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Publication date: 2020-06
Volume: 16
ISSN: 1613-6810, 1613-6829 PMID: 32484276
DOI: 10.1002/smll.202002063
Publisher: Wiley

Author:

Fenwick, Oliver
Coutino-Gonzalez, Eduardo ; Richard, Fanny ; Bonacchi, Sara ; Baekelant, Wouter ; de Vos, Dirk ; Roeffaers, Maarten BJ ; Hofkens, Johan ; Samori, Paolo

Keywords:

Science & Technology, Physical Sciences, Technology, Chemistry, Multidisciplinary, Chemistry, Physical, Nanoscience & Nanotechnology, Materials Science, Multidisciplinary, Physics, Applied, Physics, Condensed Matter, Chemistry, Science & Technology - Other Topics, Materials Science, Physics, growth dynamics, Hill-Langmuir equation, luminescence, silver clusters, XPS analysis, zeolites, ELECTRICAL-PROPERTIES, AG NANOCLUSTERS, IRRADIATION, SPECTRA, PHOTOLUMINESCENCE, LOCATION, METAL

Abstract:

Herein, AlKα 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.