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Song, Hyun-Kon
eclat: ElectroChemistry Lab of Advanced Technology
Research Interests
  • Electrochemical analysis, electroactive materials, electrochemistry-based energy devices

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Nanoporous Films and Nanostructure Arrays Created by Selective Dissolution of Water-Soluble Materials

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Title
Nanoporous Films and Nanostructure Arrays Created by Selective Dissolution of Water-Soluble Materials
Author
Kim, Yoon SeoSong, JaejungHwang, ChihyunWang, XuejingWang, HaiyanMacManus-Driscoll, Judith L.Song, Hyun-KonCho, Seungho
Issue Date
2018-11
Publisher
WILEY
Citation
ADVANCED SCIENCE, v.5, no.11, pp.1800851
Abstract
Highly porous thin films and nanostructure arrays are created by a simple process of selective dissolution of a water-soluble material, Sr3Al2O6. Heteroepitaxial nanocomposite films with self-separated phases of a target material and Sr3Al2O6 are first prepared by physical vapor deposition. NiO, ZnO, and Ni1-xMgxO are used as the target materials. Only the Sr3Al2O6 phase in each nanocomposite film is selectively dissolved by dipping the film in water for 30 s at room temperature. This gentle and fast method minimizes damage to the remaining target materials and side reactions that can generate impurity phases. The morphologies and dimensions of the pores and nanostructures are controlled by the relative wettability of the separated phases on the growth substrates. The supercapacitor properties of the porous NiO films are enhanced compared to plain NiO films. The method can also be used to prepare porous films or nanostructure arrays of other oxides, metals, chalcogenides, and nitrides, as well as films or nanostructures with single-crystalline, polycrystalline, or amorphous nature.
URI
https://scholarworks.unist.ac.kr/handle/201301/25441
URL
https://onlinelibrary.wiley.com/doi/full/10.1002/advs.201800851
DOI
10.1002/advs.201800851
ISSN
2198-3844
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