研究目的
Investigating the correlation between the morphologies of silver aggregates synthesized via laser-induced reduction and their surface-enhanced Raman scattering (SERS) performance to develop optimal SERS materials.
研究成果
The study successfully synthesized highly active silver aggregates with optimal SERS performance by controlling laser power and irradiation time. The optimal aggregates were composed of closely packed nanorice and flake structures with abundant surface roughness, providing a high density of hot spots for SERS detection. This understanding aids in the development of practical SERS techniques.
研究不足
The study focuses on the synthesis and characterization of silver aggregates under specific conditions (laser power and irradiation time). The generalizability to other metallic nanostructures or different synthesis conditions is not explored.
1：Experimental Design and Method Selection:
A 532 nm continuous wave laser was used to induce the synthesis of silver aggregates on an ITO–solution interface. The morphologies of the aggregates were controlled by varying laser power and irradiation time.
2：Sample Selection and Data Sources:
Silver nitrate and sodium citrate dihydrate were used to prepare the reactant mixture. The morphologies of the synthesized silver aggregates were characterized using SEM.
3：List of Experimental Equipment and Materials:
Scanning electron microscope (SEM, S-4800, 10 kV, Hitachi, Japan), inVia Renishaw Raman Spectrometer, 532 nm laser.
4：Experimental Procedures and Operational Workflow:
The reactant mixture was placed in a cell made of ITO glass and a cover glass. The laser was focused on the ITO glass through an objective. The synthesized aggregates were rinsed and characterized.
5：Data Analysis Methods:
The SERS performance was evaluated using crystal violet as a probe, and the enhancement factor was calculated based on Raman intensity.
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