Synthesis and characterization of magnetic and luminescent Fe3O4/CdTe nanocomposites using aspartic acid as linker

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	Synthesis and characterization of magnetic and luminescent Fe3O4/CdTe nanocomposites using aspartic acid as linker
其他题名	Synthesis and characterization of magnetic and luminescent Fe 3O 4/CdTe nanocomposites using aspartic acid as linker
	Wang Xiu Ling 1; Wei Lu 3; Tao Guan Hong 1; Huang Meng Qiong 2
发表期刊	CHINESE CHEMICAL LETTERS
ISSN	1001-8417
	2011
卷号	22 期号:2 页码:233-236
关键词	CDTE QUANTUM DOTS DRUG-DELIVERY NANOPARTICLES FABRICATION Fe3O4/CdTe nanocomposites Luminescent Magnetic Synthesis Aspartic acid
英文摘要	In this study, the preparation of a new kind of magnetic and luminescent Fe3O4/CdTe nanocomposites was demonstrated. Superparamagnetic Fe3O4 nanoparticles were first synthesized by hydrothermal coprecipitation of ferric and ferrous ions, followed by the modification of their surfaces with tetramethylammonium hydroxide (TMAOH) and the chemical activation with aspartic acid. The surface-modified Fe3O4 nanoparticles were then covalently coated with CdTe quantum dots (QDs), which were modified with mercaptoacetic acid (MPA), to form the Fe3O4/CdTe magnetic and luminescent nanocomposites through the coordination of the amino groups on the surfaces of Fe3O4 and the carboxyl groups on CdTe QDs. The structure and properties of as-synthesized nanocomposites were characterized. It was indicated that the nanocomposites possessed structure with an average diameter of 4050 nm, yellow-green emission feature and room temperature ferro-magnetism. Both the fluorescence and UV-vis absorption spectra of the nanocomposites showed a blue shift comparing with those of CdTe QDs. The mechanism of the blue shift was presented. The nanocomposites retained the ferromagnetic property with a saturation magnetization of 8.9 emu/g. (C) 2010 Guan Hong Tao. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
中文摘要	In this study, the preparation of a new kind of magnetic and luminescent Fe_3O_4/CdTe nanocomposites was demonstrated. Superparamagnetic Fe_3O_4 nanoparticles were first synthesized by hydrothermal coprecipitation of ferric and ferrous ions, followed by the modification of their surfaces with tetramethylammonium hydroxide (TMAOH) and the chemical activation with aspartic acid. The surface-modified Fe_3O_4 nanoparticles were then covalently coated with CdTe quantum dots (QDs), which were modified with mercaptoacetic acid (MPA), to form the Fe_3O_4/CdTe magnetic and luminescent nanocomposites through the coordination of the amino groups on the surfaces of Fe_3O_4 and the carboxyl groups on CdTe QDs. The structure and properties of as-synthesized nanocomposites were characterized. It was indicated that the nanocomposites possessed structure with an average diameter of 40-50 nm, yellow-green emission feature and room temperature ferro-magnetism. Both the fluorescence and UV-vis absorption spectra of the nanocomposites showed a blue shift comparing with those of CdTe QDs. The mechanism of the blue shift was presented. The nanocomposites retained the ferromagnetic property with a saturation magnetization of 8.9 emu/g
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:4146075
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/35062
专题	中国科学院烟台海岸带研究所
作者单位	1.Suzhou Univ, Sch Chem Chem Engn & Materials Sci, Suzhou 215123, Peoples R China 2.宿州学院 3.中国科学院烟台海岸带研究所
推荐引用方式 GB/T 7714	Wang Xiu Ling,Wei Lu,Tao Guan Hong,et al. Synthesis and characterization of magnetic and luminescent Fe3O4/CdTe nanocomposites using aspartic acid as linker[J]. CHINESE CHEMICAL LETTERS,2011,22(2):233-236.
APA	Wang Xiu Ling,Wei Lu,Tao Guan Hong,&Huang Meng Qiong.(2011).Synthesis and characterization of magnetic and luminescent Fe3O4/CdTe nanocomposites using aspartic acid as linker.CHINESE CHEMICAL LETTERS,22(2),233-236.
MLA	Wang Xiu Ling,et al."Synthesis and characterization of magnetic and luminescent Fe3O4/CdTe nanocomposites using aspartic acid as linker".CHINESE CHEMICAL LETTERS 22.2(2011):233-236.