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目的:研究以KOH修饰的碳量子点(K-CQD)作为湿敏材料的湿度传感器性能。方法:通过透射电子显微镜(TEM)和荧光光谱仪表征碳量子点(CQD)的结构和性能，利用紫外可见光谱(UV-vis)和红外光谱(FT-IR)对比分析CQD和K-CQD的结构差异；以CQD和K-CQD作为湿敏材料，采用滴涂法制备湿度传感器，测试其湿敏特性。结果:以K-CQD为湿敏材料制备的湿度传感器在11%～57%相对湿度(RH)范围内灵敏度达到165.34 pF/%RH,在57%～97%RH范围内灵敏度达到2 132.06 pF/%RH。与未修饰的CQD相比，K-CQD显著提升了湿度传感器的灵敏度和稳定性。结论:KOH修饰能够显著提升碳量子点湿度传感器的灵敏度和稳定性，使其能够应用于各种非接触式检测场景。
Abstract：Aims: This study investigates the efficacy of humidity sensors utilizing KOH-modified carbon quantum dots(K-CQD) as humidity-sensitive materials. Methods: Carbon quantum dots(CQD) were characterized using the transmission electron microscopy(TEM) and the fluorescence spectroscopy. The structures of compounds CQD and K-CQD were compared utilizing the UV-visible spectroscopy(UV-vis) and the Fourier-transform infrared spectroscopy(IR). Both compounds were employed as humidity-sensitive materials in the fabrication of humidity sensors via the drop-coating method, followed by an evaluation of their humidity-sensitive properties. Results: The humidity sensor, fabricated by using K-CQD, demonstrated a sensitivity of 165.34 pF/%RH within the 11%～57% relative humidity(RH) range and 2 132.06 pF/%RH within the 57%～97% RH range. In addition, this material significantly enhanced the sensitivity and stability of the humidity sensor. Conclusions: The modification of KOH significantly improves both the sensitivity and the stability of the carbon quantum dot humidity sensor, making it suitable for various non-contact detection applications.
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基本信息:
DOI：
中图分类号:TP212;TB383.1;TQ127.11
引用信息:
[1]赵增朋,金飞,葛洪良等.基于KOH修饰碳量子点的电容式湿度传感器研究[J].中国计量大学学报,2025,36(01):9-16.
基金信息: