Surface Single-Atom Tailoring of a Gold Nanoparticle
Surface Single-Atom Tailoring of a Gold Nanoparticle
复制标题
金纳米粒子的表面单原子剪裁
DOI：
10.1021/acs.jpclett.7b02982
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发表时间：
2018-01-04
影响因子：
5.7
通讯作者：
Wu, Zhikun
中科院分区：
文献类型：
--
作者：
Gan, Zibao;Chen, Jishi;Wu, Zhikun
金纳米粒子的表面单原子剪裁，即以可控的方式在结构分解的纳米粒子上添加、移除或替换一个表面原子，是非常令人兴奋的，但也是具有挑战性的，迄今为止尚未实现。本文报道了首次将单个硫原子引入到结构解开的Au60S6(SCH2Ph)（36）纳米颗粒表面的实现。单晶x射线晶体学表明，所制备的纳米颗粒由一个Au20S3(SCH2Ph)（18）和一个Au23S4(SCH2Ph)（18）基序保护的Au-17核组成，其中引入的硫原子以四面体配位的形式包含在其中，导致了内部结构和晶体排列的变化。与Au60S6(SCH2Ph)（36）晶体中的6HLH排列不同，Au60S7(SCH2Ph)（36）晶体中的“ABAB”排列增强了非晶Au60S7(SCH2Ph)（36）的固体光致发光，并带来了最大发射的轻微红移。广泛的近红外发射为Au60S7(SCH2Ph)（36）在防伪、成像等领域提供了潜在的应用前景。
Surface single-atom tailoring of a gold nanoparticle, that is, adding, removing, or replacing one surface atom on a structure-resolved nanoparticle in a controlled manner, is very exciting yet challenging and has not been hitherto achieved. Herein we report the first realization of the introduction of a single sulfur atom onto the surface of the structure-unraveled Au60S6(SCH2Ph)(36) nanoparticle. Single-crystal X-ray crystallography reveals that the as-obtained nanoparticle consists of one Au-17 kernel protected by one Au20S3(SCH2Ph)(18) and one unprecedented Au23S4(SCH2Ph)(18) motif with the introduced sulfur atom included as a tetrahedral-coordinated The introduced sulfur leads to the changes of both internal structure and crystallographic arrangement. Unlike the case of 6HLH arrangement in Au60S6(SCH2Ph)(36) crystals, the "ABAB" arrangement in Au60S7(SCH2Ph)(36) crystals enhances the solid photoluminescence of amorphous Au60S7(SCH2Ph)(36) and brings a slight redshift of the maximum emission. The extensive near-infrared emission provides Au60S7(SCH2Ph)(36) potential applications in some fields such as anticounterfeiting, imaging, etc.