Matter of age: growing anisotropic gold nanocrystals in organic media.
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.
Gaikwad
Anil V
AV
van't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV, Amsterdam, The Netherlands. eiser@science.uva.nl
Verschuren
Peter
P
Kinge
Sachin
S
Rothenberg
Gadi
G
Eiser
Erika
E
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
D005559:Formamides; D005561:Formates; D000644:Quaternary Ammonium Compounds; C528729:tetra-n-octylammonium formate; D006046:Gold; D004126:Dimethylformamide