Direct synthesis and bonding origins of monolayer-protected silver nanocrystals from silver nitrate through in situ ligand exchange

In this study, we attempt to present a direct synthesis of narrowly dispersed silver nanoparticles in a highly concentrated organic phase ( > 2   M ) without the use of a size-selection process. The fully organic phase system contains silver nitrate as a silver precursor, n-butylamine as a medium...

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Bibliographic Details
Published in:Journal of colloid and interface science 2006-12, Vol.304 (1), p.92-97
Main Authors: Lee, Kwi Jong, Lee, Young-Il, Shim, In-Keun, Joung, Jaewoo, Oh, Yong Soo
Format: Article
Language:English
Subjects:
Adsorption
Binding Sites
Borohydrides - chemistry
Butylamines - chemistry
Chemistry
Complex
Exact sciences and technology
General and physical chemistry
Lauric Acids - chemistry
Ligand
Ligands
Membranes, Artificial
Nano
Nanoparticles - chemistry
Particle Size
Silver
Silver - chemistry
Silver Nitrate - chemistry
Surface Properties
Toluene - chemistry
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Summary:In this study, we attempt to present a direct synthesis of narrowly dispersed silver nanoparticles in a highly concentrated organic phase ( > 2   M ) without the use of a size-selection process. The fully organic phase system contains silver nitrate as a silver precursor, n-butylamine as a medium dissolving the silver salt, dodecanoic acid as a capping molecule, toluene as a medium, and NaBH 4 as a reducing reagent. Even using only generic chemicals, monodisperse silver nanocrystals with a size of 7 nm were easily synthesized on the 100-g scale in a 1-L reactor. In addition, systematic studies revealed that the silver nanocrystals synthesized through in situ ligand exchange were stabilized through bidentate bridging of carboxyl groups in dodecanoic acid.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2006.08.037