Crosslinked, glassy styrenic surfactants stabilize quantum dots against environmental extremes
Cited 13 times inCited 12 times in
- Crosslinked, glassy styrenic surfactants stabilize quantum dots against environmental extremes
- Shibasaki, Y.; Kim, Byeong-Su; Young, A.J.; Mcloon, A.L.; Ekker, S.C.; Taton, T.A.
- Amphiphilics; Aqueous suspensions; Average diameter; CdSe/ZnS; Cross-linked shells; Crosslinked; Enhanced stability; Hydrophobic coatings; Micro-injection; Particle assemblies; Particle suspensions; Poly(acrylic acid ); Quantum Dot; Quantum dot nanoparticles; Reaction conditions; Surface preparation; Uniform layer; Vasculature; Zebrafish embryos
- Issue Date
- ROYAL SOC CHEMISTRY
- JOURNAL OF MATERIALS CHEMISTRY, v.19, no.35, pp.6324 - 6327
- Semiconductor, quantum dot (QD) nanoparticles (including CdSe/ZnS, CdTe/ZnS, and CdSe) were encapsulated within crosslinked shells of amphiphilic polystyrene-block-poly(acrylic acid) block copolymer. Transmission electron microscopy revealed that each particle was surrounded by a uniform layer of copolymer, and that the average diameter of the resulting QD-core micelles was between 25 and 50 nm, depending on the conditions of particle assembly. Overall, we found that aqueous suspensions of these QDs were substantially more stable to heat and pH than particles with other surface preparations; we argue that the enhanced stability is due to the uniform, hydrophobic coating of polystyrene around each particle and the reinforcement of this layer by shell-crosslinking. The biocompatibility of these particles was investigated by micro-injection of particle suspension into live zebrafish embryos. The particles permanently stained the fish vasculature, but did not interfere with the normal development of the fish. We propose that QDs encapsulated in crosslinked block-copolymer shells allow QDs to be used in biological or biotechnological protocols requiring harsh reaction conditions.
- ; Go to Link
- Appears in Collections:
- PHY_Journal Papers
- Files in This Item:
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.