Hard Proof of the NaYF4/NaGdF4 Nanocrystal Core/Shell Structure

被引：223

作者：

Abel, Keith A. ^{[1
]}

Boyer, John-Christopher ^{[1
]}

van Veggel, Frank C. J. M. ^{[1
]}

机构：

[1] Univ Victoria, Dept Chem, Victoria, BC V8W 3V6, Canada

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 41期

基金：

加拿大创新基金会; 加拿大自然科学与工程研究理事会;

关键词：

CONTRAST AGENTS; CORE; NANOPARTICLES; SPECTROSCOPY; BEAMLINE;

D O I：

10.1021/ja906971y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Hexagonal-phase NaYF4/NaGdF4 core/shell nanocrystals were synthesized and investigated by X-ray photoelectron spectroscopy (XPS) using tunable synchrotron radiation. Based on the ratio of the Y3+ 3d to Gd3+ 4d core level intensities at varying photoelectron kinetic energies, we conclude that Gd3+ resides predominantly at the surface of the nanocrystals, proving a core/shell structure. These nanocrystals show potential for use as contrast agents in magnetic resonance imaging (MRI) applications and optical imaging.

引用

页码：14644 / +

页数：3

共 18 条

[1] Gd(III)-based contrast agents for MRI [J].

Aime, S ;

Botta, M ;

Terreno, E .

ADVANCES IN INORGANIC CHEMISTRY - INCLUDING BIOINORGANIC STUDIES, VOL 57: RELAXOMETRY OF WATER-METAL ION INTERACTIONS, 2005, 57 :173-237

[2] High resolution photoemission study of CdSe and CdSe/ZnS core-shell nanocrystals [J].

Borchert, H ;

Talapin, DV ;

McGinley, C ;

Adam, S ;

Lobo, A ;

de Castro, ARB ;

Möller, T ;

Weller, H .

JOURNAL OF CHEMICAL PHYSICS, 2003, 119 (03) :1800-1807

[3] Investigation of ZnS passivated InP nanocrystals by XPS [J].

Borchert, H ;

Haubold, S ;

Haase, M ;

Weller, H .

NANO LETTERS, 2002, 2 (02) :151-154

[4]

BOYER JC, LANGMUIR IN PRESS

[5] Synthesis, characterization, and spectroscopy of NaGdF4:: Ce3+, Tb3+/NaYF4 core/shell nanoparticles [J].

Boyer, John-Christopher ;

Gagnon, Jacinthe ;

Cuccia, Louis A. ;

Capobianco, John A. .

CHEMISTRY OF MATERIALS, 2007, 19 (14) :3358-3360

[6] Cation Exchange in Lanthanide Fluoride Nanoparticles [J].

Dong, Cunhai ;

van Veggel, Frank C. J. M. .

ACS NANO, 2009, 3 (01) :123-130

[7] Water-soluble GdF3 and GdF3/LaF3 nanoparticles-physical characterization and NMR relaxation properties [J].

Evanics, F. ;

Diamente, P. R. ;

van Veggel, F. C. J. M. ;

Stanisz, G. J. ;

Prosser, R. S. .

CHEMISTRY OF MATERIALS, 2006, 18 (10) :2499-2505

[8] Green-emitting CePO4:Th/LaPO4 core-shell nanoparticles with 70% photoluminescence quantum yield [J].

Kömpe, K ;

Borchert, H ;

Storz, J ;

Lobo, A ;

Adam, S ;

Möller, T ;

Haase, M .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (44) :5513-5516

[9] An efficient and user-friendly method for the synthesis of hexagonal-phase NaYF4: Yb, Er/Tm nanocrystals with controllable shape and upconversion fluorescence [J].

Li, Zhengquan ;

Zhang, Yong .

NANOTECHNOLOGY, 2008, 19 (34)

[10] Highly efficient multicolor up-conversion emissions and their mechanisms of monodisperse NaYF4:Yb,Er core and core/shell-structured nanocrystals [J].

Mai, Hao-Xin ;

Zhang, Ya-Wen ;

Sun, Ling-Dong ;

Yan, Chun-Hua .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (37) :13721-13729

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