Ag/PVP纳米复合材料尺寸相关的直接光传输相对湿度传感

2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1) Pub Date : 2012-03-07 DOI:10.1109/ISPTS.2012.6260935

Poonam D. Mahapure, V. Mathe, R. Aiyer, S. Gosavi, P. Adhyapak, D. Amalnerkar

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引用次数: 0

摘要

采用化学方法在0.01M PVP中原位合成了不同粒径的银颗粒(A1 A2 A3 A4和A5)。采用直接光传输法研究了尺寸相关湿度传感。利用紫外可见光谱、DLS光谱和阻抗光谱对合成材料进行了结构表征和元素分析。阻抗谱随反应时间的变化解释了聚合物纳米复合材料的结构变化。反应时间30 min后取出的样品在较宽的湿度传感范围(2 - 94% RH)即5.37(78-94)，2.31(77-59)和0.32 (2-58)mv/% RH时显示出更高的灵敏度。a1样品具有较低的滞后，响应时间约为24秒，恢复时间约为33秒。它们在7个周期内显示出良好的重复性和2个样品的再现性。

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Size dependent relative humidity sensing of Ag/PVP nanocomposites by direct optical transmission method

Ag particles having different sizes (A1 A2 A3 A4 and A5) were in situ synthesized by using chemical route in 0.01M PVP. Size dependent humidity sensing was studied by direct optical transmission method. Structural characterization and elemental analysis of the synthesized materials is carried out using UV-Visible, DLS and Impedance spectra. Change in impedance spectra with reaction time gave explanation about structural changes in polymer nanocomposite. Samples taken out after reaction time of 30 min show more sensitivity during wide humidity sensing range (2–94 % RH) i.e. 5.37 (78–94), 2.31 (77–59) and 0.32 (2–58) mv/% RH. A1samples have low hysteresis with response and recovery time of about 24 and 33 sec respectively. They have shown good repeatability over 7 cycles and reproducibility for two samples.

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来源期刊

2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)

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