研究目的
To investigate the intermolecular H-bonding interaction in 2-mercaptobenzoic acid (2-MBA) molecules adsorbed on the surface of ZnO nanoparticles using low-frequency SERS in THz region and mid-IR SERS.
研究成果
The study successfully probes the self-association of 2-MBA molecules due to intermolecular H-bonding using low-frequency SERS in the THz region and mid-IR SERS. The technique shows potential for detecting polymorphs, conformations, and oligomers due to H-bond interactions at low concentrations.
研究不足
The study is limited to the investigation of H-bonding interaction in 2-MBA molecules adsorbed on ZnO nanoparticles. The technique's applicability to other molecules or substrates is not explored.
1：Experimental Design and Method Selection:
The study uses low-frequency SERS in the THz region (>50 cm-1) and mid-IR SERS to probe H-bonding interaction in 2-MBA molecules adsorbed on ZnO nanoparticles.
2：Sample Selection and Data Sources:
Different molar concentrations of 2-MBA are prepared in ethanol and mixed with ZnO NPs. SERS samples are dried before measurement.
3：List of Experimental Equipment and Materials:
Renishaw inVia Raman spectrometer equipped with 532 nm laser, Leica DM 2500M microscope, ZnO nanoparticles, 2-MBA.
4：Experimental Procedures and Operational Workflow:
SERS spectra are recorded at room temperature with a laser power density ~ 150 μW/μm
5：The incident laser beam is focused on the sample by a 50x working distance objective. Data Analysis Methods:
DFT calculations are carried out using Gaussian 03 and Gauss View 4.1 program packages to support experimental results.
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