研究目的
To outline different concepts to reconfigure the chiroptical responses of plasmonic nano- and micro-objects, enabling manipulation of their optical chirality postfabrication for applications in polarization conversion, enantioselective analysis, chiral sensing, and catalysis.
研究成果
The field of reconfigurable plasmonic chirality has advanced significantly, offering tailored and pronounced optical characteristics for various applications. The ability to manipulate the chiroptical responses of plasmonic structures postfabrication opens new avenues for ultrasensitive nanoscale sensors and polarization control in integrated optical circuitry. The choice of reconfiguration strategy depends on the intended application, whether it involves far-field manipulation or near-field interactions.
研究不足
The reconfiguration of plasmonic chirality is limited by the need for specific stimuli (e.g., heat, light, pressure) and the complexity of fabricating and manipulating nanostructures. Additionally, the degree of reconfiguration and the stability of the reconfigured states may vary depending on the materials and methods used.
1：Experimental Design and Method Selection:
The study discusses various strategies for reconfiguring the chiroptical responses of plasmonic structures, including spectral reconfiguration using phase-change materials, photoinduced reconfiguration, structural reconfiguration via strain and pressure, and solution-based reconfiguration using DNA nanotechnology.
2：Sample Selection and Data Sources:
The research utilizes plasmonic nanostructures fabricated via top-down and bottom-up techniques, including DNA origami for solution-based structures.
3：List of Experimental Equipment and Materials:
Includes gold nanorods, germanium–antimony–tellurium (GST) as a phase-change material, silicon (Si) pads, and DNA origami templates.
4：Experimental Procedures and Operational Workflow:
Detailed procedures involve the fabrication of plasmonic structures, application of stimuli (heat, light, pressure, pH changes), and measurement of chiroptical responses via circular dichroism (CD) spectroscopy.
5：Data Analysis Methods:
Interpretation of CD and optical rotatory dispersion (ORD) spectra using theoretical models like the Born–Kuhn model to understand the chiroptical features of plasmonic structures.
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