研究目的
Investigating the active control of the spectrum of the resonance wavelength of metallic nanoislands by means of an externally applied electric field in a system comprising a gold nanoisland film (Au NIF) covered with a liquid crystal (LC) material.
研究成果
The hybrid LC/Au NIF structure enabled the active control of the resonance wavelength of the spectrum in the metallic nanoisland. A combination of the nanostructured surface and birefringent LC opens the door for new electro-optical devices, tunable devices, nanoscale sensors, and additional applications.
研究不足
The tuning range of the active plasmonic device was limited due to the strong anchoring forces of the nanostructure. The resonant wavelength did not change when the applied voltage exceeded 8 V.
1：Experimental Design and Method Selection:
The study involved the fabrication of Au NIFs on a FTO coated glass substrate using a seed-mediated growth approach in the solution phase. The LC material was introduced into the cell, and the optical properties were studied under various applied voltages.
2：Sample Selection and Data Sources:
FTO substrates were used for the fabrication of Au NIFs. The LC material E7 was introduced into the cell.
3：List of Experimental Equipment and Materials:
SEM (S-4800, Hitachi Ltd.), arbitrary function generator (Tektronix AFG-3022B), fiberoptic spectrometer (Ocean Optics HR 2000).
4：0).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The FTO substrates were cleaned and coated with PAA. Au seeds were deposited, and the Au NIF was grown. The LC cell was assembled, and the optical properties were measured under various applied voltages.
5：Data Analysis Methods:
The average nanoisland size and gap distance were calculated from SEM images using ImageJ software. The absorption and scattering of spherical particles were calculated from Mie’s theory.
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