Journal ArticleDOI
Boosting Sensing Performance of Vacancy-Containing Vertically Aligned MoS 2 Using rGO Particles
Rajesh Kumar,Neeraj Goel,Abhay V. Agrawal,Ramesh Raliya,Saravanan Rajamani,Govind Gupta,Pratim Biswas,Mukesh Kumar,Mahesh Kumar +8 more
TLDR
In this paper, a high-performance NO2 gas sensor using a hybrid of temperature-assisted sulfur vacancy within the edge-oriented vertically aligned MoS2 (Sv-MoS2) and crumpled reduced graphene oxide (rGO) particles was reported.Abstract:
A design of an advanced sensing material, such as MoS2, is imperative to enhance the sensing performance of a sensor. Because their usage alone for developing a practical sensor is impeditive owing to low gas response and slow response/recovery kinetics. Here, we report a high-performance NO2 gas sensor using a hybrid of temperature-assisted sulfur vacancy within the edge-oriented vertically aligned MoS2 (Sv-MoS2) and crumpled reduced graphene oxide (rGO) particles. Interestingly, the Sv-MoS2 functionalized by optimized rGO concentration exhibited a significant enhancement of response to NO2 (approximately three times higher than that of pristine vertically aligned MoS2) with fast response (< 1 min) and complete recovery. Such a large improvement in the sensing performance could be attributed to controlled electrical/chemical sensitization level of MoS2 through controllable vacancy and interface engineering. The vacancy engineering offers abundant active sites through creating sulfur vacancy in additionally rich edge active sites of vertically oriented MoS2 for more electronic interaction with gas molecules. While interfacing of p-type rGO particles with n-type MoS2 leads to multiple out-of-plane vertical nano-heterojunctions as a sensitizing configuration for boosting the performance of the sensor. This paper opens up a new approach towards improving the sensing activity of a 2D material via a synergistic vacancy and interface engineering.read more
Citations
More filters
Journal ArticleDOI
Room-Temperature Gas Sensors Under Photoactivation: From Metal Oxides to 2D Materials
TL;DR: This review provides an overview of the utilization of photoactivated nanomaterials in gas sensing field and excellent gas sensing performance of emerging two-dimensional materials-based sensors under light illumination is discussed in details with proposed gas sensing mechanism.
Journal ArticleDOI
MoS2‐Based Nanomaterials for Room‐Temperature Gas Sensors
Journal ArticleDOI
A review on 2D transition metal di-chalcogenides and metal oxide nanostructures based NO2 gas sensors
Sunil Kumar,Sunil Kumar,Vladimir S. Pavelyev,Prabhash Mishra,Prabhash Mishra,Prabhash Mishra,Nishant Tripathi,Prachi Sharma,Fernando Calle +8 more
TL;DR: In this article, the authors discuss new developments in the fields of metal oxide nanostructures and two-dimensional transition metal dichalcogenides (2D TMDs) for NO2 sensing and a comparative analysis of different modifications and their effects on sensing properties of both the materials is presented.
Journal ArticleDOI
Transition metal dichalcogenides-based flexible gas sensors
TL;DR: This review aims at summarizing recent progress in energy-efficient flexible gas sensors by utilizing 2D transition metal dichalcogenides (TMDCs) materials by highlighting the main concepts and different approaches for optimizing the gas sensing characteristics on flexible sensing platforms.
Journal ArticleDOI
Strategy and Future Prospects to Develop Room-Temperature-Recoverable NO2 Gas Sensor Based on Two-Dimensional Molybdenum Disulfide
TL;DR: In this article, a detailed overview of the fabrication of MoS2 chemiresistance sensors in terms of devices (resistor and transistor), layer thickness, morphology control, defect tailoring, heterostructure, metal nanoparticle doping, and through light illumination is provided.
References
More filters
Journal ArticleDOI
Detection of individual gas molecules adsorbed on graphene
Fred Schedin,A. K. Geim,Sergey V. Morozov,Ernie W. Hill,Peter Blake,Mikhail I. Katsnelson,K. S. Novoselov +6 more
TL;DR: In this paper, it was shown that micrometre-size sensors made from graphene are capable of detecting individual events when a gas molecule attaches to or detaches from graphene's surface.
Journal ArticleDOI
Activating and optimizing MoS2 basal planes for hydrogen evolution through the formation of strained sulphur vacancies
Hong Li,Charlie Tsai,Ai Leen Koh,Lili Cai,Alex W. Contryman,Alex W. Contryman,Alex H. Fragapane,Alex H. Fragapane,Jiheng Zhao,Hyun Soon Han,Hari C. Manoharan,Hari C. Manoharan,Frank Abild-Pedersen,Jens K. Nørskov,Jens K. Nørskov,Xiaolin Zheng +15 more
TL;DR: This work reports the first activation and optimization of the basal plane of monolayer 2H-MoS2 for HER by introducing sulphur (S) vacancies and strain, which allows it to achieve the highest intrinsic HER activity among molybdenum-sulphide-based catalysts.
Journal ArticleDOI
Practical chemical sensors from chemically derived graphene
TL;DR: The development of useful chemical sensors from chemically converted graphene dispersions using spin coating to create single-layer films on interdigitated electrode arrays with consistent charge transfer mechanism between the analyte and graphene with a limited role of the electrical contacts is reported.
Journal ArticleDOI
Sensing behavior of atomically thin-layered MoS2 transistors
Dattatray J. Late,Yi Kai Huang,B. T. Liu,Jagaran Acharya,Jagaran Acharya,Sharmila N. Shirodkar,Jiajun Luo,Aiming Yan,Daniel Charles,Umesh V. Waghmare,Vinayak P. Dravid,C. N. R. Rao +11 more
TL;DR: The results show that, compared to the single-layer counterpart, transistors of few MoS2 layers exhibit excellent sensitivity, recovery, and ability to be manipulated by gate bias and green light, and ab initio DFT calculations show that the charge transfer is the reason for the decrease in resistance in the presence of applied field.
Journal ArticleDOI
Exploring atomic defects in molybdenum disulphide monolayers
Jinhua Hong,Zhixin Hu,Matt Probert,Kun Li,Danhui Lv,Xin-an Yang,Lin Gu,Nannan Mao,Qingliang Feng,Liming Xie,Jin Zhang,Dianzhong Wu,Zhiyong Zhang,Chuanhong Jin,Wei Ji,Wei Ji,Xixiang Zhang,Jun Yuan,Jun Yuan,Ze Zhang +19 more
TL;DR: A comprehensive joint experiment–theory investigation of point defects in monolayer molybdenum disulphide prepared by mechanical exfoliation, physical and chemical vapour deposition and influence of defects on electronic structure and charge-carrier mobility is predicted by calculation and observed by electric transport measurement.