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Sci Rep. 2017 Aug 18;7(1):8716. doi: 10.1038/s41598-017-09603-5.

Water-Soluble Epitaxial NaCl Thin Film for Fabrication of Flexible Devices.

Author information

1
Dept. of Materials Science and Engineering & Dept. of Energy Systems Research, Ajou University, Suwon, 16499, Korea.
2
Dept. of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, 37673, Korea.
3
School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon, 16419, Korea. jy.choi@skku.edu.
4
Dept. of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, 37673, Korea. jllee@postech.ac.kr.
5
Dept. of Materials Science and Engineering & Dept. of Energy Systems Research, Ajou University, Suwon, 16499, Korea. hakkiyu@ajou.ac.kr.

Abstract

We studied growth mechanisms of water-soluble NaCl thin films on single crystal substrates. Epitaxial growth of NaCl(100) on Si(100) and domain-matched growth of NaCl(111) on c-sapphire were obtained at thicknesses below 100 nm even at room temperature from low lattice mismatches in both cases. NaCl thin film, which demonstrates high solubility selectivity for water, was successfully applied as a water-soluble sacrificial layer for fabrication of several functional materials, such as WO3 nano-helix and Sn doped In2O3 nano-branches.

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