Mn2+ as a radial pressure gauge in colloidal core/shell nanocrystals
Mn2+ as a radial pressure gauge in colloidal core/shell nanocrystals
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DOI：
10.1103/physrevlett.99.265501
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发表时间：
2007-12-31
影响因子：
8.6
通讯作者：
Dubertret, Benoit
中科院分区：
文献类型：
--
作者：
Ithurria, Sandrine;Guyot-Sionnest, Philippe;Dubertret, Benoit
在径向可控位置掺杂于CdS/ZnS核/壳纳米晶体壳层中的Mn(2+)的荧光被用作纳米晶体壳层中压力的局域探针。随着壳层厚度增加，荧光发生红移，这表明对于7.5个单分子层的ZnS，压力超过4 GPa。由Mn(2+)荧光位移得出的压力的径向相关性和大小与球对称弹性连续介质模型以及核与外延壳之间7%的失配度高度吻合。
The fluorescence of Mn(2+) doped in the shell of CdS/ZnS core/shell nanocrystals at radially controlled position is used as a local probe of pressure in the nanocrystal shell. The redshift of the fluorescence with increasing shell thickness indicates a pressure of more than 4 GPa for 7.5 monolayers of ZnS. The radial dependence and magnitude of the pressure derived from the Mn(2+) fluorescence shift are in good agreement with the spherically symmetric elastic continuum model and the 7% misfit between the core and the epitaxial shell.