In-situ encapsulation of quantum dots into polymer microspheres |
| |
Authors: | Sheng Wenchao Kim Sungjee Lee Jinwook Kim Sang-Wook Jensen Klavs Bawendi Moungi G |
| |
Institution: | Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA. |
| |
Abstract: | We have incorporated fluorescent quantum dots (QDs) into polystyrene microspheres using functionalized oligomeric phosphine (OP) ligands. We find that a uniform distribution of quantum dots is loaded inside each polymer bead. Some local close-packing of quantum dots in the beads is attributed to the self-polymerization of the functionalized ligands. The presence of quantum dots disturbs the nucleation and growth processes during the formation of polymer microspheres and results in a wider size distribution of the quantum dot-embedded polystyrene beads than for the control without dots. The change in quantum efficiency of the quantum dots before (approximately 20%) and after (12%) loading into the beads substantiates the protection of oligomeric phosphine ligands yet indicates that the properties of these quantum dots are still affected during processing. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|