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

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