Structural transitions in sodium chloride nanocrystals
Structural transitions in sodium chloride nanocrystals
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DOI：
10.1103/physrevlett.78.4213
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发表时间：
1997-06-02
影响因子：
8.6
通讯作者：
Jarrold, MF
中科院分区：
文献类型：
--
作者：
Hudgins, RR;Dugourd, P;Jarrold, MF
高分辨率的离子迁移率测量已被用来检查（NaCl）（n）Cl-纳米晶体与30和40之间的NaCl单位的结构转变。在环境温度下观察到具有不同j x k x l尺寸的散装碎片几何形状之间的变换。在其中一些转变中，接近一半的原子被重新定位，但阿仑尼乌斯活化能小于0.6 eV。表面扩散机制被提出来解释显着低的活化能。
High resolution ion mobility measurements have been used to examine structural transitions in (NaCl)(n)Cl- nanocrystals with between 30 and 40 NaCl units. Transformations between bulk fragment geometries with different j x k x l dimensions are observed at ambient temperatures. In some of these transformations, close to half the atoms are relocated, yet the Arrhenius activation energies are less than 0.6 eV. A surface diffusion mechanism is proposed to explain the remarkably low activation energies.