Provider: Ingenta Connect Database: Ingenta Connect Content: application/x-research-info-systems TY - ABST AU - Wawrzynczyk, D. AU - Bednarkiewicz, A. AU - Nyk, M. AU - Cichos, J. AU - Karbowiak, M. AU - Hreniak, D. AU - Strek, W. AU - Samoc, M. TI - Optimisation of Ligand Exchange Towards Stable Water Suspensions of Crystalline NaYF4: Er3+, Yb3+ Nanoluminophors JO - Journal of Nanoscience and Nanotechnology PY - 2012-03-01T00:00:00/// VL - 12 IS - 3 SP - 1886 EP - 1891 N2 - 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. UR - https://www.ingentaconnect.com/content/asp/jnn/2012/00000012/00000003/art00021 M3 - doi:10.1166/jnn.2012.5202 UR - https://doi.org/10.1166/jnn.2012.5202 ER -