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X-Ray-Induced Growth Dynamics of Luminescent Silver Clusters in Zeolites.
Fenwick, Oliver; Coutiño-Gonzalez, Eduardo; Richard, Fanny; Bonacchi, Sara; Baekelant, Wouter; de Vos, Dirk; Roeffaers, Maarten B J; Hofkens, Johan; Samorì, Paolo.
Affiliation
  • Fenwick O; University of Strasbourg, CNRS, ISIS UMR 7006, 8 Alleé Gaspard Monge, Strasbourg, F-67000, France.
  • Coutiño-Gonzalez E; School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London, E1 4NS, UK.
  • Richard F; Centro de Investigaciones en Óptica, A. C. Loma del Bosque 115, Colonia Lomas, del Campestre, León, Guanajuato, 37150, Mexico.
  • Bonacchi S; University of Strasbourg, CNRS, ISIS UMR 7006, 8 Alleé Gaspard Monge, Strasbourg, F-67000, France.
  • Baekelant W; University of Strasbourg, CNRS, ISIS UMR 7006, 8 Alleé Gaspard Monge, Strasbourg, F-67000, France.
  • de Vos D; Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo, 1, Padova, 35131, Italy.
  • Roeffaers MBJ; Chem&Tech-Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, Leuven, B-3001, Belgium.
  • Hofkens J; cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan, 200F, Heverlee, 3001, Belgium.
  • Samorì P; cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan, 200F, Heverlee, 3001, Belgium.
Small ; 16(26): e2002063, 2020 07.
Article in En | MEDLINE | ID: mdl-32484276
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.
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Small Journal subject: ENGENHARIA BIOMEDICA Year: 2020 Document type: Article Affiliation country: France

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Small Journal subject: ENGENHARIA BIOMEDICA Year: 2020 Document type: Article Affiliation country: France