研究目的
To determine absolute scattering cross-sections of individual TiN nanocubes (NCs) and compare them with those of Au nanospheres to understand the plasmonic properties of TiN nanostructures.
研究成果
The methodology developed enables the determination of absolute scattering cross-sections of TiN NCs, revealing that their scattering cross-section is ~2 times smaller than that of Au NSs. The proper choice of dielectric functions is crucial for analyzing LSPR of TiN nanostructures.
研究不足
The dielectric function of TiN depends strongly on the preparation procedure, making it difficult to simulate optical responses precisely. The study is limited to TiN NCs smaller than 100 nm.
1：Experimental Design and Method Selection:
Combining TEM and single-particle spectroscopy to analyze the morphology and scattering spectra of TiN NCs.
2：Sample Selection and Data Sources:
TiN NCs synthesized by the thermal plasma process and Au nanospheres as references.
3：List of Experimental Equipment and Materials:
TEM (H-7000, HITACHI and JEM-2100F, JEOL), XPS (Phi X-tool, ULVAC-PHI), dark-field optical microscope, monochromator (SpectraPro-300i, Princeton Instruments), CCD (Princeton Instruments).
4：Experimental Procedures and Operational Workflow:
Placing TiN NCs on an ultrathin SiO2 membrane, TEM observation, scattering spectrum measurement, and comparison with Au nanospheres.
5：Data Analysis Methods:
Using the rigorous boundary element method (BEM) for calculating scattering spectra and comparing with experimental data.
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