| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Preparation and Characterization of Bimodal Magnetofluorescent Nanoprobes for Biomedical Application |
| LEI Jie-Mei1, XU Xiao-Liang1**, LIU Ling1, YIN Nai-Qiang1, ZHU Li-Xin2** |
1Department of Physics, University of Science and Technology of China, Hefei 230026
2Center Laboratory, First Affiliated Hospital, Anhui Medical University, Hefei 230022 |
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| Cite this article: |
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LEI Jie-Mei, XU Xiao-Liang, LIU Ling et al 2012 Chin. Phys. Lett. 29 097803 |
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Abstract Magnetic-fluorescent bifunctional Fe3O4/SiO2-CdTeS nanocomposites are synthesized. Fe3O4 superparamagnetic nanoparticles are firstly prepared through the thermal decomposition of Fe oleate precursors and coated with a mesoporous silica shell using the St?ber method, and the silica surface is then modified with positively charged amino groups by adding 3-aminopropyltrimethoxysilane. Finally, negatively charged CdTeS quantum dots are linked and assembled onto the positively charged surface of Fe3O4/SiO2 through electrostatic interactions. X-ray diffraction, transmission electron microscopy, photoluminescence spectroscopy, and magnetometry are applied to characterize the nanocomposites. The results show that the bifunctional nanocomposites combine the optical properties of near-infrared CdTeS quantum dots with the superparamagnetic properties of Fe3O4 perfectly, expressing the potential application as a biocompatible magnetofuorescent nanoprobe for in vivo labelling.
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Received: 18 June 2012
Published: 01 October 2012
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| PACS: |
78.30.Fs
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(III-V and II-VI semiconductors)
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75.70.Cn
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(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
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87.64.kv
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(Fluorescence)
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