Large-area two-dimensional bismuth selenide crystals synthesized by solution-based control of the nucleation environment
SCIE
SCOPUS
- Title
- Large-area two-dimensional bismuth selenide crystals synthesized by solution-based control of the nucleation environment
- Authors
- Pradhan, M; Song, I; Lee, J; Lee, M; Park, C; Choi, HC
- Date Issued
- 2016-11
- Publisher
- Royal Society of Chemistry
- Abstract
- Two-dimensional (2D) Bi2Se3 is one of the most studied nanomaterials in recent years because of its fascinating electronic properties. However, previous synthesis methods, especially solution-based methods, were not capable of growing laterally large 2D Bi2Se3 crystals (mostly up to a few micrometers), and thus its real application and in-depth study was practically impossible. In this communication, we report a simple, reliable two-step method to synthesize large (20-50 mm in the lateral diameter and 10-15 nm in the thickness) disks of Bi2Se3 in the presence of ethylenediamine-tetraacetic acid (EDTA) and chloride ion, where EDTA acts as a complexing agent with bismuth(III). Depending on the growth conditions, we obtained 2D Bi2Se3 crystals having either a flat or spiral surface. We have thoroughly characterized the morphology, crystal structures, and electrical properties of these new disks, and we also discussed a possible growth mechanism based on the control over the surface chemistry and the nucleation stage.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/37815
- DOI
- 10.1039/C6RA23982J
- ISSN
- 2046-2069
- Article Type
- Article
- Citation
- RSC Advances, vol. 6, no. 108, page. 106960 - 106963, 2016-11
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