研究目的
Investigating the fabrication of self-assembled core-shell structured organic nanofibers via single-nozzle electrospinning for highly sensitive ammonia sensors.
研究成果
The study successfully demonstrated the fabrication of core-shell structured PQT-12/PEO nanofibers via single-nozzle electrospinning, which exhibited high sensitivity to low-concentration ammonia. The thickness of the sensing shell could be tuned by adjusting the mass ratio of PQT-12 and PEO, offering a designable process for integrating multifunctional organic semiconducting layers into electronic systems.
研究不足
The study focuses on the sensitivity to ammonia and does not extensively explore the sensor's performance under varying environmental conditions or its long-term stability. The fabrication process's scalability and the uniformity of nanofiber deposition are also areas that could be further optimized.
1：Experimental Design and Method Selection:
The study employed a single-nozzle electrospinning system to fabricate PQT-12/PEO nanofibers with core-shell structures, utilizing spontaneous phase separation during the electrospinning process.
2：Sample Selection and Data Sources:
PQT-12 and PEO were mixed in chlorobenzene to prepare blend solutions with different weight ratios for electrospinning.
3：List of Experimental Equipment and Materials:
A single nozzle electrospinning system (inner diameter of nozzle ≈
4：33 mm), scanning electron microscope (Nova NanoSEM 450, FEI), transmission electron microscope (JEM-2100F, JEOL), XPS (ESCALAB 250Xi, Thermo Fisher), and semiconductor parametric analyzer (Keithley 4200-SCS, Tektronix) were used. Experimental Procedures and Operational Workflow:
The electrospinning process was performed at a voltage of 15 kV, with a nozzle-to-collector distance of 10 cm and a feeding rate of 10 μL min?
5：The nanofibers were characterized for morphology and elemental distribution, and their sensing performance to ammonia was tested. Data Analysis Methods:
The sensing performance was analyzed based on the change in device current upon exposure to ammonia, with sensitivity calculated as the percentage of current decrease divided by the ammonia concentration.
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