Spin Coating Promotes the Epitaxial Growth of AgCN Microwires on 2D Materials
- Title
- Spin Coating Promotes the Epitaxial Growth of AgCN Microwires on 2D Materials
- Author
- 홍석준
- Keywords
- spin coating; epitaxial growth; van der Waals epitaxy; silver cyanide; 2D materials; van der Waals heterostructures
- Issue Date
- 2022-12-07
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS NANO, v. 16, no 12, page. 20521-20532
- Abstract
- Epitaxial growth of inorganic crystals on 2D materials is expected to greatly advance nanodevices and nanocomposites. However, because pristine surfaces of 2D materials are chemically inert, it is difficult to grow inorganic crystals epitaxially on 2D materials. Previously, successful results were achieved only by vapor-phase deposition at high temperature, and solution-based deposition including spin coating made the epitaxial growth unaligned, sparse, or nonuniform on 2D materials. Here, we show that solvent-controlled spin coating can uniformly deposit a dense layer of epitaxial AgCN microwires onto various 2D materials. Adding ethanol to an aqueous AgCN solution facilitates uniform formation of the thin supersaturated solution layer during spin coating, which promotes heterogeneous crystal nucleation on 2D material surfaces over homogeneous nucleation in the bulk solution. Microscopic analysis confirms highly aligned, uniform, and dense growth of epitaxial AgCN microwires on graphene, MoS2, hBN, WS2, and WSe2. The epitaxial microwires, which are optically observable and chemically removable, enable crystallographic mapping of grains in millimeter-sized polycrystalline graphene as well as precise control of twist angles (˂similar to 1 degrees) in van der Waals heterostructures. In addition to these practical applications, our study demonstrates the potential of 2D materials as epitaxial templates even in spin coating of inorganic crystals.
- URI
- https://pubs.acs.org/doi/10.1021/acsnano.2c06963https://repository.hanyang.ac.kr/handle/20.500.11754/191034
- ISSN
- 1936-0851; 1936-086X
- DOI
- https://doi.org/10.1021/acsnano.2c06963
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
- Files in This Item:
- 2022.12_홍석준_Spin Coating Promotes the Epitaxial Growthof AgCN Microwires on 2D Materials.pdfDownload
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