Three-dimensional elemental mapping of hollow Fe2O3@SiO2 mesoporous spheres using scanning confocal electron microscopy

被引:12
|
作者
Wang, Peng [1 ,2 ,3 ]
Hashimoto, Ayako [4 ,5 ,6 ]
Takeguchi, Masaki [4 ,6 ]
Mitsuishi, Kazutaka [4 ,5 ,6 ]
Shimojo, Masayuki [7 ]
Zhu, Yufang [9 ]
Okuda, Mitsuhiro [8 ]
Kirkland, Angus I. [3 ]
Nellist, Peter D. [3 ]
机构
[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[2] Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China
[3] Univ Oxford, Dept Mat, Oxford OX1 3PH, England
[4] Natl Inst Mat Sci, Surface Phys & Struct Unit, Tsukuba, Ibaraki 3050047, Japan
[5] Natl Inst Mat Sci, Global Res Ctr Environm & Energy Based Nanomat Sc, Tsukuba, Ibaraki 3050047, Japan
[6] Natl Inst Mat Sci, Electron Microscopy Stn, Tsukuba, Ibaraki 3050003, Japan
[7] Shibaura Inst Technol, Dept Mat Sci & Engn, Koto Ku, Tokyo 1358548, Japan
[8] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England
[9] NIMS, Int Ctr Young Sci, Tsukuba, Ibaraki 3050047, Japan
基金
日本学术振兴会; 英国工程与自然科学研究理事会;
关键词
BRIGHT-FIELD; TOMOGRAPHY; SCATTERING;
D O I
10.1063/1.4714889
中图分类号
O59 [应用物理学];
学科分类号
摘要
Energy filtered scanning confocal electron microscopy (EFSCEM) in an aberration-corrected transmission electron microscope offers an approach for three-dimensional imaging and chemical analysis of nanoscale materials related to the well-established technique of confocal scanning optical microscopy. Here, we apply EFSCEM to the compositional analysis of the core structure in candidate structures for targeted drug delivery. Element-specific optical sectioning along the specimen depth direction demonstrates the presence of additional Si in a nominal Fe2O3 core. The presence of Si in the core is consistent with a specific formation mechanism for the hollow structure of the core. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4714889]
引用
收藏
页数:4
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