Nanoscale γ-AIO(OH) hollow spheres:: Synthesis and container-type functionality

被引：116

作者：

Buchold, Daniel H. M. ^{[1
]}

Feldmann, Claus ^{[1
]}

机构：

[1] Univ Karlsruhe, Inst Inorgan Chem, D-76131 Karlsruhe, Germany

来源：

NANO LETTERS | 2007年 / 7卷 / 11期

关键词：

D O I：

10.1021/nl072074f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

AIO(OH) hollow spheres are realized via a water-in-oil (w/o) microemulsion, applying the liquid-to-liquid-phase boundary of the micellar system as a template. Scanning electron microscopy, transmission electron microscopy (TEM), and dynamic light scattering analyses show the presence of nonagglomerated hollow spheres exhibiting an outer diameter of about 30 nm and a wall thickness of 5-6 nm. High-resolution TEM images show highly ordered lattice fringes, indicating the crystallinity of the sphere wall and identifying the wall to consist of gamma-AIO(OH) (boehmite). The container functionality of as-prepared AIO(OH) hollow spheres is validated as a proof of concept by encapsulating the fluorescent dye rhodamine (R6G) inside the alumina shell. Subsequent to centrifugation and careful purification, R6G is evidenced via photoluminescence to be still present. Finally, release of R6G is initiated by acidic dissolution of the sphere wall.

引用

页码：3489 / 3492

页数：4

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