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Reversible Clustering of Gold Nanoparticles under Confinement
Author(s) -
SánchezIglesias Ana,
Claes Nathalie,
Solís Diego M.,
Taboada Jose M.,
Bals Sara,
LizMarzán Luis M.,
Grzelczak Marek
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201800736
Subject(s) - nanoparticle , nanocapsules , dilution , solvent , kinetics , nanotechnology , plasmon , materials science , limiting , colloidal gold , chemical engineering , self assembly , chemistry , organic chemistry , mechanical engineering , physics , optoelectronics , quantum mechanics , engineering , thermodynamics
A limiting factor of solvent‐induced nanoparticle self‐assembly is the need for constant sample dilution in assembly/disassembly cycles. Changes in the nanoparticle concentration alter the kinetics of the subsequent assembly process, limiting optical signal recovery. Herein, we show that upon confining hydrophobic nanoparticles in permeable silica nanocapsules, the number of nanoparticles participating in cyclic aggregation remains constant despite bulk changes in solution, leading to highly reproducible plasmon band shifts at different solvent compositions.