宏观长Ag2S纳米线簇的制备及其温度电导特性和光电导特性

董占民; 孙红三; 许佳; 李一; 孙家林

清华大学物理系,北京,100084

清华大学建筑学院,北京,100084

Fabrication, temperature-conductance and photoconductance characteristics of the macroscopic-long Ag~ S nanowire bundle

摘要: 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．

关键词:

Abstract: According to the macroscopic-long Ag nanowire bundle which is prepared by the solid-state ionics method, we fabricate a macroscopic-long AgeS nanowire bundle using a gas-solid reaction. Their morphologies and components are characterized by the SEM, TEM, EDS and XPS. Au paints as electrodes are coated on both ends of a cm-long Ag2S nanowire bundle and then connected to an external circuit. The transport properties of the Ag2S nanowire bundle are studied at different temperatures or under the light irradiation of different wavelengths. Without light irradiation, as temperature T increases from 144 K to 380 K, the dark conductance increases nonlinearly with T. At room temperature, the significant positive photoconductivity induced by the 532 nm or 1064 nm laser is observed. These results demonstrate that Ag2S nanowire is a kind of ideal material for making the nanoscale temperature and photoelectric sensors.

宏观长Ag2S纳米线簇的制备及其温度电导特性和光电导特性

清华大学物理系,北京,100084

清华大学建筑学院,北京,100084

关键词:

Fabrication, temperature-conductance and photoconductance characteristics of the macroscopic-long Ag~ S nanowire bundle

清华大学物理系,北京,100084

清华大学建筑学院,北京,100084

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