Abstract
Various types of MoS2 structures are successfully obtained by using economical and facile sequential synthesis and exfoliation methods. Spherically-shaped lumps of multilayer (ML) MoS2 are prepared by using a conventional hydrothermal method and were subsequently 1st-exfoliated in hydrazine while being kept in autoclave to be unrolled and separated into five-to-six-layer MoS2 pieces of several-hundred nm in size. The MoS2 MLs are 2nd-exfoliated in sodium naphthalenide under an Ar ambient to finally produce bilayer MoS2 crystals of ~100 nm. The sequential exfoliation processes downsize MoS2 laterally and reduce its number of layers. The three types of MoS2 allotropes exhibit particular optical properties corresponding to their structural differences. These results suggest that two-dimensional MoS2 crystals can be prepared by employing only chemical techniques without starting from high-pressure-synthesized bulk MoS2 crystals.
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References
K. S. Kim et al., Nature 457, 706 (2009).
X. Li et al., Science 324, 1312 (2009).
R. R. Nair, P. Blake, A. N. Grigorenko, K. S. Novoselov, T. J. Booth, T. Stauber, N. M. R. Peres and A. K. Geim, Science 320, 1308 (2008).
A. H. Castro Neto, F. Guinea, N. M. R. Peres, K. S. Novoselov, and A. K. Geim, Rev. of Mod. Phys. 81, 109 (2009).
J. H. Lee et al., Science 344, 286 (2014).
Z. Yin et al., ACS Nano 6, 74 (2012).
B. Radisavljevic, A. Radenovic, J. Brivio, V. Giacometti and A. Kis, Nat. Nanotechnol. 6, 147 (2011).
B. B. L. Evans and P. A. Young, Proc. Roy. Soc. A 284, 402 (1965).
R. Fivaz and E. Mooser, Phys. Rev. A 163, 743 (1967).
A. Splendiani, L. Sun, Y. Zhang, T. Li, J. Kim, C. Y. Chim, G. Galli and F. Wang, Nano Lett. 10, 1271 (2010).
K. F. Mak, C. Lee, J. Hone, J. Shan and T. F. Heinz, Phys. Rev. Lett. 105, 136805 (2010).
H. Liu and P. D. Ye, IEEE Elec. Dev. Lett. 33, 546 (2012).
H. Wang et al., Nano Lett. 12, 4674 (2012).
M. Thripuranthaka, R. V. Kashid, C. S. Rout and D. J. Late, Appl. Phys. Lett. 104, 081911 (2014).
N. Li, Y. Chai, Y. Li, Z. Tang, B. Dong, Y. Liu and C. Liu, Mater. Lett. 66, 236 (2012).
S. Wang, G. Li, G. Du, X. Jiang, C. Feng, Z. Guo and S. J. Kim, Chinese J. Chem. Engin. 18, 910 (2010).
Y. Zhan, Z. Liu, S. Najmaei, P. M. Ajayan and J. Lou, Small 8, 966 (2012).
W. Wu, D. De, S. C. Chang, Y. Wang, H. Peng, J. Bao and S. S. Pei, Appl. Phys. Lett. 102, 142106 (2013).
H. Schmidt et al., Nano Lett. 14, 1909 (2014).
H. Li, Q. Zhang, C. C. R. Yap, B. K. Tay, T. H. T. Edwin, A. Olivier and D. Baillargeat, Adv. Funct. Mater. 22, 1385 (2012).
H. Li et al., Small 8, 63 (2012).
J. Zheng, H. Zhang, S. Dong, Y. Liu, C. T. Nai, H. S. Shin, H. Y. Jeong, B. Liu and K. P. Loh, Nat. Commun. 5, 2995 (2013).
M. A. Lukowski, A. S. Daniel, F. Meng, A. Forticaux, L. Li and S. Jin, J. Am. Chem. Soc. 135, 10274 (2013).
G. Tang, J. Sun, C. Wei, K. Wu, X. Ji, S. Liu, H. Tang, and C. Li, Mater. Lett. 86, 9 (2012).
P. Joensen, E. D. Crozier, N. Alberding and R. F. Frindt, J. Phys. C: Solid State Phys. 20, 4043 (1987).
T. J. Wieting and J. L. Verble, Phys. Rev. B 3, 12 (1971).
W. Zhao, R. M. Ribeiro, M. Toh, A. Carvalho, C. Kloc and A. H. Castro Neto, G. Eda, Nano Lett. 13, 5627 (2010).
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Kim, J.H., Kim, J., Oh, S.D. et al. Sequential structural and optical evolution of MoS2 by chemical synthesis and exfoliation. Journal of the Korean Physical Society 66, 1852–1855 (2015). https://doi.org/10.3938/jkps.66.1852
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DOI: https://doi.org/10.3938/jkps.66.1852