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The layer-dependent properties are still unclarified in two-dimensional (2D) vertical heterostructures. In this study, we layer-by-layer deposited semimetal β-In2Se3 on monolayer MoS2 to form vertical β-In2Se3/MoS2 heterostructures by chemical vapor deposition. The defect-mediated nucleation mechanism induces β-In2Se3 nanosheets to grow on monolayer MoS2, and the layer number of stacked β-In2Se3 can be precisely regulated from 1 layer (L) to 13 L by prolonging the growth time. The β-In2Se3/MoS2 heterostructures reveal tunable type-Ⅱ band alignment arrangement by altering the layer number of β-In2Se3, which optimizes the internal electron transfer. Meanwhile, the edge atomic structure of β-In2Se3 stacking on monolayer MoS2 shows the reconstruction derived from large lattice mismatch (~ 29%), and the presence of β-In2Se3 also further increases the electrical conductivity of β-In2Se3/MoS2 heterostructures. Attributed to abundant layer-dependent edge active sites, edge reconstruction, improved hydrophilicity, and high electrical conductivity of β-In2Se3/MoS2 heterostructures, the edge of β-In2Se3/MoS2 heterostructures exhibits excellent electrocatalytic hydrogen evolution performance. Lower onset potential and smaller Tafel slope can be observed at the edge of monolayer MoS2 coupled with 13-L β-In2Se3. Hence, the outstanding conductive layers coupled with edge reconstruction in 2D vertical heterostructures play decisive roles in the optimization of electron energy levels and improvement of layer-dependent catalytic performance.
Song, Q. J.; Tan, Q. H.; Zhang, X.; Wu, J. B.; Sheng, B. W.; Wan, Y.; Wang, X. Q.; Dai, L.; Tan, P. H. Physical origin of Davydov splitting and resonant Raman spectroscopy of Davydov components in multilayer MoTe2. Phys. Rev. B 2016, 93, 115409.
Wang, X. M.; Jones, A. M.; Seyler, K. L.; Tran, V.; Jia, Y. C.; Zhao, H.; Wang, H.; Yang, L.; Xu, X. D.; Xia, F. N. Highly anisotropic and robust excitons in monolayer black phosphorus. Nat. Nanotechnol. 2015, 10, 517–521.
Boland, J. B.; Tian, R. Y.; Harvey, A.; Vega-Mayoral, V.; Griffin, A.; Horvath, D. V.; Gabbett, C.; Breshears, M.; Pepper, J.; Li, Y. G. et al. Liquid phase exfoliation of GeS nanosheets in ambient conditions for lithium ion battery applications. 2D Mater. 2020, 7, 035015.
Meng, L. J.; Zhou, Z.; Xu, M. Q.; Yang, S. Q.; Si, K. P.; Liu, L. X.; Wang, X. G.; Jiang, H. N.; Li, B. X.; Qin, P. X. et al. Anomalous thickness dependence of Curie temperature in air-stable two-dimensional ferromagnetic 1T-CrTe2 grown by chemical vapor deposition. Nat. Commun. 2021, 12, 809.
Zhao, B.; Dang, W. Q.; Liu, Y.; Li, B.; Li, J.; Luo, J.; Zhang, Z. W.; Wu, R. X.; Ma, H. F.; Sun, G. Z. et al. Synthetic control of two-dimensional NiTe2 single crystals with highly uniform thickness distributions. J. Am. Chem. Soc. 2018, 140, 14217–14223.
Jin, W. C.; Yeh, P. C.; Zaki, N.; Zhang, D. T.; Sadowski, J. T.; Al-Mahboob, A.; van der Zande, A. M.; Chenet, D. A.; Dadap, J. I.; Herman, I. P. et al. Direct measurement of the thickness-dependent electronic band structure of MoS2 using angle-resolved photoemission spectroscopy. Phys. Rev. Lett. 2013, 111, 106801.
Zeng, Q. S.; Wang, H.; Fu, W.; Gong, Y. J.; Zhou, W.; Ajayan, P. M.; Lou, J.; Liu, Z. Band engineering for novel two-dimensional atomic layers. Small 2015, 11, 1868–1884.
