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Self-assembly plasmonic metamaterials based on templated annealing for advanced biosensing
Optics Express
|March 3, 2020
Summary
We developed a new method to create self-assembling plasmonic metamaterials using fluid instabilities. This technique generates dual resonant peaks for highly sensitive biosensing applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optics
Background:
- Plasmonic metamaterials offer unique optical properties.
- Fabrication of complex nanostructures remains a challenge.
- Anodic aluminum oxide (AAO) templates are versatile platforms.
Purpose of the Study:
- To introduce a novel method for fabricating self-assembly plasmonic metamaterials.
- To achieve dual resonant peaks for enhanced sensing capabilities.
- To demonstrate high refractive index resolution and biomolecule detection.
Main Methods:
- Exploiting fluid instabilities in optical thin films for self-assembly.
- Utilizing the interplay between template reflow and spinodal dewetting.
- Generating dual-sized metal nanoparticles on AAO templates.
Main Results:
- Achieved double resonant peaks in the extinction spectrum.
- Demonstrated high refractive index resolutions of 3.27 × 10-4 and 2.53 × 10-4 RIU.
- Showcased excellent biomolecule surface sensing performance with low limits of detection (68 and 79 nM for Concanavalin A).
Conclusions:
- The novel fabrication method enables the creation of advanced plasmonic metamaterials.
- The dual-mode plasmonic nanoplatform exhibits superior sensing capabilities due to electric field confinement.
- This approach holds significant potential for sensitive detection of biomolecules.
