Nanoscaffold WO3 by Kinetically Controlled Polymorphism
SCIE
SCOPUS
- Title
- Nanoscaffold WO3 by Kinetically Controlled Polymorphism
- Authors
- Park, Jaeseoung; Yoon, Hyojin; Choi, Si-Young; Son, Junwoo
- Date Issued
- 2019-01
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Several metastable polymorphs, diverse crystal structures with the same chemical formula, could be accessed through epitaxial interfaces with low energy between epitaxial film and symmetry-matched substrates. Here, we fabricated tungsten oxide (WO3) nanoscaffolds composed of hexagonal WO3 (h-WO3)/monoclinic WO3 (m-WO3) polymorphs, and modulated the proportions of these phases by tuning the W arrival rate during epitaxial growth. The WO3 nanoscaffold is vertically aligned with coherent interphase boundaries between h-WO3 and m-WO3; this structure leads to the persistence of h-WO3 despite its metastable characteristic. The coherent interphase boundaries give rise to the unexpected six-fold m-WO3 phases and a distinct lattice response with intercalated hydrogen defects. This WO3 nanoscaffold with different fractions of two polymorphs would be a good model system to systematically study intercalation chemistry and its application with WO3 polymorphs.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/95326
- DOI
- 10.1021/acs.cgd.8b01551
- ISSN
- 1528-7483
- Article Type
- Article
- Citation
- CRYSTAL GROWTH & DESIGN, vol. 19, no. 1, page. 479 - 486, 2019-01
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