Journal article
Colorimetric sensing of dopamine using hexagonal silver nanoparticles decorated by task-specific pyridinum based ionic liquid
K.N. Toosi University of Technology1
Iranian National Institute for Oceanography and Atmospheric Science2
Amirkabir University of Technology3
Center for Nanostructured Graphene, Centers, Technical University of Denmark4
Department of Micro- and Nanotechnology, Technical University of Denmark5
Nanocarbon, Department of Micro- and Nanotechnology, Technical University of Denmark6
A simple and sensitive platform was introduced for detection of dopamine (DA) based on morphology transition and etching strategy of hexagonal platelet shaped silver nanoparticles (Ag NPs) functionalized with task-specific ionic liquid (TSIL). In this study, a pyridinium based TSIL was used for surface functionalization.
According to the etching strategy, hexagonal TSIL-Ag NPs were converted to round-shape nanoparticles in the presence of DA. This etching process caused a blue shift in the localized surface plasmon resonance (LSPR) peak of TSIL-Ag NPs. The maximum absorption band shifted from 585 nm to 500 nm. Color change from green to red was also observed as a consequence of morphology transition of TSIL-Ag NPs.
The color change and change in the A500/A585 ratio versus DA concentration were linear in the range of 0.1–7.5 μM with a detection limit of 0.031 μM. Moreover, the developed approach was applied for detection and determination of DA in human serum sample. This simple, rapid and selective method provided a promising sensing probe for detection of DA in biological fluids.
Language: | English |
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Year: | 2018 |
Pages: | 64-72 |
ISSN: | 18733077 and 09254005 |
Types: | Journal article |
DOI: | 10.1016/j.snb.2018.05.116 |
ORCIDs: | Booth, Timothy J. and 0000-0001-6080-0681 |