Graphene Oxide Humidity Sensor: Effect of Substrates

IF 2.2 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Electronic Materials Pub Date : 2024-11-14 DOI:10.1007/s11664-024-11552-5

Punam Tiwary, Amit K. Chakraborty, Holly J. Edwards, Vinod R. Dhanak, Rajat Mahapatra

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Abstract

A graphene oxide (GO)-based humidity sensor is reported in this work wherein the influence of the substrate on its humidity-sensing properties is compared by depositing a GO film on two different substrates: glass and wearable fabric. While the GO film exhibits sensitivity to humidity for both substrates, its response varies from 35% for the glass substrate to 74% for wearable fabric at 60% relative humidity (RH), clearly indicating the superiority of the wearable fabric over glass. The sensors (on both substrates) show almost no sensitivity to several common volatile organic compounds (VOCs) and gases, suggesting their high selectivity towards humidity. In both cases, the sensor can detect humidity with high repeatability over several cycles and exhibits fast response and recovery times of 6 s/10 s and 7 s/12 s for glass and wearable fabric, respectively. The sensing mechanism is explained in terms of pre-adsorbed surface oxygen ions, as measured by the change in water signal upon exposure of the GO film to humidity using Fourier transform infrared (FTIR) spectroscopy. Thus, we demonstrate that the developed GO film on wearable fabric can act as a low-cost, flexible, and wearable humidity sensor with good sensitivity, reproducibility, and selectivity.

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氧化石墨烯湿度传感器：衬底效应

本文报道了一种基于氧化石墨烯（GO）的湿度传感器，通过将氧化石墨烯薄膜沉积在两种不同的基材（玻璃和可穿戴织物）上，比较了基材对其湿度传感性能的影响。虽然氧化石墨烯薄膜对两种基材的湿度都很敏感，但在60%相对湿度（RH）下，玻璃基材的响应率为35%，可穿戴织物的响应率为74%，这清楚地表明可穿戴织物优于玻璃。传感器（在两个衬底上）对几种常见的挥发性有机化合物（VOCs）和气体几乎没有敏感性，表明它们对湿度的高选择性。在这两种情况下，传感器可以在几个周期内以高重复性检测湿度，并且对玻璃和可穿戴织物分别具有6 s/10 s和7 s/12 s的快速响应和恢复时间。利用傅里叶变换红外光谱（FTIR）测量氧化石墨烯薄膜暴露于湿度时水信号的变化，从预吸附表面氧离子的角度解释了传感机制。因此，我们证明了在可穿戴织物上开发的氧化石墨烯薄膜可以作为一种低成本、柔性和可穿戴的湿度传感器，具有良好的灵敏度、再现性和选择性。图形抽象

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来源期刊

Journal of Electronic Materials 工程技术-材料科学：综合

CiteScore

4.10

自引率

4.80%

发文量

693

审稿时长

3.8 months

期刊介绍： The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.