Coalescence of silver nanoparticles at room temperature: Unusual crystal structure transformation and dendrite formation induced by self-assembly

Michael Grouchko, Inna Popov, Vladimir Uvarov, Shlomo Magdassi*, Alexander Kamyshny

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

It was found that during the evaporation of water from a droplet of a silver nanoparticles dispersion a self-assembly process leads to the coalescence of the nanoparticles at room temperature and eventually results in a 3D, micrometer-sized dendrite. Direct in situ HR-TEM observation of coalescence events of individual nanoparticles revealed that during this process a transformation of the nanoparticles' crystal structure takes place, from the common fee silver structure to the unusual hcp structure. It was found that even-though a majority of the nanoparticles in the dispersion have the fee structure the obtained dendrites are characterized by the hep structure, reflecting the crystal structure transformation due to the coalescence process.

Original languageAmerican English
Pages (from-to)2501-2503
Number of pages3
JournalLangmuir
Volume25
Issue number4
DOIs
StatePublished - 17 Feb 2009

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