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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/52821


    Title: Quantum spins in Mackay icosahedral gold nanoparticles
    Authors: Wu,CM;Li,CY;Kuo,YT;Wang,CW;Wu,SY;Li,WH
    Contributors: 物理學系
    Date: 2010
    Issue Date: 2012-06-11 10:46:11 (UTC+8)
    Publisher: 國立中央大學
    Abstract: We report on the direct observation of the intrinsic magnetization behavior of Mackay icosahedral Au nanoparticles. The spin arrangements in 3.5-nm icosahedral Au particles are found to be ferrimagnetic-like, where the core and surface moments point in opposite directions, with a net spontaneous magnetic moment of 16 mu(B) per particle. The unpaired spins behave as J = 1/2 quantum spins. The average level separation is found to be a factor of similar to 1.53 larger than that estimated according to the Kubo formula for spherical Au particles. This reflects the fact that there are considerably fewer atoms packed in a particle with an icosahedral geometry than with a spherical one.
    Relation: JOURNAL OF NANOPARTICLE RESEARCH
    Appears in Collections:[物理學系] 期刊論文

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