Cai, Y. Q.; Zhang, G.; Zhang, Y. W. Layer-dependent band alignment and work function of few-layer phosphorene. Sci. Rep. 2014, 4, 6677.
Hsu, C.; Frisenda, R.; Schmidt, R.; Arora, A.; de Vasconcellos, S. M.; Bratschitsch, R.; van der Zant, H. S. J.; Castellanos-Gomez, A. Thickness-dependent refractive index of 1 L, 2 L, and 3 L MoS2, MoSe2, WS2, and WSe2. Adv. Opt. Mater. 2019, 7, 1900239.
Lee, C.; Yan, H. G.; Brus, L. E.; Heinz, T. F.; Hone, J.; Ryu, S. Anomalous lattice vibrations of single- and few-layer MoS2. ACS Nano 2010, 4, 2695–2700.
Li, H.; Zhang, Q.; Yap, C. C. R.; Tay, B. K.; Edwin, T. H. T.; Olivier, A.; Baillargeat, D. From bulk to monolayer MoS2: Evolution of Raman scattering. Adv. Funct. Mater. 2012, 22, 1385–1390.
Villaos, R. A. B.; Crisostomo, C. P.; Huang, Z. Q.; Huang, S. M.; Padama, A. A. B.; Albao, M. A.; Lin, H.; Chuang, F. C. Thickness dependent electronic properties of Pt dichalcogenides. npj 2D Mater. Appl. 2019, 3, 2.
Sun, L. F.; Yan, X. X.; Zheng, J. Y.; Yu, H. D.; Lu, Z. X.; Gao, S. P.; Liu, L. N.; Pan, X. Q.; Wang, D.; Wang, Z. G. et al. Layer-dependent chemically induced phase transition of two-dimensional MoS2. Nano Lett. 2018, 18, 3435–3440.
Ribeiro-Soares, J.; Janisch, C.; Liu, Z.; Elías, A. L.; Dresselhaus, M. S.; Terrones, M.; Cançado, L. G.; Jorio, A. Second harmonic generation in WSe2. 2D Mater. 2015, 2, 045015.
Zhang, L.; Yang, T.; Sahdan, M. F.; Arramel; Xu, W. S.; Xing, K. J.; Feng, Y. P.; Zhang, W. J.; Wang, Z.; Wee, A. T. S. Precise layer-dependent electronic structure of MBE-grown PtSe2. Adv. Electron. Mater. 2021, 7, 2100559.
Cui, F. F.; Zhao, X. X.; Xu, J. J.; Tang, B.; Shang, Q. Y.; Shi, J. P.; Huan, Y. H.; Liao, J. H.; Chen, Q.; Hou, Y. L. et al. Controlled growth and thickness-dependent conduction-type transition of 2D ferrimagnetic Cr2S3 semiconductors. Adv. Mater. 2020, 32, 1905896.
Ho, C. H. Thickness-dependent carrier transport and optically enhanced transconductance gain in III–VI multilayer InSe. 2D Mater. 2016, 3, 025019.
Li, B.; Wan, Z.; Wang, C.; Chen, P.; Huang, B.; Cheng, X.; Qian, Q.; Li, J.; Zhang, Z. W.; Sun, G. Z. et al. Van der Waals epitaxial growth of air-stable CrSe2 nanosheets with thickness-tunable magnetic order. Nat. Mater. 2021, 20, 818–825.
Guo, J. J.; Xia, Q. L.; Wang, X. G.; Nie, Y. Z.; Xiong, R.; Guo, G. H. Temperature and thickness dependent magnetization reversal in 2D layered ferromagnetic material Fe3GeTe2. J. Magn. Magn. Mater. 2021, 527, 167719.
Liu, Y.; Wu, L. J.; Tong, X.; Li, J.; Tao, J.; Zhu, Y. M.; Petrovic, C. Thickness-dependent magnetic order in CrI3 single crystals. Sci. Rep. 2019, 9, 13599.
Hu, D. K.; Zhao, T. Q.; Ping, X. F.; Zheng, H. S.; Xing, L.; Liu, X. Z.; Zheng, J. Y.; Sun, L. F.; Gu, L.; Tao, C. G. et al. Unveiling the layer-dependent catalytic activity of PtSe2 atomic crystals for the hydrogen evolution reaction. Angew. Chem., Int. Ed. 2019, 58, 6977–6981.
