Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 43, Pages 13521-13525Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201708190
Keywords
gold nanoparticles; ligand shell morphology; mass spectrometry; materials science; surface chemistry
Categories
Funding
- Swiss National Foundation
- Nanofacturing
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Ligand exchange reactions are used to achieve nanoparticles coated with a mixture of ligand molecules. Currently, nothing is known on the evolution of the morphology of the ligand shell during the reaction. Here, we use a recently developed method (based on MALDI-TOF) to follow the evolution of the ligand shell composition and morphology during the reaction. We observe the expected evolution in composition and we find that the ligand shell starts as a random mixture and gradually evolves towards a patchy morphology. When the composition has reached a plateau (i.e. when the reaction is generally assumed to be finished), the ligand shell morphology keeps evolving for days, slowly approaching its equilibrium configuration.
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