Room temperature ferromagnetism at self-assembled monolayer modified Ag nanocluster–ZnO nanowire interface
Room temperature ferromagnetism at self-assembled monolayer modified Ag nanocluster–ZnO nanowire interface
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DOI：
10.1063/1.3025853
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发表时间：
2008-11
影响因子：
4
通讯作者：
S. Deng;K. Loh;J. Yi;J. Ding;H. Tan;Ming Lin;Y. Foo;Minrui Zheng;C. Sow
中科院分区：
文献类型：
--
作者：
S. Deng;K. Loh;J. Yi;J. Ding;H. Tan;Ming Lin;Y. Foo;Minrui Zheng;C. Sow
用硫醇封端的银纳米团簇（NC）修饰的ZnO纳米线（NW）的磁性表征揭示了室温下自发的场依赖性磁化和磁滞。饱和磁化强度对于13 nm硫醇封端的Ag NC是温度无关的，但是对于4 nm硫醇封端的Ag NC，饱和磁化强度出乎意料地随着温度而增加。高磁矩是由于Ag纳米粒子在ZnO纳米线支架上的有效分散以及Ag和ZnO之间的电荷转移相互作用造成的。4 nm纳米碳中的反常磁性行为可能是由于Zn-S偶极子介导的Ag-S偶极子的自旋重取向。
Magnetic characterization of ZnO nanowires (NW) decorated with thiol-capped Ag nanoclusters (NCs) reveals spontaneous field-dependent magnetization and hysteresis at room temperature. The saturation magnetization is temperature independent for the 13nm thiol-capped Ag NCs but unexpectedly increases with temperature for the 4nm thiol-capped Ag NCs. The high magnetic moment results from the efficient dispersal of Ag NCs on the ZnO NW scaffold and charge transfer interaction between Ag and ZnO. The anomalous magnetic behavior in 4nm NCs may be due to the spin reorientation of Ag–S dipoles mediated by Zn–S dipoles.