Article
Engineering, Electrical & Electronic
Suraj Kumar Lalwani, Ajit Debnath, Vyom kumar Gupta, Sunny
Summary: In this study, SnO2-ZnO composite solutions with different viscosity were synthesized and the thickness of electrospun nanofibers was optimized to achieve uniformly distributed fibers without bead-like structures. The nanofibers of 75 to 250 nm were successfully deposited on Interdigitated gold electrode (IDGE) for ethanol sensing. The effect of fiber width on the sensing properties was investigated to determine the optimum fiber thickness. The SnO2-ZnO nanofibers-based sensor, with an average thickness of 106.2 nm, showed a response of 41.66% towards 0.5 ppm ethanol with a fast response time of 11 s. The sensor exhibited significant selectivity towards ethanol compared to other volatile organic compounds (VOCs). The crystallographic structure, valence states analysis, and surface morphology were characterized using XRD, XPS, and FESEM. The formation of n-n heterojunction was found to enhance the sensor response, and the ethanol sensing mechanism based on redox reaction at the surface and heterojunction interface was presented.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Analytical
Qichao Li, Di Chen, Jianmin Miao, Shujing Lin, Zixian Yu, Daxiang Cui, Zhi Yang, Xianping Chen
Summary: A high-performance gas sensor based on ordered porous ZnO nanosheets with fast response and high sensitivity for ethanol detection applications is presented in this study.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
G. X. Wan, Y. Feng, F. F. Zhang, X. W. Sun, Y. X. Li, R. J. Xue
Summary: ZnO/CeO2 and Ag/ZnO/CeO2 nanocomposites were successfully synthesized via hydrothermal method and characterized. Ag/ZnO/CeO2 nanoparticles with a size of 54 nm were obtained. Gas sensors based on the nanocomposites were fabricated and their ethanol sensing properties were investigated.
Article
Chemistry, Analytical
Jinniu Zhang, Deying Leng, Gang Li, Jia Liu, Hongjun Wang, Yuanyuan Zhu, Hongbing Lu, Jianzhi Gao, Benpeng Zhu
Summary: This study successfully constructed porous Co3O4-ZnO heterojunction nanofibers with unique nanostructures and abundant porosities using a combination of bimetal-organic framework and electrospinning technique. The resulting nanofibers exhibited superior ethanol sensing properties, good selectivity, and stability due to the formation of Co3O4-ZnO p-n heterojunctions and unique nanofiber structure with abundant pores.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Xianfeng Zhang, Wenjie Du, Qian Li, Changpeng Lv
Summary: This study proposes precursor pyrolysis, ultrasonic exfoliation, hydrothermal, and high-temperature calcination methods to fabricate g-C3N4/ZnO composites with excellent gas sensing properties. The composition and structure of the composites were characterized, and it was found that 1% doping of g-C3N4 achieved the best sensing performance at 280 degrees C, with a response of 81.4 to 100 ppm ethanol. The sensor also exhibited fast response and recovery speeds, as well as good selectivity.
Article
Chemistry, Multidisciplinary
Xin-Yu Huang, Ya-Ru Kang, Shu Yan, Ahmed Elmarakbi, Yong-Qing Fu, Wan-Feng Xie
Summary: Metal-organic framework (MOF)-derived trimetallic FeCoNi oxides (FCN-MOS) with a mesoporous structure were synthesized through one-step hydrothermal reaction and calcination. The FCN-MOS system consists of three main phases, alpha-Fe2O3 (n-type), CoFe2O4, and NiFe2O4 (p-type), and the nanostructure and pore size can be controlled by altering the content of alpha-Fe2O3, CoFe2O4, and NiFe2O4. The sensors based on FCN-MOS exhibit a high response of 71.9, good selectivity towards 100 ppm ethanol at 250 degrees C, and long-term stability up to 60 days. Additionally, the FCN-MOS-based sensors show a p-n transition gas sensing behavior with the alteration of the Fe/Co/Ni ratio.
