Incorporation of iron oxide nanoplarticles and quantum dots into silica microspheres

被引：233

作者：

Insin, Numpon ^{[1
]}

Tracy, Joseph B. ^{[1
]}

Lee, Hakho ^{[2
,3
]}

Zimmer, John P. ^{[1
]}

Westervelt, Robert M. ^{[2
,3
]}

Bawendi, Moungi G. ^{[1
]}

机构：

[1] MIT, Dept Chem, Cambridge, MA 02139 USA

[2] Harvard Univ, Div Appl Sci, Cambridge, MA 02138 USA

[3] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

来源：

ACS NANO | 2008年 / 2卷 / 02期

关键词：

silica microspheres; superparamagnetic; fluorescent; iron oxide nanoparticles; quantum dots; magnetic manipulation; multifunctional microspheres;

D O I：

10.1021/nn700344x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We describe the synthesis of magnetic and fluorescent silica microspheres fabricated by incorporating maghemite (gamma-Fe2O3) nanoparticles (MPs) and CdSe/CdZnS core/shell quantum dots (QDs) into a silica shell around preformed silica microspheres. The resultant similar to 500 nm microspheres have a narrow size distribution and show uniform incorporation of QDs and MPs into the shell. We have demonstrated manipulation of these microspheres using an external magnetic field with real-time fluorescence microscopy imaging.

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页码：197 / 202

页数：6

相关论文

共 31 条

[1] INFLUENCE OF CRYSTALLITE SIZE ON MAGNETIC PROPERTIES OF ACICULAR GAMMA-FE2O3 PARTICLES [J].

BERKOWIT.AE ;

SCHUELE, WJ ;

FLANDERS, PJ .

JOURNAL OF APPLIED PHYSICS, 1968, 39 (2P2) :1261-&

[2] SPIN PINNING AT FERRITE-ORGANIC INTERFACES [J].

BERKOWITZ, AE ;

LAHUT, JA ;

JACOBS, IS ;

LEVINSON, LM ;

FORESTER, DW .

PHYSICAL REVIEW LETTERS, 1975, 34 (10) :594-597

[3] Incorporation of luminescent nanocrystals into monodisperse core-shell silica microspheres [J].

Chan, Y ;

Zimmer, JP ;

Stroh, M ;

Steckel, JS ;

Jain, RK ;

Bawendi, MG .

ADVANCED MATERIALS, 2004, 16 (23-24) :2092-+

[4] Monodisperse magnetizable composite silica spheres with tunable dipolar interactions [J].

Claesson, EM ;

Philipse, AP .

LANGMUIR, 2005, 21 (21) :9412-9419

[5] Emission intensity dependence and single-exponential behavior in single colloidal quantum dot fluorescence lifetimes [J].

Fisher, BR ;

Eisler, HJ ;

Stott, NE ;

Bawendi, MG .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (01) :143-148

[6] Direct control of the magnetic interaction between iron oxide nanoparticles through dendrimer-mediated self-assembly [J].

Frankamp, BL ;

Boal, AK ;

Tuominen, MT ;

Rotello, VM .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (27) :9731-9735

[7] Semiconductor nanocrystals for biological imaging [J].

Fu, AH ;

Gu, WW ;

Larabell, C ;

Alivisatos, AP .

CURRENT OPINION IN NEUROBIOLOGY, 2005, 15 (05) :568-575

[8] Luminescent polymer microcapsules addressable by a magnetic field [J].

Gaponik, N ;

Radtchenko, IL ;

Sukhorukov, GB ;

Rogach, AL .

LANGMUIR, 2004, 20 (04) :1449-1452

[9] Synthesis and surface engineering of iron oxide nanoparticles for biomedical applications [J].

Gupta, AK ;

Gupta, M .

BIOMATERIALS, 2005, 26 (18) :3995-4021

[10] Fabrication of magnetic luminescent nanocomposites by a layer-by-layer self-assembly approach [J].

Hong, X ;

Li, J ;

Wang, MJ ;

Xu, JJ ;

Guo, W ;

Li, JH ;

Bai, YB ;

Li, TJ .

CHEMISTRY OF MATERIALS, 2004, 16 (21) :4022-4027

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