...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of synchrotron radiation >Ascertaining the nanocluster formation within an ion-irradiated Pt/Ni/C multi-trilayer with X-ray absorption spectroscopy
【24h】

Ascertaining the nanocluster formation within an ion-irradiated Pt/Ni/C multi-trilayer with X-ray absorption spectroscopy

机译：用X射线吸收光谱法确定离子辐照的Pt / Ni / C多层三层内的纳米团簇形成

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this work nanoclusters formed in a Pt/Ni/C multi-trilayer by the ion-irradiated method of synthesis are characterized. In particular, an attempt to understand the role of interfaces in the synthesis is made. With this objective, ion-irradiation-induced structural changes in a Pt/Ni/C multi-trilayer using X-ray absorption spectroscopy (at the Ni K-edge) in conjunction with the X-ray standing-wave technique are investigated. The XANES analysis identifies chemical binding at pristine Ni/C and Ni/Pt interfaces, in contrast with physical adsorption at the Pt/C interface. The chemical nature of the interfaces determines their relative stability with respect to irradiation and controls the extent of metallic diffusion. The most interesting structural change, upon irradiation, is the disruption of the Pt/C interface and subsequent migration of Pt atoms towards pre-diffused Ni atoms within the C layer, leading to the formation of Ni-centered Ni-Pt bimetallic nanoclusters (with Ni:Pt = 60:40). These clusters are highly disordered beyond their nearest neighbor and find wide-scale applications as, for example, magnetic devices etc. The implications of these findings on the design goals are discussed.
机译：在这项工作中，表征了通过离子辐照合成方法在Pt / Ni / C多层三层中形成的纳米团簇。特别地，试图理解接口在综合中的作用。以此为目标，结合X射线驻波技术，利用X射线吸收光谱法（在Ni K边缘）研究了Pt / Ni / C多层膜中离子辐照引起的结构变化。 XANES分析确定了原始Ni / C和Ni / Pt界面的化学结合，与Pt / C界面的物理吸附相反。界面的化学性质决定了它们相对于辐射的相对稳定性，并控制了金属扩散的程度。辐照时最有趣的结构变化是Pt / C界面的破坏以及随后Pt原子向C层内的预扩散Ni原子迁移，导致形成以Ni为中心的Ni-Pt双金属纳米团簇（ Ni：Pt = 60:40）。这些簇高度混乱，超出了它们的最近邻居，并找到了广泛的应用，例如磁性设备等。讨论了这些发现对设计目标的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号