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Water-Soluble Pegylated Quantum Dots: From a Composite Hexagonal Phase to Isolated Micelles
- Source :
- Langmuir, Langmuir, American Chemical Society, 2006, 22 (23), pp.9797-803. ⟨10.1021/la061849h⟩, Langmuir, 2006, 22 (23), pp.9797-803. ⟨10.1021/la061849h⟩
- Publication Year :
- 2006
- Publisher :
- American Chemical Society (ACS), 2006.
-
Abstract
- We present a simple method based on the dispersion of fluorescent quantum dots (QD) into a liquid crystal phase that provides either nanostructured material or isolated QD micelles depending on water concentration. The liquid-crystal phase was obtained by using a gallate amphiphile with a poly(ethylene glycol) chain as the polar headgroup, named I. The hydration of QD/I mixtures resulted in the formation of a composite hexagonal phase identified by small-angle X-ray scattering and by polarized light and fluorescence optical microscopy, showing a homogeneous distribution of fluorescence within hexagonal phase. This composite mesophase can be converted into isolated QD-I micelles by dilution in water. The fluorescent QD-I micelles, purified by size exclusion chromatography, are well monodisperse with a hydrodynamic diameter of 20-30 nm. Moreover, these QD do not show any nonspecific adsorption on lipid or cell membranes. By simply adjusting the water content, the PEG gallate amphiphile I provides a simple method to prepare a self-organized composite phase or pegylated water soluble QD micelles for biological applications. journal article research support, non-u.s. gov't 2006 Nov 07 imported
- Subjects :
- [SDV]Life Sciences [q-bio]
MESH: Molecular Structure
Aucun
Electrons
MESH: Spectrum Analysis
02 engineering and technology
chemistry
010402 general chemistry
01 natural sciences
Micelle
Polyethylene Glycols
chemistry.chemical_compound
Microscopy, Electron, Transmission
Liquid crystal
Phase (matter)
Quantum Dots
Amphiphile
MESH: Water
Electrochemistry
General Materials Science
Micelles
Spectroscopy
MESH: Electrons
Chromatography
Molecular Structure
Spectrum Analysis
MESH: Micelles
Hexagonal phase
Water
Mesophase
MESH: Quantum Dots
Surfaces and Interfaces
Gallate
021001 nanoscience & nanotechnology
Condensed Matter Physics
Lipids
MESH: Lipids
0104 chemical sciences
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry
[SDV] Life Sciences [q-bio]
MESH: Solubility
[CHIM.THEO] Chemical Sciences/Theoretical and/or physical chemistry
Solubility
MESH: Polyethylene Glycols
Chemical engineering
MESH: Microscopy, Electron, Transmission
0210 nano-technology
Ethylene glycol
Subjects
Details
- ISSN :
- 15205827 and 07437463
- Volume :
- 22
- Database :
- OpenAIRE
- Journal :
- Langmuir
- Accession number :
- edsair.doi.dedup.....c1cabeff60b9b2d9ca6fac9be769adb8