title: Direct synthesis and bonding origins of monolayer-protected silver nanocrystals from silver nitrate through in situ ligand exchange.
abstract: 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 NaBH4 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.
authors.affiliation: eMD Lab, Central R&D Institute, Samsung Electro-Mechanics, 314, Maetan3-Dong, Yeongtong-Gu, Suwon, Gyunggi-Do 443-743, Republic of Korea. kwijong.lee@samsung.com
authors.forename: Kwi Jong
authors.initials: KJ
authors.lastname: Lee
authors.forename: Young-Il
authors.initials: YI
authors.lastname: Lee
authors.forename: In-Keun
authors.initials: IK
authors.lastname: Shim
authors.forename: Jaewoo
authors.initials: J
authors.lastname: Joung
authors.forename: Yong Soo
authors.initials: YS
authors.lastname: Oh
mesh_terms: D000327:Adsorption; D001665:Binding Sites; D001894:Borohydrides / Q000737:chemistry; D002082:Butylamines / Q000737:chemistry*; D007850:Lauric Acids / Q000737:chemistry*; D008024:Ligands; D008567:Membranes, Artificial; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D012835:Silver Nitrate / Q000737:chemistry*; D013499:Surface Properties; D014050:Toluene / Q000737:chemistry*
chemical_list: D001894:Borohydrides; D002082:Butylamines; D007850:Lauric Acids; D008024:Ligands; D008567:Membranes, Artificial; C030358:lauric acid; D014050:Toluene; D012834:Silver; C025364:sodium borohydride; D012835:Silver Nitrate; C032462:n-butylamine