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以固态离子学方法制备的宏观长银(Ag)纳米线簇为基础,采用气-固反应法制备出宏观长硫化银(Ag2S)纳米线簇.利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、能量色散谱(EDS)和X射线光电子能谱(XPS)等手段对样品形貌和成分进行表征.将厘米长的Ag2S纳米线簇两端涂敷金胶作为电极,并与外电路连接.在不同温度或采用不同波长的光束辐照下,测试了样品的输运性质.无光照时,在144—380K的温度范围内,样品的电导随温度上升而非线性增大.室温下,Ag2S纳米线簇在532nm或1064nm波长的激光辐照下均具有敏感的正光电导效应.研究结果展示了Ag2S纳米线是制备纳米温度传感器和纳米光电传感器的理想材料.
Based on the macro silver (Ag) nanowire clusters prepared by solid state ion method, macroscopic long Ag2S nanowire clusters were prepared by the gas-solid reaction method and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) were used to characterize the morphology and composition of the samples.The Ag2S nanowire clusters of centimeter-long clusters were coated with gold glue as electrodes and connected with external circuits The transport properties of the samples were tested under different temperatures or different wavelengths of beam irradiation.Without the illumination, the conductance of the samples increases non-linearly with the increase of temperature in the temperature range of 144-380 K. Under room temperature, Ag2S nanowire cluster has sensitive positive photoconductive effect under 532nm or 1064nm laser irradiation.The results show that Ag2S nanowire is an ideal material for preparing nanometer temperature sensor and nanometer photoelectric sensor.