Lanthanide-doped NaYF4 nanocrystals in aqueous solution displaying strong up-conversion emission
| Autor(en): | Schaefer, Helmut Ptacek, Pavel Koempe, Karsten Haase, Markus |
Stichwörter: | Chemistry; Chemistry, Physical; ENERGY-TRANSFER; ER3+; Materials Science; Materials Science, Multidisciplinary; PHOSPHORS; QUANTUM DOTS; SIZE; SOLIDS; STATE; TM3+; YB3+ | Erscheinungsdatum: | 2007 | Herausgeber: | AMER CHEMICAL SOC | Journal: | CHEMISTRY OF MATERIALS | Volumen: | 19 | Ausgabe: | 6 | Startseite: | 1396 | Seitenende: | 1400 | Zusammenfassung: | NaYF4:Yb3+,Er3+ nanocrystals showing high colloidal solubility in water have been obtained by treating the nanocrystals with 1-hydroxyethane-1,1-diphosphonic acid (HEDP). HEDP attaches to the surface of the nanoparticles and leads to well-separated particles in aqueous solution as verified by IR spectroscopy and dynamic light scattering measurements. In addition, the surface modification with HEDP increases strongly the up-conversion efficiency of powders and aqueous colloidal solutions of the nanocrystals. These attractive features, above all the hydrophilic nature of the nanoparticles, should make them suitable especially for bio-applications. |
ISSN: | 08974756 | DOI: | 10.1021/cm062385b |
Zur Langanzeige
Seitenaufrufe
5
Letzte Woche
0
0
Letzter Monat
0
0
geprüft am 11.05.2024
