Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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The synthesis of atomically thin TiOx nanosheets with large size

원자층 두께를 갖는 대면적 TiOx 나노쉬트 합성

  • Lee, Sang Eun (Department of Advanced Materials Engineering, Daejeon University) ;
  • Won, Jonghan (The Advanced Nano Surface Research Group, Korea Basic Science Institute) ;
  • Park, Hee Jung (Department of Advanced Materials Engineering, Daejeon University)
  • 이상은 (대전대학교 신소재공학과) ;
  • 원종한 (한국기초과학지원연구원,) ;
  • 박희정 (대전대학교 신소재공학과)
  • Received : 2017.10.27
  • Accepted : 2017.12.11
  • Published : 2017.12.31
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Abstract

Films fabricated using atomic layer 2-dimensional nanosheets exhibit various physical properties depending on the size of the nanosheet. This is because the physical properties of the film depend on the interfacial properties between the sheets. Therefore, the synthesis of large-sized nanosheets is very important because it can reduce the dependency of the film on the interfacial properties. In this study, we succeeded in fabricating $TiO_x$ nanosheets with atomic layer thickness over micrometer size by using single-crystallized starting material and its chemical exfoliation. In addition, it was revealed that the mechanical agitation speed (the stirring speed of a magnetic bar) during the exfoliation step using the organic material is closely related to the nanosheet size and the colloidal concentration of the nanosheets.

원자층 두께의 2차원 나노쉬트(2 dimensional nanosheets)를 이용하여 제작한 필름은 나노쉬트 크기에 따라 다양한 물성을 나타낸다. 이는 필름의 물성이 쉬트와 쉬트 사이 계면물성에 의존하기 때문이다. 따라서 큰 나노쉬트의 합성은 필름의 계면물성 의존도를 줄일 수 있다는 점에서 매우 중요하다. 본 연구에서 단결정 성장된 출발물질과 화학적 박리법을 이용하여 마이크로미터 이상의 크기를 갖는 원자층 두께의 $TiO_x$ 나노쉬트를 제조하는데 성공하였다. 또한 제조 공정 중 유기물을 이용한 박리 단계 시 기계적 원심 교반속도가 나노쉬트 크기와 농도에 밀접히 연관되어 있음을 알 수 있었다.

