DC Field | Value | Language |
---|---|---|
dc.contributor.author | Zhang, Fan | ko |
dc.contributor.author | Shi, Yifeng | ko |
dc.contributor.author | Sun, Xiaohong | ko |
dc.contributor.author | Zhao, Dongyuan | ko |
dc.contributor.author | Stucky, Galen D. | ko |
dc.date.accessioned | 2013-03-08T17:51:25Z | - |
dc.date.available | 2013-03-08T17:51:25Z | - |
dc.date.created | 2012-03-13 | - |
dc.date.created | 2012-03-13 | - |
dc.date.issued | 2009-11 | - |
dc.identifier.citation | CHEMISTRY OF MATERIALS, v.21, no.21, pp.5237 - 5243 | - |
dc.identifier.issn | 0897-4756 | - |
dc.identifier.uri | http://hdl.handle.net/10203/93806 | - |
dc.description.abstract | In this work, we report a facile solution-phase synthesis of hollow cubic phase alpha-NaYF(4) nanoparticles by a controlled ion exchange process from Cubic phase Y(2)O(3) nanospheres. We demonstrate that hollow nanoparticles with controlled size are formed owing to the nanoscale Kirkendall effect. The formation mechanism was studied with the XRD, STEM, and EDS line scanning characterization. The crystal structure similarity between the parent and the final product is essential for framework and morphology preservation. Although the sphere particles are polycrystalline and composed of the nanocrystals, the cubic structure of alpha-NaYF(4) nanocrystals displays a noticeable structure similarity with Y(2)O(3), which we believe facilitates Ion exchange between the primary nanocrystals and preservation of the secondary sphere morphology. The multicolor Upconversion (UC) fluorescence (PL) was successfully realized in the Yb(3+)/Er(3+)(Tm(3+)) codoped alpha-NaYF(4) hollow nanospheres by excitation in the near-infrared (NIR) region. The various UC emission ratios of the samples were investigated as a function of hydrothermal reaction time to research the UC properties of the products and to further demonstrate the thermodynamic driving solution ion-exchange process. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | CATION-EXCHANGE | - |
dc.subject | NAYF4 NANOCRYSTALS | - |
dc.subject | SOLID-STATE | - |
dc.subject | EMISSION | - |
dc.subject | LUMINESCENCE | - |
dc.subject | ER3+ | - |
dc.subject | NANOPARTICLES | - |
dc.subject | FLUORESCENCE | - |
dc.subject | EXCITATION | - |
dc.subject | NANOTUBES | - |
dc.title | Formation of Hollow Upconversion Rare-Earth Fluoride Nanospheres: Nanoscale Kirkendall Effect During Ion Exchange | - |
dc.type | Article | - |
dc.identifier.wosid | 000271234300031 | - |
dc.identifier.scopusid | 2-s2.0-72449147296 | - |
dc.type.rims | ART | - |
dc.citation.volume | 21 | - |
dc.citation.issue | 21 | - |
dc.citation.beginningpage | 5237 | - |
dc.citation.endingpage | 5243 | - |
dc.citation.publicationname | CHEMISTRY OF MATERIALS | - |
dc.identifier.doi | 10.1021/cm902231s | - |
dc.contributor.nonIdAuthor | Zhang, Fan | - |
dc.contributor.nonIdAuthor | Shi, Yifeng | - |
dc.contributor.nonIdAuthor | Sun, Xiaohong | - |
dc.contributor.nonIdAuthor | Zhao, Dongyuan | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | CATION-EXCHANGE | - |
dc.subject.keywordPlus | NAYF4 NANOCRYSTALS | - |
dc.subject.keywordPlus | SOLID-STATE | - |
dc.subject.keywordPlus | EMISSION | - |
dc.subject.keywordPlus | LUMINESCENCE | - |
dc.subject.keywordPlus | ER3+ | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordPlus | FLUORESCENCE | - |
dc.subject.keywordPlus | EXCITATION | - |
dc.subject.keywordPlus | NANOTUBES | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.