X-Ray-Induced Growth Dynamics of Luminescent Silver Clusters in Zeolites.,Small

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X-Ray-Induced Growth Dynamics of Luminescent Silver Clusters in Zeolites.
Small ( IF 13.0 ) Pub Date : 2020-06-02 , DOI: 10.1002/smll.202002063
Oliver Fenwick _{1,

2} , Eduardo Coutiño-Gonzalez ₃ , Fanny Richard ₁ , Sara Bonacchi _{1,

4} , Wouter Baekelant ₅ , Dirk de Vos ₆ , Maarten B J Roeffaers ₆ , Johan Hofkens ₅ , Paolo Samorì ₁

Affiliation

Herein, AlK_α X‐rays are used to drive the growth of luminescent silver clusters in zeolites. The growth of the silver species is tracked using Auger spectroscopy and fluorescence microscopy, by monitoring the evolution from their ions to luminescent clusters and then metallic, dark nanoparticles. It is shown that the growth rate in different zeolites is determined by the mobility of the silver ions in the framework and that the growth dynamics in calcined samples obeys the Hill–Langmuir equation for noncooperative binding. Comparison of the optical properties of X‐ray‐grown silver clusters with silver clusters formed by standard heat treatment indicates that the latter have a higher specificity toward the formation of luminescent clusters of a specific (small) nuclearity, whereas the former produce a wide distribution of cluster species as well as larger nanoparticles.

中文翻译：

X射线诱导的沸石中发光银团簇的生长动力学。

在这里，ALK _αX射线用于驱动沸石中发光银团簇的生长。使用俄歇光谱仪和荧光显微镜，通过监测从其离子到发光团簇然后是金属的深色纳米颗粒的演变，来跟踪银物种的生长。结果表明，不同沸石的生长速率取决于框架中银离子的迁移率，并且煅烧样品中的生长动力学服从非合作结合的Hill-Langmuir方程。X射线生长的银团簇与通过标准热处理形成的银团簇的光学性质比较表明，后者对形成特定（小）核的发光团簇具有更高的特异性，

更新日期：2020-07-02

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