Selective Cation Exchange Enabled Growth of Lanthanide Core/Shell Nanoparticles with Dissimilar Structure
文献类型：期刊论文
| 作者 | Dong, H; Sun, LD; Li, LD; Si, R; Liu, R; Yan, CH |
| 刊名 | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
 |
| 出版日期 | 2017 |
| 卷号 | 139期号:51页码:18492-18495 |
| 关键词 | CORE-SHELL NANOPARTICLES UP-CONVERSION EPITAXIAL-GROWTH NANOCRYSTALS EMISSION PRECURSOR THERAPY SURFACE STRAIN LIGHT |
| ISSN号 | 0002-7863 |
| DOI | 10.1021/jacs.7b11836 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Core/shell nanostructure is versatile for improving or integrating diverse functions, yet it is still limited to homeomorphism with isomorphic core and shell structure. Here, we delineate a selective cation exchange strategy to construct lanthanide core/shell nanoparticles with dissimilar structure. Hexagonal NaLnF(4), a typical photon conversion material, was selected to grow cubic CaF2 shell to protect surface exposed Ln(3+). Preferential cation exchange between Ca2+ and Na+ triggered the surface hexagonal-to-cubic structure evolution, which remediated the large barrier for heteroepitaxy of monocrystalline CaF2 shell. The heterostructured CaF2 shell leads to greatly enhanced upconversion emission with increased absolute quantum yield from 0.2% to 3.7%. Moreover, it is advantageous in suppressing the interfacial diffusion of Ln(3+), as well as the leakage of Ln(3+) from nanoparticle to aqueous system. These findings open up a new avenue for fabricating heterostructured core/shell nanoparticles, and are instructive for modulating various properties. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31099]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Peking Univ, PKU HKU Joint Lab Rare Earth Mat & Bioinorgan Che, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci,Coll Chem & Mol Engn, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong, H,Sun, LD,Li, LD,et al. Selective Cation Exchange Enabled Growth of Lanthanide Core/Shell Nanoparticles with Dissimilar Structure[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2017,139(51):18492-18495. |
| APA | Dong, H,Sun, LD,Li, LD,Si, R,Liu, R,&Yan, CH.(2017).Selective Cation Exchange Enabled Growth of Lanthanide Core/Shell Nanoparticles with Dissimilar Structure.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,139(51),18492-18495. |
| MLA | Dong, H,et al."Selective Cation Exchange Enabled Growth of Lanthanide Core/Shell Nanoparticles with Dissimilar Structure".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 139.51(2017):18492-18495. |
入库方式： OAI收割
来源：上海应用物理研究所
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