Article
Engineering, Electrical & Electronic
Ke Zhang, Yu Shen, Yunsheng Li, Wenrui Zhang
Summary: This study successfully synthesized ZnO@In2O3 heterojunction nanocomposites with ultra-sensitive response to ethanol. The unique structure and characteristics of the composites contribute to their excellent gas sensing properties, including improved sensitivity, reduced energy consumption, and excellent repeatability and stability.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Review
Materials Science, Multidisciplinary
Xinguang Huang, Rui Pang, Mengdan Yang, Shipeng Zhang, Fengmei Guo, Jie Xu, Yingjiu Zhang, Anyuan Cao, Yuanyuan Shang
Summary: This paper reviews recent advances in flexible gas sensors based on carbon nanotube (CNT) films. It discusses the design of flexible CNT film structures and strategies to improve flexibility and stretchability. The paper summarizes the different types of sensitive materials loaded on CNT films and their gas sensing mechanism. It also explores the preparation of CNT self-standing films and the use of flexible substrates. The results show that CNT films exhibit remarkable response and flexibility to hazardous or greenhouse gases. The paper concludes with a summary and perspectives on the future development of flexible gas sensors based on CNT films.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Ming-Hsien Li, Lin-Sin Lu, Chang-Hsueh Lee, Ding-Yuan Tsai, Jia-Jie Jhang, Deng-Yi Wang, Yung-Sen Lin, Yung-Hui Li, Hsiang Chen
Summary: In this study, ZnO nanorods (NRs) were grown on a ZnO seed layer incorporating carbon nanotubes (CNTs). The presence of CNTs in the seed layer resulted in enhanced oxygen defect-related chemical bindings and defect-related photoluminescence (PL) intensity. The improved oxygen defects in the ZnO NRs on CNT-incorporated seed layer led to enhanced light/gas dual-sensing behaviors. This study demonstrates the promise of light/gas dual-sensing chips with ZnO NRs on CNT-incorporated seed layer for UV light and gas detection.
RESULTS IN PHYSICS
(2022)
Review
Chemistry, Physical
Y. Shi, X. Li, X. F. Sun, X. Shao, H. Y. Wang
Summary: Detection of ethanol is crucial in various fields due to its explosive, colorless and volatile nature. Metal oxide semiconductors (MOS) gas sensors, particularly those based on indium oxide (In2O3), have gained attention for their low cost and convenient detection. This paper summarizes the strategies used in the last decade to enhance the performance of In2O3-based gas sensors for ethanol detection, including morphology modification, doping, heterojunction construction, and the use of composite materials. The sensing mechanism for ethanol detection by gas sensors is also presented.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Amanda Akemy Komorizono, Bruno Sanches de Lima, Valmor Roberto Mastelaro
Summary: Gas sensors based on graphene nanocomposites have been widely investigated for the detection of different gases. However, there is limited research on using graphene-based materials for ozone detection due to the permanent oxidation reaction between ozone and carbon atoms in the graphene structure, which leads to material degradation and poor sensing stability. This study presents new techniques for using rGO-ZnO nanocomposites for ozone detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Ceramics
Zahra Rafiee, Hossein Roshan, Mohammad Hossein Sheikhi
Summary: Growing zinc oxide nanowires on graphene nanosheets can increase the response and decrease the working temperature of gas sensors. The nanocomposite gas sensor shows higher response and lower working temperature towards ethanol vapor, with a detection limit as low as 1 ppm. The sensor also exhibits excellent stability and repeatability, making it a promising candidate for practical applications.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Environmental
Pil Gyu Choi, Akihiro Tsuruta, Yoshitake Masuda
Summary: Detection and discrimination of gases are crucial in various fields and the demand for easy and fast detection of various gas substances is increasing. This study improved the sensing property by modifying carbon nanotubes (CNT) with nanosheet-type tin oxide (SnO2), resulting in superior sensing properties and improved selectivity for ammonia gas. The accuracy of ammonia gas classification was significantly increased when using the modified sensor in the sensor array, showing its potential for ammonia gas detection and discrimination.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Analytical