Shao, G. L.; Xu, Y. Y.; Liu, S. Controllable preparation of 2D metal-semiconductor layered metal dichalcogenides heterostructures. Sci. China Chem. 2019, 62, 295–298.
Shao, G. L.; Xue, X. X.; Zhou, X. L.; Xu, J.; Jin, Y. Y.; Qi, S. Y.; Liu, N.; Duan, H. G.; Wang, S. S.; Li, S. S. et al. Shape-engineered synthesis of atomically thin 1T-SnS2 catalyzed by potassium halides. ACS Nano 2019, 13, 8265–8274.
Shao, G. L.; Xue, X. X.; Liu, X.; Zhang, D. L.; Jin, Y. Y.; Wu, Y. W.; You, B. Y.; Lin, Y. C.; Li, S. S.; Suenaga, K. et al. Twist angle-dependent optical responses in controllably grown WS2 vertical homojunctions. Chem. Mater. 2020, 32, 9721–9729.
Shao, G. L.; Lu, Y. Z.; Hong, J. H.; Xue, X. X.; Huang, J. Q.; Xu, Z. Y.; Lu, X. C.; Jin, Y. Y.; Liu, X.; Li, H. M. et al. Seamlessly splicing metallic SnxMo1−xS2 at MoS2 edge for enhanced photoelectrocatalytic performance in microreactor. Adv. Sci. 2020, 7, 2002172.
Liu, H.; Qi, G. P.; Tang, C. S.; Chen, M. L.; Chen, Y.; Shu, Z. W.; Xiang, H. Y.; Jin, Y. Y.; Wang, S. S.; Li, H. M. et al. Growth of large-area homogeneous monolayer transition-metal disulfides via a molten liquid intermediate process. ACS Appl. Mater. Interfaces 2020, 12, 13174–13181.
Zhou, Y.; Wu, D.; Zhu, Y. H.; Cho, Y. J.; He, Q.; Yang, X.; Herrera, K.; Chu, Z. D.; Han, Y.; Downer, M. C. et al. Out-of-plane piezoelectricity and ferroelectricity in layered α-In2Se3 nanoflakes. Nano Lett. 2017, 17, 5508–5513.
Liu, L. X.; Dong, J. Y.; Huang, J. Q.; Nie, A. M.; Zhai, K.; Xiang, J. Y.; Wang, B. C.; Wen, F. S.; Mu, C. P.; Zhao, Z. S. et al. Atomically resolving polymorphs and crystal structures of In2Se3. Chem. Mater. 2019, 31, 10143–10149.
Mohapatra, P. K.; Ranganathan, K.; Dezanashvili, L.; Houben, L.; Ismach, A. Epitaxial growth of In2Se3 on monolayer transition metal dichalcogenide single crystals for high performance photodetectors. Appl. Mater. Today 2020, 20, 100734.
Almeida, G.; Dogan, S.; Bertoni, G.; Giannini, C.; Gaspari, R.; Perissinotto, S.; Krahne, R.; Ghosh, S.; Manna, L. Colloidal monolayer β-In2Se3 nanosheets with high photoresponsivity. J. Am. Chem. Soc. 2017, 139, 3005–3011.
Zou, Z. X.; Li, D.; Liang, J. W.; Zhang, X. H.; Liu, H. W.; Zhu, C. G.; Yang, X.; Li, L. H.; Zheng, B. Y.; Sun, X. X. et al. Epitaxial synthesis of ultrathin β-In2Se3/MoS2 heterostructures with high visible/near-infrared photoresponse. Nanoscale 2020, 12, 6480–6488.
Feng, W.; Zheng, W.; Gao, F.; Chen, X. S.; Liu, G. B.; Hasan, T.; Cao, W. W.; Hu, P. A. Sensitive electronic-skin strain sensor array based on the patterned two-dimensional α-In2Se3. Chem. Mater. 2016, 28, 4278–4283.
Wang, J. W.; Cai, X. B.; Shi, R.; Wu, Z. F.; Wang, W. J.; Long, G.; Tang, Y. J.; Cai, N. D.; Ouyang, W. K.; Geng, P. et al. Twin defect derived growth of atomically thin MoS2 dendrites. ACS Nano 2018, 12, 635–643.
