研究目的
Investigating the role of graphene oxide in the photodeposition and SERS activity of plasmonic Ag nanoparticles substrates.
研究成果
Graphene oxide plays a significant role in the SERS activity of Ag nanoparticles substrates by quenching the fluorescence of rhodamine B, thereby enhancing the Raman signal. The photocatalytic method presented is efficient for synthesizing and immobilizing AgNP in a controlled manner, offering a promising approach for SERS applications.
研究不足
The study focuses on the role of graphene oxide in enhancing SERS activity through fluorescence quenching and does not extensively explore other potential mechanisms or materials.
1：Experimental Design and Method Selection:
The study employs a photocatalytic method based on layer-by-layer films of TiO2 nanoparticles combined with either poly(sodium 4-styrenesulfonate) (PSS) or graphene oxide (GO) to synthesize and immobilize Ag nanoparticles (AgNP) for SERS applications.
2：Sample Selection and Data Sources:
Quartz slides were used as solid substrates. Aqueous suspensions of cationic TiO2 nanoparticles and anionic GO were prepared.
3：List of Experimental Equipment and Materials:
UV-Vis spectrophotometer, SEM-EDS, Horiba micro-Raman spectrometer, and other analytical tools were used.
4：Experimental Procedures and Operational Workflow:
The photocatalyst film was deposited by successive immersion into cationic TiO2NP and anionic (PSS or GO) suspensions, followed by rinsing and drying. AgNP photodeposition was monitored by UV-Vis spectroscopy.
5：Data Analysis Methods:
The kinetics of AgNP photodeposition was analyzed using a first-order kinetic process. SEM was used to analyze the morphology of AgNP.
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