Please use this identifier to cite or link to this item:
|Title:||Thiol-capped ZnO nanowire/nanotube arrays with tunable magnetic properties at room temperature||Authors:||Deng, S.-Z.
ZnO nanotubes and nanowires
|Issue Date:||26-Jan-2010||Citation:||Deng, S.-Z., Fan, H.-M., Wang, M., Zheng, M.-R., Yi, J.-B., Wu, R.-Q., Tan, H.-R., Sow, C.-H., Ding, J., Feng, Y.-P., Loh, K.-P. (2010-01-26). Thiol-capped ZnO nanowire/nanotube arrays with tunable magnetic properties at room temperature. ACS Nano 4 (1) : 495-505. ScholarBank@NUS Repository. https://doi.org/10.1021/nn901353x||Abstract:||The present study reports room-temperature ferromagnetic behaviors in three-dimensional (3D)- aligned thiol-capped single-crystalline ZnO nanowire (NW) and nanotube (NT) arrays as well as polycrystalline ZnO NT arrays. Besides the observation of height-dependent saturation magnetization, a much higher Ms of 166 μemu cm -2 has been found in NTs compared to NWs (36 μemu cm -2) due to larger surface area in ZnO NTs, indicating morphology-dependent magnetic properties in ZnO NW/NT systems. Density functional calculations have revealed that the origin of ferromagnetism is mainly attributed to spin-polarized 3p electrons in S sites and, therefore, has a strong correlation with Zn-S bond anisotropy. The preferential magnetization direction of both single-crystalline NTs and NWs lies perpendicular to the tube/wire axis due to the aligned high anisotropy orientation of the Zn-S bonds on the lateral (100) face of ZnO NWs and NTs. Polycrystalline ZnO NTs, however, exhibit a preferential magnetization direction parallel to the tube axis which is ascribed to shape anisotropy dominating the magnetic response. Our results demonstrate the interplay of morphology, dimensions, and crystallinity on spin alignment and magnetic anisotropy in a 3D semiconductor nanosystem with interfacial magnetism. © 2010 American Chemical Society.||Source Title:||ACS Nano||URI:||http://scholarbank.nus.edu.sg/handle/10635/86812||ISSN:||19360851||DOI:||10.1021/nn901353x|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Aug 23, 2019
WEB OF SCIENCETM
checked on Aug 15, 2019
checked on Aug 17, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.