Luminescent CdSe Quantum Dot Doped Stabilized Micelles
Citations Over TimeTop 10% of 2002 papers
Abstract
A general method was developed to prepare siloxane surfactant C16H33−N+(Me)2−CH2CH2CH2−Si(OMe)3 Cl- micelles doped with highly luminescent lipophilic semiconductor CdSe quantum dots (QDs). Encapsulated green emission CdSe QDs with an emission maximum at 525 nm and red emission QDs with an emission maximum at 650 nm show absorption and emission spectra similar to free CdSe QDs capped by trioctylphosphine oxide (TOPO). Transmission electron microscopy images reveal that the luminescent micelles range from 50 nm to 130 nm in diameter. Each micelle contains over 100 QDs, which significantly increases the emission signal of the composite nanostructure compared to individual QDs. This signal increase enables quantitative luminescence measurements of the QDs using conventional fluorescence microscopes and nonintensified CCD imaging systems, thus making the QD-doped micelles valuable tools in cellular imaging applications. Hydrolysis of the organosilane headgroup of the surfactant forms a silica layer on the surface of QD-doped micelles, which increases the stability of the micelles compared to ordinary surfactant micelles.
Related Papers
- → Highly Luminescent Monodisperse CdSe and CdSe/ZnS Nanocrystals Synthesized in a Hexadecylamine−Trioctylphosphine Oxide−Trioctylphospine Mixture(2001)1,486 cited
- → Surfactant as a carrier: influence of immunosuppressive agents on surfactant activity(2006)9 cited
- → Lanthanides Extraction by 8-Quinolinol and by a Mixture of Quinolinol and Trioctylphosphine Oxide(1998)3 cited
- Rhamnoilpid Bio-surfactant Composite Flooding Test Resuts and Understanding(2006)
- → Reverse Micelles, Enzymes(1999)