Keywords

References

  1. A. Allain, J. Kang, K. Banerjee and A. Kis, "Electrical contacts to two-dimensional semiconductors", Nat. Mater. 14 (2015) 1195. https://doi.org/10.1038/nmat4452
  2. L. Xue, K. Kajiyoshi and Y. Yan, "Preparation of highly oriented titania nanosheet thin films by electrophoretic deposition", Thin Solid Films 518 (2009) 10. https://doi.org/10.1016/j.tsf.2009.05.058
  3. S.J. Choi, J.S. Jang, H.J. Park and I.D. Kim, "Optically sintered 2D $RuO_2$ nanosheets: Temperature-controlled $NO_2$ reaction", Adv. Funct. Mater. 27 (2017) 1606026. https://doi.org/10.1002/adfm.201606026
  4. M. Chhowalla, H.S. Shin, G. Eda, L.J. Li, K.P. Loh and H. Zhang, "The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets", Nat. Chem. 5 (2013) 263. https://doi.org/10.1038/nchem.1589
  5. Y. Gong, S. Yang, L. Zhan, L. Ma, R. Vajtai and P.M. Ajayan, "A bottom-up approach to build 3D architectures from nanosheets for superior lithium storage", Adv. Funct. Mater. 24 (2014) 125. https://doi.org/10.1002/adfm.201300844
  6. M.R. Gao, Y.F. Xu, J. Jiang and S.H. Yu, "Nanostructured metal chalcogenides: synthesis, modification and applications in energy conversion and storage devices", Chem. Soc. Rev. 42 (2013) 2986. https://doi.org/10.1039/c2cs35310e
  7. K.J. Koski and Y. Cui, "The new skinny in two-dimensional nanomaterials", ACS Nano 7 (2013) 3739. https://doi.org/10.1021/nn4022422
  8. K.S. Novoselov, A.K. Geim, S.V. Morozov, D. Jiang, M.I. Katsnelson, I.V. Grigorieva, S.V. Dubonos and A.A. Firsov, "Two-dimensional gas of massless dirac fermions in graphene", Nature 438 (2005) 197. https://doi.org/10.1038/nature04233
  9. V. Nicolosi, M. Chhowalla, M.G. Kanatzidis, M.S. Strano and J.N. Coleman, "Liquid Exfoliation of Layered Materials", Science 640 (2013) 1226419.
  10. D. Hanlon, C. Backes, E. Doherty, C.S. Cucinotta, N.C. Berner, C. Boland, K. Lee, A. Harvey, P. Lynch, Z. Gholamvand, S. Zhang, K. Wang, G. Moynihan, A. Pokle, Q.M. Ranasse, N. McEvoy, W.J. Blau, J. Wang, G. Abellan, F. Hauke, A. Hirsch, S. Sanvito, D.D. O'Regan, G.S. Duesberg, V. Nicolosi and J.N. Coleman, "Liquid exfoliation of solvent-stabilized few-layer black phosphorus for applications beyond electronics", Nat. Commun. 6 (2015) 8563. https://doi.org/10.1038/ncomms9563
  11. A.L. Gibb, N. Alem, J.H. Chen, K.J. Erickson, J. Ciston, A. Gauta, M. Linck and A. Zettl, "Atomic resolution imaging of grain boundary defects in monolayer chemical vapor deposition-grown hexagonal boron nitride", J. Am. Chem. Soc. 135 (2013) 6758. https://doi.org/10.1021/ja400637n
  12. M. Osada, T. Sasaki, K. Ono, Y. Kotani, S. Ueda and K. Kobayashi, "Orbital reconstruction and interface ferromagnetism in self-assembled nanosheet superlattices", ACS Nano 5 (2011) 6871. https://doi.org/10.1021/nn200835v
  13. L. Oakes, R. Carter, T. Hanken, A.P. Cohn, K. Share, B. Schmidt and C.L. Pint, "Interface strain in vertically stacked two dimensional heterostructured carbon-$MoS_2$ nanosheets controls electrochemical reactivity", Nat. Commun. 7 (2016) 11796. https://doi.org/10.1038/ncomms11796
  14. A. Kasry, M.A. Kuroda, G.J. Martyna, G.S. Tulevski and A.A. Bol, "Chemical doping of large-area stacked graphene films for use as transparent, conducting electrodes", ACS Nano 4 (2010) 3839. https://doi.org/10.1021/nn100508g
  15. A.H.C. Neto, F. Guinea, N.M.R. Peres, K.S. Novoselov and A.K. Geim, "The eletronic properties of graphene", Rev. Mod. Phys. 81 (2009) 109. https://doi.org/10.1103/RevModPhys.81.109
