1. Engineering the surface roughness of the gold nanoparticles for the modulation of LSPR and SERS.
- Author
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Feng, Ziqi, Jia, Yun, and Cui, Hongyou
- Subjects
- *
SURFACE roughness , *RAMAN scattering , *SURFACE plasmon resonance , *GOLD nanoparticles , *LIGANDS (Chemistry) , *SURFACE plates - Abstract
Using strong ligand as morphology directing agent, AuNPs with sheet-like surface sub-structures were successfully synthesized. Arising from the continuous tuning of the strong ligand control, the surface roughness of the AuNPs can be continuously tuned, so thus the LSPR and SERS. [Display omitted] In this work, we reported that by using a strong thiol ligand as the morphology-directing reagent, a series of Au nanoparticles with plate-like surface sub-structures could be successfully obtained via a one-pot seedless synthesis. The size and the density of the plates on the surface of Au can be readily tuned with the amount of the thiol ligand, resembling different roughness of the surface. Arising from the different surface roughness, the localized surface plasmon resonance (LSPR) of these shape and morphological alike Au nanoparticles can be continuously tuned within the visible-NIR region. The broad LSPR absorptions and feasible tunability make the Au nanoparticles suitable candidate for plasmonic-related applications. Interestingly, huge SERS enhancement was simultaneously achieved based on the specific surface roughness. Our results demonstrate the great potentials for tuning the LSPR and SERS of Au nanostructures through the engineering of the surface morphologies, which would assist for the design, synthesis, and applications of Au-based plasmonic nanomaterials in various fields. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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