title: Route to the Smallest Doped Semiconductor: Mn(2+)-Doped (CdSe)13 Clusters.
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 Mn(2+)-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.
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Republic of Korea.
authors.forename: Jiwoong
authors.initials: J
authors.lastname: Yang
authors.affiliation: Werkstoffe der Elektrotechnik und CENIDE, Universität Duisburg-Essen , 47057 Duisburg, Germany.
authors.forename: Rachel
authors.initials: R
authors.lastname: Fainblat
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Republic of Korea.
authors.forename: Soon Gu
authors.initials: SG
authors.lastname: Kwon
authors.affiliation: Werkstoffe der Elektrotechnik und CENIDE, Universität Duisburg-Essen , 47057 Duisburg, Germany.
authors.forename: Franziska
authors.initials: F
authors.lastname: Münzer
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Republic of Korea.
authors.forename: Jung Ho
authors.initials: JH
authors.lastname: Yu
authors.affiliation: Werkstoffe der Elektrotechnik und CENIDE, Universität Duisburg-Essen , 47057 Duisburg, Germany.
authors.forename: Hendrik
authors.initials: H
authors.lastname: Terlinden
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Republic of Korea.
authors.forename: Byung Hyo
authors.initials: BH
authors.lastname: Kim
authors.affiliation: Werkstoffe der Elektrotechnik und CENIDE, Universität Duisburg-Essen , 47057 Duisburg, Germany.
authors.forename: Dino
authors.initials: D
authors.lastname: Iavarone
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Republic of Korea.
authors.forename: Moon Kee
authors.initials: MK
authors.lastname: Choi
authors.affiliation: Materials Research Institute for Clean Energy, Department of Chemistry and Nano Sciences, Ewha Womans University , Seoul 120-750, Republic of Korea.
authors.forename: In Young
authors.initials: IY
authors.lastname: Kim
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Republic of Korea.
authors.forename: Inchul
authors.initials: I
authors.lastname: Park
authors.affiliation: School of Materials Science and Engineering, Ulsan National Institute of Science and Technology , Ulsan 689-798, Republic of Korea.
authors.forename: Hyo-Ki
authors.initials: HK
authors.lastname: Hong
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Republic of Korea.
authors.forename: Jihwa
authors.initials: J
authors.lastname: Lee
authors.affiliation: School of Materials Science and Engineering, Ulsan National Institute of Science and Technology , Ulsan 689-798, Republic of Korea.
authors.forename: Jae Sung
authors.initials: JS
authors.lastname: Son
authors.affiliation: School of Materials Science and Engineering, Ulsan National Institute of Science and Technology , Ulsan 689-798, Republic of Korea.
authors.forename: Zonghoon
authors.initials: Z
authors.lastname: Lee
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Republic of Korea.
authors.forename: Kisuk
authors.initials: K
authors.lastname: Kang
authors.affiliation: Materials Research Institute for Clean Energy, Department of Chemistry and Nano Sciences, Ewha Womans University , Seoul 120-750, Republic of Korea.
authors.forename: Seong-Ju
authors.initials: SJ
authors.lastname: Hwang
authors.affiliation: Werkstoffe der Elektrotechnik und CENIDE, Universität Duisburg-Essen , 47057 Duisburg, Germany.
authors.forename: Gerd
authors.initials: G
authors.lastname: Bacher
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Republic of Korea.
authors.forename: Taeghwan
authors.initials: T
authors.lastname: Hyeon