Shichao Wang, Xiaohu Wang, Gaoqun Qiao, Xiaoyan Chen, Xinzhen Wang, Hongzhi Cui
Summary: Core-double shell-structured ZnO@In2O3@ZnO microspheres were successfully synthesized by decorating In2O3 and ZnO on the surface of ZnO hollow microspheres, exhibiting excellent gas sensing properties with high response to gases like ethanol, especially at low concentrations. This superior gas sensing performance was attributed to its high specific surface area, abundant surface defects, and radial electronic modulation mechanism.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Nanoscience & Nanotechnology
Junfeng Chao, Haijun Yu, Ke Zhang, Ying Zhou, Deshuo Meng, Yeguo Sun
Summary: Zinc oxide hollow microspheres (ZnO HMPs) were synthesized using a carbon microsphere-assisted soaking route and annealed process. The as-synthesized HMP sensor exhibited good response to ethanolamine. Loading Au nanoparticles improved the sensing performances of Au-modified zinc oxide (Au/ZnO) products.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Bohr-Ran Huang, Cheng-Liang Hsu, Yu-Kang Wang, Wen-Luh Yang
IEEE SENSORS JOURNAL
(2017)
Article
Engineering, Biomedical
Sin-Hui Wang, Shoou-Jinn Chang, Cheng-Liang Hsu, Yu-Jui Fang
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2018)
Article
Chemistry, Physical
Cheng-Liang Hsu, I-Long Su, Ting-Jen Hsueh
JOURNAL OF ALLOYS AND COMPOUNDS
(2017)
Article
Chemistry, Physical
Cheng-Liang Hsu, Yu-Jui Fang, Ting-Jen Hsueh, Sin-Hui Wang, Shoou-Jinn Chang
JOURNAL OF PHYSICAL CHEMISTRY B
(2017)
Article
Chemistry, Analytical
Cheng-Liang Hsu, Jin-Hong Lin, Duo-Xi Hsu, Sin-Hui Wang, Siou-Yi Lin, Ting-Jen Hsueh
SENSORS AND ACTUATORS B-CHEMICAL
(2017)
Article
Chemistry, Analytical
Cheng-Liang Hsu, Bo-Yu Jhang, Cheng Kao, Ting-Jen Hsueh
SENSORS AND ACTUATORS B-CHEMICAL
(2018)
Article
Chemistry, Multidisciplinary
Cheng-Liang Hsu, Yen-Cheng Chuo, Liang-Wei Hsu, Yen-Liang Pan, Yi-Hung Liu
ADVANCED MATERIALS INTERFACES
(2019)
Article
Engineering, Electrical & Electronic
Cheng-Liang Hsu, Jia-Xin Gan, Han-Ting Hsueh, Yi-Hung Liu
Summary: In this study, p-type amorphous structure Co3O4 nanoflowers were synthesized on n-type single crystal ZnO nanowires/glass substrate using chemical bath deposition. The humidity sensing of the p-n nanocomposite exhibited p-type characteristics at lower than 50% RH, and n-type properties at higher than 50% RH. The p-n nanocomposite sensor showed good sensing ability for various organic solvent gases, with ethanol being the most sensitive.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Jian-Fu Tang, Yi-Da Sie, Zong-Liang Tseng, Ja-Hon Lin, Lung-Chien Chen, Cheng-Liang Hsu
Summary: In this study, a photodetector and humidity sensor based on zinc oxide nanowires (ZnO NWs) with CsPbBr3 perovskite quantum dots (PQDs) were developed. The excellent optoelectronic properties of PQDs make them ideal for semiconductor sensors. The experimental results showed that the performance of PQD/ZnO NWs was superior to that of ZnO NWs, especially in terms of humidity response and photocurrent.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Cheng-Liang Hsu, Yu-Che Wang, Sheng-Po Chang, Shoou-Jinn Chang
ACS APPLIED NANO MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Bohr-Ran Huang, Jinn P. Chu, Cheng-Liang Hsu, Joseph E. Greene, You-Syuan Chen, Chia-Hao Chang
JOURNAL OF MATERIALS CHEMISTRY C
(2019)
Article
Chemistry, Physical
Cheng-Liang Hsu, Hsin-Yu Wu, Chung-Cheng Fang, Sheng-Po Chang
ACS APPLIED ENERGY MATERIALS
(2018)
Article
Nanoscience & Nanotechnology
Bohr-Ran Huang, Jinn P. Chu, Cheng-Liang Hsu, You-Syuan Chen, Chia-Hao Chang
ACS APPLIED MATERIALS & INTERFACES
(2017)
Article
Nanoscience & Nanotechnology
Cheng-Liang Hsu, Yu-Hong Lin, Liang-Kai Wang, Ting-Jen Hsueh, Sheng-Po Chang, Shoou-Jinn Chang
ACS APPLIED MATERIALS & INTERFACES
(2017)
Article
Materials Science, Ceramics
Cheng-Liang Hsu, Duo-Xi Hsu, Ting-Jen Hsueh, Sheng-Po Chang, Shoou-Jinn Chang
CERAMICS INTERNATIONAL
(2017)