Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/89482
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Type: Journal article
Title: Nanoliter-scale, regenerable ion sensor: sensing with a surface functionalized microstructured optical fibre
Author: Heng, S.
Nguyen, M.
Kostecki, R.
Monro, T.
Abell, A.
Citation: RSC Advances: an international journal to further the chemical sciences, 2013; 3(22):8308-8317
Publisher: Royal Society of Chemistry
Issue Date: 2013
ISSN: 2046-2069
2046-2069
Statement of
Responsibility: 
Sabrina Heng, Mai-Chi Nguyen, Roman Kostecki, Tanya M. Monro and Andrew D. Abell
Abstract: The first nanoliter-scale regenerable ion sensor based on a microstructured optical fibre (MOF) is reported. The air holes of the MOF are functionalized with a monoazacrown bearing spiropyran to give a switchable sensor that detects lithium ions down to 100 nM in nanoliter-scale volumes. Ion binding is turned on and off on upon irradiation with light, with the sensor being unaffected by multiple rounds of photoswitching. Unbound ions are flushed from the fibre in the ‘off’ state to allow the sensor to be reused. The integration of an ionophore into the sensor paves the way for the development of highly specific light-based sensing platforms that are readily adaptable to sense a particular ion simply by altering the ionophore design.
Rights: © The Royal Society of Chemistry
DOI: 10.1039/c3ra40321a
Grant ID: ARC
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