Journal ArticleDOI
Self-Assembled Hierarchical Interfaces of ZnO Nanotubes/Graphene Heterostructures for Efficient Room Temperature Hydrogen Sensors.
TLDR
The salient features of this self-assembled nanostructure are its reliability, simple synthesis method, and long-term stability, which makes it a promising candidate for new generation hydrogen sensors and hydrogen storage materials.Abstract:
Herein, we report the novel nanostructural interfaces of self-assembled hierarchical ZnO nanotubes/graphene (ZNT/G) with three different growing times of ZNTs on graphene substrates (namely, SH1, SH2, and SH3). Each sample was fabricated with interdigitated electrodes to form hydrogen sensors, and their hydrogen sensing properties were comprehensively studied. The systematic investigation revealed that SH1 sensor exhibits an ultrahigh sensor response even at a low detection level of 10 ppm (14.3%) to 100 ppm (28.1%) compared to those of the SH2 and SH3 sensors. The SH1 sensor was also found to be well-retained with repeatability, reliability, and long-term stability of 90 days under hydrogenation/dehydrogenation processes. This outstanding enhancement in sensing properties of SH1 is attributed to the formation of a strong metalized region in the ZNT/G interface due to the inner/outer surfaces of ZNTs, establishing a multiple depletion layer. Furthermore, the respective band models of each nanostructure we...read more
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Journal ArticleDOI
Flexible Graphene-Based Wearable Gas and Chemical Sensors
TL;DR: The role of graphene in fabricating flexible gas sensors for the detection of various hazardous gases, including nitrogen dioxide, ammonia, hydrogen, hydrogen sulfide, carbon dioxide, sulfur dioxide, and humidity in wearable technology, is discussed.
Journal ArticleDOI
Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature
Zhijie Li,Hao Li,Zhonglin Wu,Mingkui Wang,Jingting Luo,Hamdi Torun,PingAn Hu,Chang Yang,Marius Grundmann,Xiaoteng Liu,Yong Qing Fu,Yong Qing Fu +11 more
TL;DR: In this paper, the authors highlight the designs and mechanisms of different SMONs with various patterns (e.g., nanoparticles, nanowires, nanosheets, nanorods, nanotubes, nanofilms, etc.) for gas sensors to detect various hazardous gases at room temperature.
Journal ArticleDOI
Oxygen Vacancies Enabled Porous SnO2 Thin Films for Highly Sensitive Detection of Triethylamine at Room Temperature.
Yongshan Xu,Lingli Zheng,Chen Yang,Wei Zheng,Xianghong Liu,Xianghong Liu,Jun Zhang,Jun Zhang +7 more
TL;DR: The overall performances surpass most previous reports on TEA detection at RT, and can be attributed to the porous structure with abundant oxygen vacancies, which can improve the adsorption of molecules.
Journal ArticleDOI
Improved Sensitivity with Low Limit of Detection of a Hydrogen Gas Sensor Based on rGO-Loaded Ni-Doped ZnO Nanostructures.
Vijendra Singh Bhati,Sapana Ranwa,Saravanan Rajamani,Kusum Kumari,Ramesh Raliya,Pratim Biswas,Mahesh Kumar +6 more
TL;DR: In this paper, an enhanced hydrogen-gas-sensing performance of a Ni-doped ZnO sensor decorated with the optimum concentration of reduced graphene oxide (rGO) was reported.
Journal ArticleDOI
Chemiresistive Hydrogen Sensors: Fundamentals, Recent Advances, and Challenges.
TL;DR: This review highlights the advances in H2 chemiresistors, including metal-, semiconducting metal oxide-, carbon-based materials, and other materials and emphasizes key advances and strategies to develop superior H2 sensors.
References
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Zinc Oxide Nanostructures for NO2 Gas–Sensor Applications: A Review
TL;DR: Various factors such as NO2 concentrations, annealing temperature, ZnO morphologies and particle sizes, relative humidity, operating temperatures which are affecting the NO2 gas sensing properties are discussed in this review.
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TL;DR: In this article, the authors discuss the current development of graphene-based metal and metal oxide nanocomposites, with a detailed account of their synthesis and properties, including their applications in various fields including electronics, electrochemical and electrical fields.
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A Review on Graphene-Based Gas/Vapor Sensors with Unique Properties and Potential Applications
Tao Wang,Da Huang,Zhi Yang,Shusheng Xu,Guili He,Xiaolin Li,Nantao Hu,Guilin Yin,Dannong He,Liying Zhang +9 more
TL;DR: Recent advantages in graphene preparation, sensor construction, and sensing properties of various graphene-based gas/vapor sensors, such as NH3, NO2, H2, CO, SO2,H2S, as well as vapor of volatile organic compounds are summarized.
Journal ArticleDOI
Hydrogen Gas Sensors Based on Semiconductor Oxide Nanostructures
TL;DR: A comprehensive review of the research progress in the last five years concerning hydrogen gas sensors based on SMO thin film and one-dimensional (1D) nanostructures is provided.