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Bielawski, Christopher W.
Synthetic Materials & Macromolecules
Research Interests
  • Synthetic chemistry, materials science, polymer chemistry, catalysis, carbon-based materials

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Synthesis of Honeycomb-Structured Beryllium Oxide via Graphene Liquid Cells

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Title
Synthesis of Honeycomb-Structured Beryllium Oxide via Graphene Liquid Cells
Author
Wang, LifenLiu, LeiChen, JiMohsin, AliYum, Jung HwanHudnall, Todd W.Bielawski, Christopher W.Rajh, TijanaBai, XuedongGao, Shang-PengGu, Gong
Issue Date
2020-09
Publisher
WILEY-V C H VERLAG GMBH
Citation
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.59, no.36, pp.15734 - 15740
Abstract
Using high-resolution transmission electron microscopy and electron energy-loss spectroscopy, we show that beryllium oxide crystallizes in the planar hexagonal structure in a graphene liquid cell by a wet-chemistry approach. These liquid cells can feature van-der-Waals pressures up to 1 GPa, producing a miniaturized high-pressure container for the crystallization in solution. The thickness of as-received crystals is beyond the thermodynamic ultra-thin limit above which the wurtzite phase is energetically more favorable according to the theoretical prediction. The crystallization of the planar phase is ascribed to the near-free-standing condition afforded by the graphene surface. Our calculations show that the energy barrier of the phase transition is responsible for the observed thickness beyond the previously predicted limit. These findings open a new door for exploring aqueous-solution approaches of more metal-oxide semiconductors with exotic phase structures and properties in graphene-encapsulated confined cells.
URI
https://scholarworks.unist.ac.kr/handle/201301/49120
URL
https://onlinelibrary.wiley.com/doi/full/10.1002/anie.202007244
DOI
10.1002/anie.202007244
ISSN
1433-7851
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