Stable aqueous dispersion of ZnO quantum dots with strong blue emission via simple solution route.
The aqueous dispersion of ZnO quantum dots (QDs) with strong blue emission (quantum yield of 76%) was synthesized through a simple solution route. The water stability of such QDs is provided by the hydroxyl groups on their surface, and the strong blue emission is suggested to arise from the formation of surface ZnO/oleic acid complexes. Under irradiation, these complexes are thought to absorb the excitation light with 3.54 eV and then generate the blue emission with 2.82 eV.
School of Materials Science and Engineering, Tianjin University, Tianjin 300072, PR China.
Ying-Song
YS
Fu
Xi-Wen
XW
Du
Sergei A
SA
Kulinich
Jian-Sheng
JS
Qiu
Wen-Jing
WJ
Qin
Rui
R
Li
Jing
J
Sun
Jim
J
Liu
D053768:Metal Nanoparticles; D046529:Microscopy, Electron, Transmission; D045663:Quantum Dots; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry*
D012996:Solutions; D014867:Water; D015034:Zinc Oxide