Li, S. Y.; Chen, X. Q.; Liu, F. M.; Chen, Y. F.; Liu, B. Y.; Deng, W. J.; An, B. X.; Chu, F. H.; Zhang, G. Q.; Li, S. L. et al. Enhanced performance of a CVD MoS2 photodetector by chemical in situ n-type doping. ACS Appl. Mater. Interfaces 2019, 11, 11636–11644.
Li, J.; Yang, X. D.; Liu, Y.; Huang, B. L.; Wu, R. X.; Zhang, Z. W.; Zhao, B.; Ma, H. F.; Dang, W. Q.; Wei, Z. et al. General synthesis of two-dimensional van der Waals heterostructure arrays. Nature 2020, 579, 368–374.
Lin, M.; Wu, D.; Zhou, Y.; Huang, W.; Jiang, W.; Zheng, W. S.; Zhao, S. L.; Jin, C. H.; Guo, Y. F.; Peng, H. L. et al. Controlled growth of atomically thin In2Se3 flakes by van der Waals epitaxy. J. Am. Chem. Soc. 2013, 135, 13274–13277.
Cui, C. J.; Xue, F.; Hu, W. J.; Li, L. J. Two-dimensional materials with piezoelectric and ferroelectric functionalities. npj 2D Mater. Appl. 2018, 2, 18.
Dagan, R.; Vaknin, Y.; Henning, A.; Shang, J. Y.; Lauhon, L. J.; Rosenwaks, Y. Two-dimensional charge carrier distribution in MoS2 monolayer and multilayers. Appl. Phys. Lett. 2019, 114, 101602.
Feng, W.; Gao, F.; Hu, Y. X.; Dai, M. J.; Liu, H.; Wang, L. F.; Hu, P. A. Phase-engineering-driven enhanced electronic and optoelectronic performance of multilayer In2Se3 nanosheets. ACS Appl. Mater. Interfaces 2018, 10, 27584–27588.
Yang, H.; He, Q. Y.; Liu, Y. W.; Li, H. Q.; Zhang, H.; Zhai, T. Y. On-chip electrocatalytic microdevice: An emerging platform for expanding the insight into electrochemical processes. Chem. Soc. Rev. 2020, 49, 2916–2936.
Shao, G. L.; Xue, X. X.; Wu, B. B.; Lin, Y. C.; Ouzounian, M.; Hu, T. S.; Xu, Y. Q.; Liu, X.; Li, S. S.; Suenaga, K. et al. Template-assisted synthesis of metallic 1T'-Sn0. 3W0. 7S2 nanosheets for hydrogen evolution reaction. Adv. Funct. Mater. 2020, 30, 1906069.
Zhang, X.; Chen, A.; Chen, L. T.; Zhou, Z. 2D materials bridging experiments and computations for electro/photocatalysis. Adv. Energy Mater. 2022, 12, 2003841.
Li, H.; Tsai, C.; Koh, A. L.; Cai, L. L.; Contryman, A. W.; Fragapane, A. H.; Zhao, J. H.; Han, H. S.; Manoharan, H. C.; Abild-Pedersen, F. et al. Activating and optimizing MoS2 basal planes for hydrogen evolution through the formation of strained sulphur vacancies. Nat. Mater. 2016, 15, 48–53.
Shao, G. L.; Xiang, H. Y.; Huang, M. J.; Zong, Y.; Luo, J.; Feng, Y. X.; Xue, X. X.; Xu, J.; Liu, S.; Zhou, Z. S vacancies in 2D SnS2 accelerating hydrogen evolution reaction. Sci. China Mater. 2022, 65, 1833–1841.
Xu, J.; Shao, G. L.; Tang, X.; Lv, F.; Xiang, H. Y.; Jing, C. F.; Liu, S.; Dai, S.; Li, Y. G.; Luo, J. et al. Frenkel-defected monolayer MoS2 catalysts for efficient hydrogen evolution. Nat. Commun. 2022, 13, 2193.
Uhlig, M. R.; Martin-Jimenez, D.; Garcia, R. Atomic-scale mapping of hydrophobic layers on graphene and few-layer MoS2 and WSe2 in water. Nat. Commun. 2019, 10, 2606.