纳米线
材料科学
锌
扫描电子显微镜
化学工程
异质结
电化学
相对湿度
阳极氧化
分析化学(期刊)
纳米技术
光电子学
复合材料
有机化学
化学
铝
电极
物理化学
物理
工程类
热力学
冶金
作者
Orhan Şişman,Necmettin Kılınç,Ünal Özden Akkuş,Jordi Samà,A. Romano-Rodrı́guez,Devrim Atílla,Ayşe Gül Gürek,Vefa Ahsen,Savaş Berber,Zafer Ziya Öztürk
标识
DOI:10.1016/j.snb.2021.130431
摘要
A novel organic-inorganic hybrid conductometric NO2 sensor has been introduced by depositing liquid-crystalline zinc oktakisalkylthiophthalocyanine [(C6S)8PcZn] on the surface of Cu2O nanowires. Cu2O nanowires were synthesized by electrochemical anodization of Cu films on glass substrates. Surface structures of bare Cu2O and (C6S)8[email protected]2O nanowires hybrid structures were monitored by scanning electron microscope (SEM). UV–vis spectrophotometer measurements revealed the heterostructure formation by comparing the absorption profiles of bare Cu2O nanowires, (C6S)8PcZn thin film, and (C6S)8[email protected]2O hybrid nanowires. The interdigitated transducers (IDT) were used for conductometric gas measurements. The sensing properties of all samples were investigated towards 500 ppb, 1 ppm, 2 ppm, and 5 ppm NO2 under dry airflow in 30 °C, 50 °C, 100 °C, and 150 °C. The measurements at 150 °C were repeated for (C6S)8PcZn film and hybrid sample using the same concentrations of NO2 gas under 38 % relative humidity airflow. In addition, selectivity of hybrid sensor was confirmed with carbon monoxide (CO), hydrogen (H2) and ethanol (C2H5OH) measurements. Our density functional theory calculations indicate that S atoms play a crucial role in improving the sensor response. The sensing properties and sensing mechanisms of samples were compared and discussed.
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