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Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment
Published on: April 4, 2017
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Plasmonic nanoparticle etching-based optical sensors: current status and future prospects
1Centre for Nanobiotechnology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India. jsatija11@gmail.com.
The Analyst
|November 2, 2023
Summary
Plasmonic nanoparticle etching offers a sensitive, label-free method for multicolorimetric sensing. This technique enhances analyte detection accuracy and visual inspection for biosensing and chemosensing applications.
Area of Science:
- Nanotechnology
- Analytical Chemistry
- Materials Science
Background:
- Plasmonic nanoparticles (gold and silver) are utilized in label-free multicolorimetric sensors.
- Nanoparticle color is determined by size, shape, orientation, and interparticle distance.
- Etching, a nanoparticle oxidation process, modifies physical properties for sensing applications.
Purpose of the Study:
- To review target sensing strategies using nanoparticle etching.
- To discuss mechanisms of various etching-based sensing approaches.
- To highlight the potential of etching for advanced sensing systems.
Main Methods:
- Review of direct etching, enzyme-mediated etching, and chemical reaction-driven etching strategies.
- Analysis of anti-etching-based sensor mechanisms.
- Discussion of how etching alters nanoparticle properties for detection.
Main Results:
- Nanoparticle etching enables simple, sensitive, and selective analyte detection.
- Multicolor readout from etching sensors improves accuracy over conventional assays.
- Etching strategies offer a versatile platform for developing novel sensors.
Conclusions:
- Nanoparticle etching is a promising technique for label-free multicolorimetric sensing.
- Future applications include portable devices for on-time, in situ, and point-of-care sensing.
- Etching strategies can significantly advance biosensing and chemosensing capabilities.
