Journal ArticleDOI
Design of Hetero-Nanostructures on MoS2 Nanosheets To Boost NO2 Room-Temperature Sensing.
Yutong Han,Da Huang,Yujie Ma,Guili He,Jun Hu,Jing Zhang,Nantao Hu,Yanjie Su,Zhihua Zhou,Yafei Zhang,Zhi Yang +10 more
Reads0
Chats0
TLDR
A novel p-n hetero-nanostructure on MoS2 NSs is designed using interface engineering via a simple wet chemical method, endowed with an excellent response and improves recoverability to more than 90%, which is rare for room-temperature gas sensors.Abstract:
Molybdenum disulfide (MoS2), as a promising gas-sensing material, has gained intense interest because of its large surface-to-volume ratio, air stability, and various active sites for functionalization. However, MoS2-based gas sensors still suffer from low sensitivity, slow response, and weak recovery at room temperature, especially for NO2. Fabrication of heterostructures may be an effective way to modulate the intrinsic electronic properties of MoS2 nanosheets (NSs), thereby achieving high sensitivity and excellent recovery properties. In this work, we design a novel p-n hetero-nanostructure on MoS2 NSs using interface engineering via a simple wet chemical method. After surface modification with zinc oxide nanoparticles (ZnO NPs), the MoS2/ZnO hetero-nanostructure is endowed with an excellent response (5 ppm nitrogen dioxide, 3050%), which is 11 times greater than that of pure MoS2 NSs. To the best of our knowledge, such a response value is much higher than the response values reported for MoS2 gas sensors. Moreover, the fabricated hetero-nanostructure also improves recoverability to more than 90%, which is rare for room-temperature gas sensors. Our optimal sensor also possesses the characteristics of an ultrafast response time of 40 s, a reliable long-term stability within 10 weeks, an excellent selectivity, and a low detection concentration of 50 ppb. The enhanced sensing performances of the MoS2/ZnO hetero-nanostructure can be ascribed to unique 2D/0D hetero-nanostructures, synergistic effects, and p-n heterojunctions between ZnO NPs and MoS2 NSs. Such achievements of MoS2/ZnO hetero-nanostructure sensors imply that it is possible to use this novel nanostructure in ultrasensitive sensor applications.read more
Citations
More filters
Journal ArticleDOI
Recent advances in energy-saving chemiresistive gas sensors: A review
TL;DR: Different types of energy-saving chemisresitive gas sensors and their application in the fields of environmental monitoring are discussed.
Journal ArticleDOI
Gas sensing with heterostructures based on two-dimensional nanostructured materials: a review
Atanu Bag,Nae-Eung Lee +1 more
TL;DR: A comprehensive review of recent progress in gas sensors with advanced heterostructures based on 2D nanostructured materials is presented in this paper, where the fundamental sensing mechanisms of different types of gas sensors are systematically discussed, and key device architectures and their performances are summarized.
Journal ArticleDOI
MOF-Derived Indium Oxide Hollow Microtubes/MoS2 Nanoparticles for NO2 gas sensing
TL;DR: In this paper, a metal-organic frameworks-derived indium oxide hollow microtubes/molybdenum disulfide nanoparticles (In2O3/MoS2) nanocomposite film sensor using a layer-by-layer self-assembly method.
Journal ArticleDOI
Environmental Analysis with 2D Transition-Metal Dichalcogenide-Based Field-Effect Transistors
TL;DR: An overview on TMDC sensors for a wide variety of analytes with an emphasize on the increasing demand of advanced sensing technologies in environmental analysis.
Journal ArticleDOI
SnS2/SnS p–n heterojunctions with an accumulation layer for ultrasensitive room-temperature NO2 detection
Quan Sun,Jiaxin Wang,Juanyuan Hao,Shengliang Zheng,Peng Wan,Tingting Wang,Hai-Tao Fang,You Wang,You Wang +8 more
TL;DR: An ultrasensitive and fully recoverable room-temperature NO2 gas sensor based on SnS2/SnS p-n heterojunctions with an accumulation layer was fabricated and showed good selectivity and long-term stability.
References
More filters
Journal ArticleDOI
Two-Dimensional Nanosheets Produced by Liquid Exfoliation of Layered Materials
Jonathan N. Coleman,Mustafa Lotya,Arlene O’Neill,Shane D. Bergin,Shane D. Bergin,Paul J. King,Umar Khan,Karen Young,Anne Gaucher,Sukanta De,Ronan J. Smith,Igor V. Shvets,Sunil K. Arora,George Stanton,Hye-Young Kim,Hye-Young Kim,Kangho Lee,Kangho Lee,Gyu Tae Kim,Georg S. Duesberg,Toby Hallam,John J. Boland,Jing Jing Wang,John F. Donegan,Jaime C. Grunlan,Gregory P. Moriarty,Aleksey Shmeliov,Rebecca J. Nicholls,J M Perkins,Eleanor M. Grieveson,Koenraad Theuwissen,David W. McComb,Peter D. Nellist,Valeria Nicolosi +33 more
TL;DR: It is shown that WS2 and MoS2 effectively reinforce polymers, whereas WS2/carbon nanotube hybrid films have high conductivity, leading to promising thermoelectric properties.
Journal ArticleDOI
Anomalous lattice vibrations of single- and few-layer MoS2.
TL;DR: This work exemplifies the evolution of structural parameters in layered materials in changing from the three-dimensional to the two-dimensional regime by characterized by Raman spectroscopy.
Journal ArticleDOI
Ultrathin Two-Dimensional Nanomaterials.
TL;DR: The state of the art in the development of ultrathin 2D nanomaterials is reviewed and their unique advantages are highlighted, together with some personal insights on the challenges in this research area.
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.
Journal ArticleDOI
Nanoscale metal oxide-based heterojunctions for gas sensing: A review
TL;DR: In this paper, the dominant electronic and chemical mechanisms that influence the performance of metal-oxide-based resistive-type gas sensors are discussed, including p-n and n-n potential barrier manipulation, n-p-n response type inversions, spillover effects, synergistic catalytic behavior, and microstructure enhancement.