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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/27773

    Title: Size-Controlled Ex-nihilo Ferromagnetism in Capped CdSe Quantum Dots
    Authors: Seehra, Mohindar S.;Dutta, Prasanta;Neeleshwar, Sonnathi;Chen, Yang-yuan;Chen, Cheng-lung;Chou, Shang-wei;Chen, Chia-chun;Dong, Chung-li;張經霖;Chang, Ching-lin
    Contributors: 淡江大學物理學系
    Keywords: CdSe;ferromagnetism;magnetic semiconductors;quantum dots
    Date: 2008-05
    Issue Date: 2010-08-10 09:30:44 (UTC+8)
    Publisher: Weinheim: Wiley - V C H Verlag GmbH & Co. KGaA
    Abstract: Hysteresis loops in D = 1.8 nm CdSe-TOPO nanoparticles show ferromagnetism at 5 K and 300 K. Charge transfer from Cd to the Cd-O bond is shown by arrow in the Fourier transforms amplitudes of the EXAFS k(2)chi data at the Cd K-edge in the smaller 2.8 and 4.1 nm particles. This charge transfer produces holes in the Cd 4d band yielding ferromagnetism varying as 1/D with magnetic moment mu = 0.0075 mu(B) per Cd surface atom.
    Relation: Advanced Materials 20(9), pp.1656-1660
    DOI: 10.1002/adma.200702382
    Appears in Collections:[Graduate Institute & Department of Physics] Journal Article

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