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Mukul Pradhan
원자제어 저차원 전자계 연구단
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Large-area two-dimensional bismuth selenide crystals synthesized by solution-based control of the nucleation environment

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Title
Large-area two-dimensional bismuth selenide crystals synthesized by solution-based control of the nucleation environment
Author(s)
Mukul Pradhan; Intek Song; Jinho Lee; Minkyung Lee; Chibeom Park; Hee Cheul Choi
Publication Date
2016-11
Journal
RSC ADVANCES, v.6, no.108, pp.106960 - 106963
Publisher
ROYAL SOC 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 μm 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. © The Royal Society of Chemistry
URI
https://pr.ibs.re.kr/handle/8788114/3319
ISSN
2046-2069
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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