Saqib Muhammad, Ali Khan Shenawar, Mutee Ur Rehman Hafiz Mohammad, Yang Yunsook, Kim Seongwan, Rehman Muhammad Muqeet, Young Kim Woo
Faculty of Applied Energy System, Major of Electronic Engineering, Jeju National University, Jeju 63243, Korea.
Department of Electronic Engineering, Jeju National University, Jeju 63243, Korea.
Nanomaterials (Basel). 2021 Jan 18;11(1):242. doi: 10.3390/nano11010242.
Performance of an electronic device relies heavily on the availability of a suitable functional material. One of the simple, easy, and cost-effective ways to obtain novel functional materials with improved properties for desired applications is to make composites of selected materials. In this work, a novel composite of transparent n-type zinc oxide (ZnO) with a wide bandgap and a unique structure of graphene in the form of a graphene flower (GrF) is synthesized and used as the functional layer of a humidity sensor. The (GrF/ZnO) composite was synthesized by a simple sol-gel method. Morphological, elemental, and structural characterizations of GrF/ZnO composite were performed by a field emission scanning electron microscope (FESEM), energy-dispersive spectroscopy (EDS), and an x-ray diffractometer (XRD), respectively, to fully understand the properties of this newly synthesized functional material. The proposed humidity sensor was tested in the relative humidity (RH) range of 15% RH% to 86% RH%. The demonstrated sensor illustrated a highly sensitive response to humidity with an average current change of 7.77 μA/RH%. Other prominent characteristics shown by this device include but were not limited to high stability, repeatable results, fast response, and quick recovery time. The proposed humidity sensor was highly sensitive to human breathing, thus making it a promising candidate for various applications related to health monitoring.
电子设备的性能在很大程度上依赖于合适功能材料的可用性。获得具有改进性能以满足所需应用的新型功能材料的一种简单、易行且经济高效的方法是制备所选材料的复合材料。在这项工作中，合成了一种新型复合材料，它由具有宽带隙的透明n型氧化锌（ZnO）和呈石墨烯花（GrF）形式的独特结构的石墨烯组成，并用作湿度传感器的功能层。（GrF/ZnO）复合材料通过简单的溶胶 - 凝胶法合成。分别用场发射扫描电子显微镜（FESEM）、能量色散光谱（EDS）和X射线衍射仪（XRD）对GrF/ZnO复合材料进行形态、元素和结构表征，以全面了解这种新合成功能材料的性能。所提出的湿度传感器在15%相对湿度（RH）至86%相对湿度的范围内进行了测试。所展示的传感器对湿度表现出高度敏感的响应，平均电流变化为7.77 μA/RH%。该设备显示的其他突出特性包括但不限于高稳定性、可重复的结果、快速响应和快速恢复时间。所提出的湿度传感器对人体呼吸高度敏感，因此使其成为与健康监测相关的各种应用的有前途的候选者。
