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Sequential Growth and Etching of Gold Nanocrystals Revealed by High‐Resolution Liquid Electron Microscopy
Author(s) -
Kim Sang Yun,
Dae Kyun Seong,
Koo Kunmo,
Kim Daewoon,
Park Jungjae,
Yuk Jong Min
Publication year - 2019
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201800949
Subject(s) - etching (microfabrication) , nanoparticle , nanocrystal , materials science , nanotechnology , electron microscope , colloidal gold , reactive ion etching , transmission electron microscopy , graphene , aqueous solution , resolution (logic) , ion , chemical engineering , chemistry , optics , organic chemistry , engineering , physics , layer (electronics) , artificial intelligence , computer science
Sequential growth and etching of Au nanoparticles in solution are observed in situ using the graphene liquid cell electron microscopy. Observation reveals that concentration of etching ions in aqueous growth solution leads transition from nanoparticle growth to its etching. At each step, the authors demonstrate different kinetics for both morphological evolutions and reaction rates. This study will likely benefit design strategies of nanoparticles with specific size or shape.