title: Matter of age: growing anisotropic gold nanocrystals in organic media.
abstract: We investigated the influence of the reduction state of gold ions on the growth of gold nanocrystals in N,N-dimethyl formamide (DMF). While freshly prepared solutions of AuCl3 produce spherical nanocrystals, aged precursor solutions containing mainly Au+ ions and Au(0) atoms lead to various branched nanoparticles. Furthermore, we show that also the amount of the reducing and stabilisation agent tetra-n-octylammonium formate (TOAF) plays a decisive role on the shape of the nanocrystals, allowing us to grow triangular and cubic nanoparticles.
authors.affiliation: van't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV, Amsterdam, The Netherlands. eiser@science.uva.nl
authors.forename: Anil V
authors.initials: AV
authors.lastname: Gaikwad
authors.forename: Peter
authors.initials: P
authors.lastname: Verschuren
authors.forename: Sachin
authors.initials: S
authors.lastname: Kinge
authors.forename: Gadi
authors.initials: G
authors.lastname: Rothenberg
authors.forename: Erika
authors.initials: E
authors.lastname: Eiser
mesh_terms: D016880:Anisotropy; D003460:Crystallization; D004126:Dimethylformamide; D005559:Formamides / Q000737:chemistry*; D005561:Formates / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D005559:Formamides; D005561:Formates; D000644:Quaternary Ammonium Compounds; C528729:tetra-n-octylammonium formate; D006046:Gold; D004126:Dimethylformamide