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Multicolor biosensor for fish freshness assessment with the naked eye
- Source :
- Sensors and Actuators B: Chemical. 252:201-208
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Fish product is one of the main seafood with the disadvantage of easy to perish. Various indexes and diverse methods have been developed to evaluate the fish freshness, but most of them are complex and cannot be applied for on-field detection. In this study, we reported a simple, visual and economical multicolor biosensor based on the etching of gold nanorods (GNRs) to evaluate the fish freshness with the naked eye. Hypoxanthine (Hx) is chosen as the index of fish freshness and it react with the dissolved oxygen to produce H 2 O 2 at the presence of xanthine oxidase (XOD). Then GNRs are etched quickly by the H 2 O 2 in the presence of Fe 2+ . Correspondingly, the GNRs surface plasmon resonance (SPR) is regulated and results in a distinctly color change of the system, which can be easily distinguished with the naked eye. Therefore, the concentration of Hx in the fish samples can be semi-quantitatively analyzed with the naked eye. The proposed multicolor Hx sensor has been successfully applied to the detection of Hx in fish samples.
- Subjects :
- Chromatography
Chemistry
010401 analytical chemistry
Metals and Alloys
Analytical chemistry
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Materials Chemistry
Fish
Naked eye
Electrical and Electronic Engineering
Surface plasmon resonance
0210 nano-technology
Instrumentation
Biosensor
Subjects
Details
- ISSN :
- 09254005
- Volume :
- 252
- Database :
- OpenAIRE
- Journal :
- Sensors and Actuators B: Chemical
- Accession number :
- edsair.doi...........98998f5d6222b2582182c15737a4b8ea
- Full Text :
- https://doi.org/10.1016/j.snb.2017.06.007