研究目的
To study the effect of reduced graphene oxide (rGO) in metal-semiconductor core-shell structures based on SERS and to understand the role of rGO platform in enhancing SERS activity of single Ag@Cu2O core-shell particles.
研究成果
The rGO platform significantly enhances the SERS activity of single Ag@Cu2O core-shell structures due to its different dielectric constants and plasmon-exciton coupling effects. This research expands the basic theoretical research of nanomaterials and provides a theoretical basis for optoelectronics research.
研究不足
The study focuses on the SERS enhancement mechanism in the presence and absence of rGO for Ag@Cu2O core-shell structures. The limitations include the specificity of the nanocomposite structures studied and the laser excitations used.
1：Experimental Design and Method Selection:
The study employed wet chemical methods to synthesize Ag@Cu2O nanoparticles and Ag@Cu2O-rGO composites. The SERS performance was evaluated using 4-MBA as a probe molecule under 514 and 633 nm laser excitations.
2：Sample Selection and Data Sources:
Samples included Cu2O, Ag@Cu2O, and Ag@Cu2O-rGO nanostructures.
3：List of Experimental Equipment and Materials:
Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–Vis absorption spectra, and a confocal microscopy Raman spectrometer were used.
4：Experimental Procedures and Operational Workflow:
Synthesis of Ag@Cu2O nanoparticles and Ag@Cu2O-rGO composites, characterization of their morphologies and structures, and SERS measurements.
5：Data Analysis Methods:
The enhancement factors (EF) were calculated based on the SERS intensity compared with bulk Raman intensity of 4-MBA.
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