Fine-tuning size of gold nanoparticles by cooling during reverse micelle synthesis.
By lowering the reaction temperature during metal ion reduction in a reverse micelle system, gold nanoparticle size can be subtly tuned from 6.6 to 2.2 nm in diameter. Under these reaction conditions, the water-to-surfactant ratio (W value) also plays an important role in controlling the particle size, enabling a wide range of products obtainable via a simple, quick, reproducible synthesis. Particle sizes were measured by HRTEM, and size trends were supported by UV-vis spectroscopy.
Smetana
Alexander B
AB
Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343, USA.
Wang
Joanna Shaofen
JS
Boeckl
John
J
Brown
Gail J
GJ
Wai
Chien M
CM