Synthesis and Optical Properties of KYF4/Yb, Er Nanocrystals, and their Surface Modification with Undoped KYF4
DC Element | Wert | Sprache |
---|---|---|
dc.contributor.author | Schaefer, Helmut | |
dc.contributor.author | Ptacek, Pavel | |
dc.contributor.author | Zerzouf, Otmane | |
dc.contributor.author | Haase, Markus | |
dc.date.accessioned | 2021-12-23T16:00:13Z | - |
dc.date.available | 2021-12-23T16:00:13Z | - |
dc.date.issued | 2008 | |
dc.identifier.issn | 1616301X | |
dc.identifier.uri | https://osnascholar.ub.uni-osnabrueck.de/handle/unios/4288 | - |
dc.description.abstract | KYF4/Yb3+, Er3+ nanocrystals with a mean diameter of approximately 13 nm were synthesized at 200 degrees C in the high boiling organic solvent N-(2-hydroxyethyl)ethylenediamine (HEEDA). The particles crystallize in the cubic phase known from alpha-NaYF4 and form transparent colloidal solutions in tetraethylene glycol (TEG) or propanol. Solutions containing I wt % of the nanocrystals in TEG display visible upconversion emission upon continuous wave (CW) excitation at 978 nm. Growing undoped KYF4 on the surface of the KYF4/Yb3+, Er3+ nanocrystals increases the upconversion efficiency by more than a factor of 20. The XRD data of these particles, display a slight increase in the mean particle size from 13 to 15.5 nm, indicating that only a part of the subsequently added KYF4 shell material is deposited onto the particle surface. Nevertheless the performed surface modification obviously leads to core/shell structured particles. | |
dc.language.iso | en | |
dc.publisher | WILEY-V C H VERLAG GMBH | |
dc.relation.ispartof | ADVANCED FUNCTIONAL MATERIALS | |
dc.subject | Chemistry | |
dc.subject | Chemistry, Multidisciplinary | |
dc.subject | Chemistry, Physical | |
dc.subject | DEPENDENCE | |
dc.subject | EMISSION | |
dc.subject | FLUORESCENCE | |
dc.subject | FLUORITE STRUCTURE | |
dc.subject | HEXAGONAL-PHASE | |
dc.subject | LANTHANIDE | |
dc.subject | LASER | |
dc.subject | Materials Science | |
dc.subject | Materials Science, Multidisciplinary | |
dc.subject | Nanoscience & Nanotechnology | |
dc.subject | Physics | |
dc.subject | Physics, Applied | |
dc.subject | Physics, Condensed Matter | |
dc.subject | Science & Technology - Other Topics | |
dc.subject | SPECTROSCOPY | |
dc.subject | UP-CONVERSION LUMINESCENCE | |
dc.subject | YB-KYF4 | |
dc.title | Synthesis and Optical Properties of KYF4/Yb, Er Nanocrystals, and their Surface Modification with Undoped KYF4 | |
dc.type | journal article | |
dc.identifier.doi | 10.1002/adfm.200800368 | |
dc.identifier.isi | ISI:000260398300008 | |
dc.description.volume | 18 | |
dc.description.issue | 19 | |
dc.description.startpage | 2913 | |
dc.description.endpage | 2918 | |
dc.contributor.orcid | 0000-0001-5906-3354 | |
dc.contributor.orcid | 0000-0002-9686-8810 | |
dc.contributor.researcherid | D-7919-2011 | |
dc.identifier.eissn | 16163028 | |
dc.publisher.place | POSTFACH 101161, 69451 WEINHEIM, GERMANY | |
dcterms.isPartOf.abbreviation | Adv. Funct. Mater. | |
crisitem.author.dept | Institut für Chemie neuer Materialien | - |
crisitem.author.deptid | institute11 | - |
crisitem.author.orcid | 0000-0002-9686-8810 | - |
crisitem.author.parentorg | FB 05 - Biologie/Chemie | - |
crisitem.author.grandparentorg | Universität Osnabrück | - |
crisitem.author.netid | HaMa954 | - |
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geprüft am 05.06.2024