研究目的
Exploring the application of synchrotron radiation to studying on-surface catalysis, specifically the formation of two-dimensional covalent networks.
研究成果
Synchrotron radiation is a versatile and high-quality tool to investigate chemistry occurring at the surface interface, providing significant fundamental understanding into on-surface polymerization reactions through techniques like SXPS, NEXAFS, and NIXSW.
研究不足
Identification of stoichiometry is challenging in XPS due to unknown inelastic mean free paths and photoelectron diffraction effects. Quantitative inspection of NEXAFS is plagued by difficulties in background subtraction and step normalization.
1：Experimental Design and Method Selection:
Utilizes synchrotron radiation techniques including synchrotron X-ray photoemission spectroscopy (SXPS), near-edge X-ray absorption fine structure (NEXAFS), and normal incidence X-ray standing waves (NIXSW) to study on-surface polymerization.
2：Sample Selection and Data Sources:
Focuses on the polymerization of dibromo-biphenyl into poly-p-phenylene on Ag(111) and Cu(110) surfaces.
3：List of Experimental Equipment and Materials:
Synchrotron light sources, bending magnets, insertion devices (wigglers or undulators).
4：Experimental Procedures and Operational Workflow:
Measurement of photoelectron flux as a function of electron’s kinetic energy, monitoring of chemical reaction progress and intermediate steps in Ullman coupling.
5：Data Analysis Methods:
Analysis of photoelectron spectra, comparison with theoretical calculations, and determination of molecular orientation through angle-resolved NEXAFS.
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