  16. J. Sato, H. Kato, M. Kimura, K. Fukuda and W. Sugimoto, "Conductivity of ruthenate nanosheets prepared via electrostatic self-assembly: Characterization of isolated single nanosheet crystallite to mono- and multilayer electrodes", Langmuir 26 (2010) 18049. https://doi.org/10.1021/la103848f
  17. Y. Masuda, Y. Hamada, W.Y. Seo, and K. Koumoto, "Exfoliation of layers in $Na_xCoO_2$", J. Nanosci. Nanotechnol 6 (2006) 1632. https://doi.org/10.1166/jnn.2006.224
  18. J.N. Coleman, M. Lotya, A. O'neil, S.D. Bergin, P.J. King, W. Khan, K. Young, A. Gaucher, S. De, R.J. Smith, I.V. Shvets, S.K. Arora, G. Stanton, H.Y. Kim, K. Lee, G.T. Kim, A. Shmeliov, R.J. Nicholls, J.M. Perkins, E.M. Grieveson, K. Theuwissen, D.W.M. Comb, P.D. Nellist and V. Nixolosi, "Two-dimensional nanosheets produced by liquid exfoliation of layered materials", Science 331 (2011) 568. https://doi.org/10.1126/science.1194975
  19. D.S. Lim, T.C. Ozawa, K. Fukuda, S. Ohshima, I. Nakai and T. Sasaki, "Soft-chemical exfoliation route to layered cobalt oxide monolayers and its application for film deposition and nanoparticle synthesis", Chem. Master. 23 (2011) 2700. https://doi.org/10.1021/cm2008208
  20. Y. Omomo, T. Sasaki, Lianzhou and M. Watanabe, "Redoxable nanosheet crystallites of $MnO_2$ derived via delamination of a layered manganese oxide", J. Am. Chem. Soc. 125 (2003) 3568. https://doi.org/10.1021/ja021364p
  21. D.S. Kim, T.C. Ozawa, K. Fukuda, S. Ohshima, I. Nakai and T. Sasaki, "Soft-chemical exfoliation of $Na_{0.9}Mo_2O_4$: Preparation and electrical conductivity characterization of a molybdenum oxide nanosheet", Chem. Mater. 23 (2011) 2700. https://doi.org/10.1021/cm2008208
  22. H. Li, J. Wu, A. Yin and H. Zhang, "Preparation and applications of mechanically exfoliated single-layer and multilayer $MoS_2$ and $WSe_2$ nanosheets", Acc. Chem. Res. 47 (2014) 1067. https://doi.org/10.1021/ar4002312
  23. J. Xu, L. Zhang, R. Shi and Y. Zhu, "Chemical exfoliation of graphitic carbon nitride for efficient heterogeneous photocatalysis", J. Mater. Chem. 1 (2013) 14766. https://doi.org/10.1039/c3ta13188b
  24. G. Fiori, F. Bonaccorso, G. Iannaccone, T. Palacios, D. Neumaier, A. Seabaugh, S.K. Banerjee and L. Colombo, "Electronics based on two-dimensional materials", Nat. Nanotechnol. 9 (2014) 768. https://doi.org/10.1038/nnano.2014.207
  25. T. Tanaka, Y. Ebina, K. Takada, K. Kurashima and T. Sasaki, "Oversized titania nanosheet crystallites derived from flux-grown layered titanate single crystals", Chem. Mater. 15 (2003) 3564. https://doi.org/10.1021/cm034307j
  26. H.J. Park, S.E. Lee and J.Y. Park, "Optical property of atomically thin titanium-oxide nanosheet for ultraviolet filtration", Thin Solid Films 636 (2017) 99. https://doi.org/10.1016/j.tsf.2017.05.039
  27. L. Denf, J. Wang, G. Ahu, L. Kang, Z. Hao, Z. Lei, Z. Yang and Z.H. Liu, "$RuO_2$/graphene hybrid material for high performance electrochemical capacitor", Journal of Power Sources 15 (2014) 407.
  28. N.I. Kovtyukhova, P.J. Ollivier, B.R. Martin, T.E. Mallouk, S.A. Chizhik, E.V. Buzaneva and A.D. Gorchinskiy, "Layer-by-layer assembly of ultrathin composite films from micron-sized graphite oxide sheets and polycations", Chem. Mater. 11 (1999) 771. https://doi.org/10.1021/cm981085u
  29. L. Li, R. Ma, Y. Ebina, K. Fukuda, K. Takada and T. Sasaki, "Layer-by-layer assembly and spontaneous flocculation of oppositely charged oxide and hydroxide nanosheets into inorganic sandwich layered materials", J. Am. Chem. Soc. 129 (2007) 8000. https://doi.org/10.1021/ja0719172