材料科学
电压
电阻式触摸屏
响应时间
石墨烯
光电子学
偏压
氢
氢传感器
纳米技术
电气工程
化学
计算机科学
工程类
钯
生物化学
计算机图形学(图像)
有机化学
催化作用
作者
Nada AbuHamra,Heba Abunahla,Ashraf Ali,Waqas Waheed,Saleh T. Mahmoud,Anas Alazzam,Baker Mohammad
出处
期刊:IEEE Sensors Journal
[Institute of Electrical and Electronics Engineers]
日期:2023-12-15
卷期号:23 (24): 30093-30101
标识
DOI:10.1109/jsen.2023.3328869
摘要
In recent years, there has been a growing interest in investigating the potential of emerging memristor (MR) devices for gas sensing applications, particularly at room temperature. This article reports on a planar Au/reduced graphene oxide (rGO)/Au memristive hydrogen sensor, fabricated on a cost-effective cyclic olefin copolymer (COC) substrate, and utilizing the rGO green carbon material as its active sensing element. The sensor’s performance is evaluated using two different testing modes: conventional chemiresistive testing under a constant voltage bias (CVB) and voltage pulse (VP) modes. The CVB mode demonstrates high repeatability, selectivity, response time, and recovery time, indicating the sensor’s reliable gas sensing capabilities. In addition, the VP mode significantly enhances the sensor’s relative percentage response, indicating its potential for improved gas sensing performance. To optimize the sensor’s response, the impact of hydrogen exposure on the MR resistive switching is studied, revealing that the effect is contingent on the VP amplitude. Specifically, gas-enhanced resistive switching is achieved at lower voltage levels, whereas at higher voltage levels, gas exposure slows down the rate of resistive switching. Consequently, voltage-pulse testing is conducted at two voltage magnitudes, low (2.5 V) and high (4.5 V), and the sensor’s response is enhanced from 0.5% under CVB mode to 786% under VP mode.
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