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Humidity sensing enhancement and structural evolution of tungsten doped ZnO nanosensors fabricated through co-precipitation synthesis
Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2021-06-28 , DOI: 10.1016/j.physb.2021.413224
Vernica Verma , Narendra Kumar Pandey , Priya Gupta , Kuldeep Singh , Peramjeet Singh

In this work, pure and tungsten (W) doped ZnO nano-crystals have been synthesized through the co-precipitation technique. The prepared samples are employed to study the effect of tungsten doping on the structural, morphological, and humidity sensing properties of ZnO nanomaterials. The structural and morphological studies have been carried out using X-ray Diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM), respectively. The XRD of the synthesized nanomaterials reveals a hexagonal wurtzite structure and a reduction of crystallite size from 44.46 nm to 37.38 nm with increase in doping concentration. The SEM images reveal a cuboidal columnar growth. Finally, the samples have been exposed to a humidity range from 10% to 90% RH and observed that the sensitivity of the sensor is enhanced as the concentration of tungsten is increased. The sample doped with 1.75 mol% tungsten demonstrates the highest sensitivity of 144% among all the samples with good stability.



中文翻译:

通过共沉淀合成制备的掺钨 ZnO 纳米传感器的湿度传感增强和结构演变

在这项工作中,通过共沉淀技术合成了纯和钨 (W) 掺杂的 ZnO 纳米晶体。制备的样品用于研究钨掺杂对 ZnO 纳米材料的结构、形态和湿度传感性能的影响。分别使用 X 射线衍射 (XRD) 和场发射扫描电子显微镜 (FESEM) 进行了结构和形态研究。合成纳米材料的 XRD 显示出六方纤锌矿结构,随着掺杂浓度的增加,晶粒尺寸从 44.46 nm 减小到 37.38 nm。SEM 图像显示立方柱状生长。最后,样品暴露在 10% 到 90% RH 的湿度范围内,观察到随着钨浓度的增加,传感器的灵敏度会增强。在所有具有良好稳定性的样品中,掺入 1.75 mol% 钨的样品表现出最高的灵敏度,为 144%。

更新日期:2021-07-01
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