Surfactant-free synthesis and functionalization of gold nanoparticles.
A new, facile and generally applicable synthesis of functionalized gold nanoparticles is presented. It is based on the surfactant-free generation of weakly stabilized nanoparticles by the reduction of HAuCl4 with sodium naphthalenide in diglyme. These nanoparticles were found to lack long-term stability. However, stabilization in both unpolar and polar solvents could straightforwardly be achieved by subsequent addition of various capping ligands. The resulting ligand-capped gold nanoparticles were investigated by TEM microscopy, UV-vis, and FT-IR spectroscopy. Particle core size can be tuned by the amount of reduction agent. The strict separation of the reduction step and the functionalization step in this one-pot synthesis offers an easy and fast access to highly functionalized gold nanoparticles.
Schulz-Dobrick
Martin
M
Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany.
Sarathy
K Vijaya
KV
Jansen
Martin
M
D005026:Ethylene Glycols / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008738:Methyl Ethers / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis*; D010316:Particle Size
D005026:Ethylene Glycols; D008738:Methyl Ethers; D009942:Organometallic Compounds; D006046:Gold; C007391:diglyme