Publication
Title
Direct observation of luminescent silver clusters confined in faujasite zeolites
Author
Abstract
One of the ultimate goals in the study of metal clusters is the correlation between the atomic-scale organization and their physicochemical properties. However, direct observation of the atomic organization of such minuscule metal clusters is heavily hindered by radiation damage imposed by the different characterization techniques. We present direct evidence of the structural arrangement, at an atomic level, of luminescent silver species stabilized in faujasite (FAU) zeolites using aberration-corrected scanning transmission electron microscopy. Two different silver clusters were identified in Ag-FAU zeolites, a trinuclear silver species associated with green emission and a tetranuclear silver species related to yellow emission. By combining direct imaging with complementary information obtained from X-ray powder diffraction and Rietveld analysis, we were able to elucidate the main differences at an atomic scale between luminescent (heat-treated) and nonluminescent (cation-exchanged) Ag-FAU zeolites. It is expected that such insights will trigger the directed synthesis of functional metal nanoclusterzeolite composites with tailored luminescent properties.
Language
English
Source (journal)
ACS nano
Publication
2016
ISSN
1936-0851
Volume/pages
10:8(2016), p. 7604-7611
Full text (Publishers DOI)
Full text (open access)
The author-created version that incorporates referee comments and is the accepted for publication version Available from 28.07.2017
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Record
Identification
Creation 28.07.2016
Last edited 22.11.2016
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