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나노의학 연구단
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Colloidal Single-Layer Quantum Dots with Lateral Confinement Effects on 2D Exciton

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Title
Colloidal Single-Layer Quantum Dots with Lateral Confinement Effects on 2D Exciton
Author(s)
Jin, H; Minji Ahn; Sohee Jeong; Jae Hyo Han; Dongwon Yoo; Son, DH; Jinwoo Cheon
Publication Date
2016-10
Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.138, no.40, pp.13253 - 13259
Publisher
AMER CHEMICAL SOC
Abstract
Controlled lateral quantum confinement in single-layer transition-metal chalcogenides (TMCs) can potentially combine the unique properties of two-dimensional (2D) exciton with the size-tunability of exciton energy, creating the single-layer quantum dots (SQDs) of 2D TMC materials. However, exploring such opportunities has been challenging due to the limited ability to produce well-defined SQDs with sufficiently high quality and size control, in conjunction with the commonly observed inconsistency in the optical properties. Here, we report an effective method to synthesize high-quality and size-controlled SQDs of WSe2 via multilayer quantum dots (MQDs) precursors, which enables grasping a clear picture of the role of lateral confinement on the optical properties of the 2D exciton. From the single-particle optical spectra and polarization anisotropy of WSe2 SQDs of varying sizes in addition to their ensemble data, we reveal how the properties of 2D exciton in single-layer TMCs evolve with increasing lateral quantum confinement. © 2016 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/3170
ISSN
0002-7863
Appears in Collections:
Center for Nanomedicine (나노의학 연구단) > Journal Papers
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