Quantum-confined GaN nanoparticles synthesized via liquid-ammonia-in-oil-microemulsions.
GaN nanoparticles, 3-4 nm in size, are synthesized in a microemulsion using liquid ammonia as the polar droplet phase. Surprisingly, GaN is readily crystalline although prepared at -40 °C. The nanoparticles show a band gap of 4.4 eV as well as light emission with its maximum at 336 nm. Both confirm the expected quantum-confinement effect.
Karlsruhe Institute of Technology (KIT), Institut für Anorganische Chemie, Engesserstraße 15, D-76131 Karlsruhe, Germany. claus.feldmann@kit.edu.
Fabian
F
Gyger
Pascal
P
Bockstaller
Henriette
H
Gröger
Dagmar
D
Gerthsen
Claus
C
Feldmann