High-quality ZnS shells for CdSe nanoparticles: rapid microwave synthesis.
Using a domestic microwave oven and new, inexpensive precursors, a rapid and reliable synthesis of highly luminescent CdSe/ZnS NPs was developed. To evaluate the quality of our core/shell particles for varying shell thickness in comparison to that of CdSe/ZnS nanoparticles obtained commercially, the parameter fluorescence quantum yield is been used as well as a new, straightforward, thiophenol-based shell-quality test as a tool to ensure a dense ZnS shell without holes and cracks, which is a prerequisite for high luminescence and stability.
Ziegler
Jan
J
Laboratory for Nanosciences, Freiburg Material Research Centre (FMF), Albert Ludwig University Freiburg, Stefan-Meier Strasse 21, 79104 Freiburg, Germany.
Merkulov
Alexei
A
Grabolle
Markus
M
Resch-Genger
Ute
U
Nann
Thomas
T
D015374:Biosensing Techniques / Q000379:methods*; D049408:Luminescent Agents / Q000138:chemical synthesis*; D008872:Microwaves; D053758:Nanoparticles / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry; D018038:Sodium Selenite / Q000737:chemistry*; D013438:Sulfhydryl Compounds / Q000737:chemistry; D013440:Sulfides / Q000737:chemistry*; D013997:Time Factors; D017967:Zinc Compounds / Q000737:chemistry*
D049408:Luminescent Agents; D010636:Phenols; D013438:Sulfhydryl Compounds; D013440:Sulfides; D017967:Zinc Compounds; C042983:thiophenol; D018038:Sodium Selenite; C031238:zinc sulfide