Improvement of dispersion stability and optical properties of CdSe/ZnSe structured quantum dots by polymer coating.
In this study, CdSe core and CdSe/ZnSe core/shell quantum dots with a narrow size distribution were synthesized in a micro-reactor. A PMMA coating applied to the surface of CdSe/ZnSe core/shell QDs to prevent degradation gave improved dispersion stability compared to the CdSe core and CdSe/ZnSe core/shell. Many previous approaches to dispersion stability have not been quantitatively assessed. The dispersion stability was confirmed by multiple light scattering measurement. Additionally, the PMMA-coated CdSe/ZnSe QDs showed greatly improved optical properties with a photoluminescence quantum yield up to 80%. This structural motif is expected to prevent the degradation of QDs.
Young-Tae
YT
Kwon
Nu Si A
NS
Eom
Yo-Min
YM
Choi
Bum-Sung
BS
Kim
Taek-Soo
TS
Kim
Chan-Gi
CG
Lee
Kun-Jae
KJ
Lee
Yong-Ho
YH
Choa
D065966:Absorption, Physicochemical; D019187:Cadmium Compounds / Q000737:chemistry*; D004355:Drug Stability; D055616:Microtechnology; D055620:Optical Phenomena; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D045663:Quantum Dots / Q000737:chemistry*; D018036:Selenium Compounds / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry*
D019187:Cadmium Compounds; D018036:Selenium Compounds; D017967:Zinc Compounds; D019904:Polymethyl Methacrylate; C058667:cadmium selenide; C044696:zinc selenide