研究目的
Investigating the electrical and optical responses of composite films based on N,N-dimethylamino-4′-N′-methylstilbazolium 2,4,6-trimethylbenzenesulfonate (DSTMS)-graphene.
研究成果
The study successfully prepared and characterized DSTMS-graphene composite films, demonstrating enhanced electrical and optical properties compared to pure DSTMS films. The in-situ composite film showed superior performance in terms of conductivity and pressure sensitivity, suggesting potential applications in IR detectors and weight sensors. This work provides a new method to modify the properties of organic nonlinear crystals like DSTMS by doping with graphene.
研究不足
The study is limited to composite films with a 2% concentration of graphene. The practical applications of DSTMS in opto-electronic or electronic devices are still challenging due to its poor conductivity and the difficulty in preparing device-quality DSTMS-based thin films.
1：Experimental Design and Method Selection:
The study involved the preparation of DSTMS-graphene composite films through ex-situ and in-situ methods, followed by systematic characterization.
2：Sample Selection and Data Sources:
DSTMS was synthesized from 4-methylpyridine, methyl p-toluenesulfonate, and 4-dimethylaminobenzaldehyde. Graphene was commercial grade.
3：List of Experimental Equipment and Materials:
Instruments included XRD, FT-IR, UV–Vis-NIR spectrophotometer, TG/DSC, SEM, and a Keithley 6487 high-resistance meter system.
4：Experimental Procedures and Operational Workflow:
The synthesis involved ultrasonic treatment, evaporation, and drying processes. Characterization included XRD, FT-IR, UV–Vis-NIR, TG/DSC, SEM, and electrical measurements.
5：Data Analysis Methods:
Optical band gaps and extinction coefficients were calculated from UV–Vis-NIR data. Electrical properties were analyzed through I–V and pressure-removed tests.
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