Journal ArticleDOI
Improvement of Gas-Sensing Performance of Large-Area Tungsten Disulfide Nanosheets by Surface Functionalization
Kyung Yong Ko,Jeong Gyu Song,Youngjun Kim,Taejin Choi,Sera Shin,Chang Wan Lee,Kyounghoon Lee,Jahyun Koo,Hoonkyung Lee,Jongbaeg Kim,Taeyoon Lee,Jusang Park,Hyungjun Kim +12 more
TLDR
This work demonstrates the improvement of gas-sensing performance of large-area tungsten disulfide (WS2) nanosheets through surface functionalization using Ag nanowires (NWs) to improve 2D TMDC gas sensors.Abstract:
Semiconducting two-dimensional (2D) transition metal dichalcogenides (TMDCs) are promising gas-sensing materials due to their large surface-to-volume ratio. However, their poor gas-sensing performance resulting from the low response, incomplete recovery, and insufficient selectivity hinders the realization of high-performance 2D TMDC gas sensors. Here, we demonstrate the improvement of gas-sensing performance of large-area tungsten disulfide (WS2) nanosheets through surface functionalization using Ag nanowires (NWs). Large-area WS2 nanosheets were synthesized through atomic layer deposition of WO3 followed by sulfurization. The pristine WS2 gas sensors exhibited a significant response to acetone and NO2 but an incomplete recovery in the case of NO2 sensing. After AgNW functionalization, the WS2 gas sensor showed dramatically improved response (667%) and recovery upon NO2 exposure. Our results establish that the proposed method is a promising strategy to improve 2D TMDC gas sensors.read more
Citations
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Journal ArticleDOI
Two-Dimensional Nanostructured Materials for Gas Sensing
TL;DR: In this article, a review of the most recent advancements in utilization of various 2D nanomaterials for gas sensing is provided, where the focus is on the sensing performances provided by devices integrating 2D Nanostructures.
Journal ArticleDOI
A review on chemiresistive room temperature gas sensors based on metal oxide nanostructures, graphene and 2D transition metal dichalcogenides
Nirav Joshi,Nirav Joshi,Takeshi Hayasaka,Yumeng Liu,Huiliang Liu,Huiliang Liu,Osvaldo N. Oliveira,Liwei Lin,Liwei Lin +8 more
TL;DR: The review summarizes the most significant progresses related to room temperature gas sensing by using hierarchical oxide nanostructures, graphene and its derivatives and 2D transition metal dichalcogenides, highlighting the peculiar gas sensing behavior with enhanced selectivity, sensitivity and long-term stability.
Journal ArticleDOI
Electrically-Transduced Chemical Sensors Based on Two-Dimensional Nanomaterials
TL;DR: Key advances in the application of 2D materials, from both a historical and analytical perspective, are summarized for four different groups of analytes: gases, volatile compounds, ions, and biomolecules.
Journal ArticleDOI
Layer-by-Layer Assembled Conductive Metal-Organic Framework Nanofilms for Room-Temperature Chemiresistive Sensing.
TL;DR: The controllable thin-film fabrication of an EC-MOF, Cu3 (HHTP)2, by a spray layer-by-layer liquid-phase epitaxial method is reported and the chemiresistor gas sensor based on this high-quality thin film is one of the best room-temperature sensors for NH3 among all reported sensors based on various materials.
Journal ArticleDOI
Metal-Organic Frameworks for Chemiresistive Sensors
TL;DR: A comprehensive overview and recent progress in chemiresistive sensors developed by using pure metal-organic frameworks (MOFs), MOF membranes, and MOF derivatives can be found in this article.
References
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Journal ArticleDOI
Fabrication of Single‐ and Multilayer MoS2 Film‐Based Field‐Effect Transistors for Sensing NO at Room Temperature
Hai Li,Zongyou Yin,Qiyuan He,Hong Li,Xiao Huang,Gang Lu,Derrick Wen Hui Fam,Alfred Iing Yoong Tok,Qing Zhang,Hua Zhang +9 more
TL;DR: Although the single-layer MoS(2) device shows a rapid response after exposure to NO, the current was found to be unstable, and these FET devices can be used as gas sensors to detect nitrous oxide.