakker

Journal of the American Chemical Society, Vol.136(47), pp.16465-16468

2014

DOI: https://doi.org/10.1021/ja5107578

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Abstract

Chemical Sciences

potentiometric sensors

Potentiometric sensors require the implementation of conducting wires for signal transduction, but this is impractical for the readout of individual nanoparticles. It is here demonstrated for the first time that the potentiometric response of ion-selective nanospheres can be observed with voltage-sensitive dyes, thereby converting nanoscale electrochemical signals into an optical readout. No reference electrode is needed since the readout is by fluorescence. The results strongly support the potentiometric origin for the fluorescence response. The ionselective nanospheres exhibit excellent selectivity and respond to ion concentration changes independent of sample pH, providing a new platform of potentiometric nanosensors with optical readout compatible with optical imaging equipment.

Details

Title: Potentiometric Response from Ion-Selective Nanospheres with Voltage-Sensitive Dyes
Authors: Xiaojiang Xie (Author) - University of Geneva, Switzerland
Jingying Zhai (Author) - University of Geneva, Switzerland
Eric Bakker (Author) - University of Geneva, Switzerland
Publication details: Journal of the American Chemical Society, Vol.136(47), pp.16465-16468
Publisher: American Chemical Society
Date published: 2014
DOI: 10.1021/ja5107578
ISSN: 0002-7863
Copyright note: Copyright © 2014 The Authors. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99448633402621
Output Type: Journal article

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