Research output: Contribution to journal › Article › peer-review
Large and Uniform Single Crystals of MoS2Monolayers for ppb-Level NO2Sensing. / Patel, Chandrabhan; Singh, Ruchi; Dubey, Mayank et al.
In: ACS Applied Nano Materials, Vol. 5, No. 7, 22.07.2022, p. 9415–9426.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Large and Uniform Single Crystals of MoS2Monolayers for ppb-Level NO2Sensing
AU - Patel, Chandrabhan
AU - Singh, Ruchi
AU - Dubey, Mayank
AU - Pandey, Sushil Kumar
AU - Upadhyay, Shrish Nath
AU - Kumar, Vikash
AU - Sriram, Sharath
AU - Than Htay, Myo
AU - Pakhira, Srimanta
AU - Atuchin, Victor V.
AU - Mukherjee, Shaibal
N1 - Funding Information: Authors are thankful to Dr. Vinod Kumar, MEMS, IIT Indore for providing the optical microscopy facility. The work is partly supported by TIH-IOT CHANAKYA Group (PhD, PG, and UG) Fellowship Programme 2021–2022 (TIH-IOT/12/2022/CHANAKYA/Group/Sanction Letter/004), JSPS Invitational Fellowship (ID: S21057), and MHRD STARS (project no. STARS/APR2019/NS/116/FS dated December 31, 2019). Special thanks to A. Abadi of Shinshu University for AFM imaging. This work was partly supported by the Ministry of Science and Higher Education of Russia (project 075-15-2020-797 (13.1902.21.0024)). S.P. acknowledges the Science and Engineering Research Board, Department of Science and Technology (SERB-DST) for providing his highly prestigious Ramanujan Faculty Fellowship under scheme no. SB/S2/RJN-067/2017, and for his Early Career Research Award (ECRA) under grant no. ECR/2018/000255. V.K. thanks UGC for availing his doctoral fellowship UGC ref. no.: 1403/(CSIR-UGC NET JUNE 2019). Publisher Copyright: © 2022 American Chemical Society.
PY - 2022/7/22
Y1 - 2022/7/22
N2 - Recently, unprecedented interest has been immersed toward the synthesis of two-dimensional (2D) transition metal dichalcogenides via the chemical vapor deposition (CVD) system. Synthesis of a uniform and large-sized monolayer MoS2 atomic thin film via CVD is still a major bottleneck owing to strong dependence on diverse associated growth parameters. In this work, we have proposed the most viable recipe which is suitable for controlling the nucleation density of Mo and producing a 90 μm-long MoS2 monolayer crystal and (695 × 394.8) μm2 large MoS2 monolayered film on SiO2/Si and c-plane sapphire, respectively. Moreover, MoS2 monolayer sensing performance has been thoroughly investigated for NO2 exposure at room temperature with a varying response of 4-57.5 for the 100-100 ppm level. Furthermore, the MoS2 monolayer sensor exhibits an ultrasensitive NO2 detection with limit of detection and limit of qualification values of 1.4 and 4.6 ppb, respectively. In addition, the first-principles-based density functional theory has been employed to analyze the adsorption of NO2 on the surfaces of the 2D MoS2 monolayer. It is observed that the electronic band gap of the MoS2 monolayer after NO2 adsorption is reduced by 0.7 eV due to molecular orbital hybridization.
AB - Recently, unprecedented interest has been immersed toward the synthesis of two-dimensional (2D) transition metal dichalcogenides via the chemical vapor deposition (CVD) system. Synthesis of a uniform and large-sized monolayer MoS2 atomic thin film via CVD is still a major bottleneck owing to strong dependence on diverse associated growth parameters. In this work, we have proposed the most viable recipe which is suitable for controlling the nucleation density of Mo and producing a 90 μm-long MoS2 monolayer crystal and (695 × 394.8) μm2 large MoS2 monolayered film on SiO2/Si and c-plane sapphire, respectively. Moreover, MoS2 monolayer sensing performance has been thoroughly investigated for NO2 exposure at room temperature with a varying response of 4-57.5 for the 100-100 ppm level. Furthermore, the MoS2 monolayer sensor exhibits an ultrasensitive NO2 detection with limit of detection and limit of qualification values of 1.4 and 4.6 ppb, respectively. In addition, the first-principles-based density functional theory has been employed to analyze the adsorption of NO2 on the surfaces of the 2D MoS2 monolayer. It is observed that the electronic band gap of the MoS2 monolayer after NO2 adsorption is reduced by 0.7 eV due to molecular orbital hybridization.
KW - chemical vapor deposition
KW - density functional theory
KW - MoSmonolayer
KW - NOand HS sensor
UR - http://www.scopus.com/inward/record.url?scp=85134811496&partnerID=8YFLogxK
U2 - 10.1021/acsanm.2c01701
DO - 10.1021/acsanm.2c01701
M3 - Article
AN - SCOPUS:85134811496
VL - 5
SP - 9415
EP - 9426
JO - ACS Applied Nano Materials
JF - ACS Applied Nano Materials
SN - 2574-0970
IS - 7
ER -
ID: 36710524