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Open AccessArticle

Controlling the Morphologies of Silver Aggregates by Laser-Induced Synthesis for Optimal SERS Detection

Beijing Key Laboratory of Nano-Photonics and Nano-Structure (NPNS), Department of Physics, Capital Normal University, Beijing 100048, China
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Nanomaterials 2019, 9(11), 1529; https://doi.org/10.3390/nano9111529
Received: 29 September 2019 / Revised: 22 October 2019 / Accepted: 22 October 2019 / Published: 27 October 2019
(This article belongs to the Special Issue Application of Novel Plasmonic Nanomaterials on SERS)
Controlling the synthesis of metallic nanostructures for high quality surface-enhanced Raman scattering (SERS) materials has long been a central task of nanoscience and nanotechnology. In this work, silver aggregates with different surface morphologies were controllably synthesized on a glass–solution interface via a facile laser-induced reduction method. By correlating the surface morphologies with their SERS abilities, optimal parameters (laser power and irradiation time) for SERS aggregates synthesis were obtained. Importantly, the characteristics for largest near-field enhancement were identified, which are closely packed nanorice and flake structures with abundant surface roughness. These can generate numerous hot spots with huge enhancement in nanogaps and rough surface. These results provide an understanding of the correlation between morphologies and SERS performance, and could be helpful for developing optimal and applicable SERS materials. View Full-Text
Keywords: silver aggregates; laser-induced synthesis; surface-enhanced Raman scattering; hot spots silver aggregates; laser-induced synthesis; surface-enhanced Raman scattering; hot spots
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MDPI and ACS Style

Yang, L.; Yang, J.; Li, Y.; Li, P.; Chen, X.; Li, Z. Controlling the Morphologies of Silver Aggregates by Laser-Induced Synthesis for Optimal SERS Detection. Nanomaterials 2019, 9, 1529.

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