title: Optimisation of ligand exchange towards stable water suspensions of crystalline NaYF4: Er3+, Yb3+ nanoluminophors.
abstract: NaYF4: 2%Er3+, 20%Yb3+ nanoparticles were synthesized through a wet chemical route. In order to transfer the nanoparticles from chloroform to aqueous solution an oleic acid to 3-mercaptopropionic acid ligand exchange process has been performed and optimized. The influence of temperature and atmosphere onto the NaYF4:2%Er3+, 20%Yb3+ nanoparticles water suspensions dispersibility and stability after replacing oleic acid with 3-mercaptopropionic acid ligands has been investigated. The results revealed an improvement of nanoparticles water suspension transparency and luminescence yield after ligand exchange process performed under inert atmosphere and at elevated temperature.
authors: Institute of Physical and Theoretical Chemistry, Department of Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland.
authors: D
authors: D
authors: Wawrzynczyk
authors: A
authors: A
authors: Bednarkiewicz
authors: M
authors: M
authors: Nyk
authors: J
authors: J
authors: Cichos
authors: M
authors: M
authors: Karbowiak
authors: D
authors: D
authors: Hreniak
authors: W
authors: W
authors: Strek
authors: M
authors: M
authors: Samoc