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나노입자 연구단
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Route to the Smallest Doped Semiconductor: Mn2+-Doped (CdSe)13 Clusters

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Title
Route to the Smallest Doped Semiconductor: Mn2+-Doped (CdSe)13 Clusters
Author(s)
Jiwoong Yang; Fainblat, R; Soon Gu Kwon; Muckel, F; Jung Ho Yu; Terlinden, H; Byung Hyo Kim; Iavarone, D; Moon Kee Choi; Kim, IY; Inchul Park; Hong, HK; Jihwa Lee; Son, JS; Zonghoon Lee; Kisuk Kang; Hwang, SJ; Bacher, G; Taeghwan Hyeon
Publication Date
2015-10
Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.137, no.40, pp.12776 - 12779
Publisher
AMER CHEMICAL SOC
Abstract
Doping semiconductor nanocrystals with magnetic transition-metal ions has attracted fundamental interest to obtain a nanoscale dilute magnetic semiconductor, which has unique spin exchange interaction between magnetic spin and exciton. So far, the study on the doped semiconductor NCs has usually been conducted with NCs with larger than 2 nm because of synthetic challenges. Herein, we report the synthesis and characterization of Mn2+-doped (CdSe)13 clusters, the smallest doped semiconductors. In this study, single-sized doped clusters are produced in large scale. Despite their small size, these clusters have semiconductor band structure instead of that of molecules. Surprisingly, the clusters show multiple excitonic transitions with different magneto-optical activities, which can be attributed to the fine structure splitting. Magneto-optically active states exhibit giant Zeeman splittings up to elevated temperatures (128 K) with large g-factors of 81(±8) at 4 K. Our results present a new synthetic method for doped clusters and facilitate the understanding of doped semiconductor at the boundary of molecules and quantum nanostructure. © 2015 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/2294
ISSN
0002-7863
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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