Preparation and characterization of bifunctional dendrimer modified Fe{sub 3}O{sub 4}/CdTe nanoparticles with both luminescent and superparamagnetic properties

Journal Article · Thu Oct 15 00:00:00 EDT 2015 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2015.03.019· OSTI ID:22475895

Wang, Xiuling ^[1]; Gu, Yinjun; Dong, Shuling ^[1]; Zhao, Qin ^[2]; Liu, Yongjian ^[1]

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1. Department of Chemical and Biological Engineering, Suzhou University of Science and Technology, Suzhou 215009 (China)
2. School of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu 226019 (China)

Highlights: • The fluorescent superparamagnetic dendrimeric Fe{sub 3}O{sub 4}/CdTe nanoparticles are synthesized in this paper. • The synthesized nanocomposites maintain excellent magnetic properties. • The synthesized nanocomposites maintain highly luminescent markers with narrow emission bands. - Abstract: Magnetic nanoparticles Fe{sub 3}O{sub 4} were prepared by hydrothermal coprecipitation of ferric and ferrous ions using NaOH. The surface modification of Fe{sub 3}O{sub 4} nanoparticle by dendrimers has rendered the nanoparticle surface with enriched amine groups which facilitated the adsorption and conjugation of thioglycolic acid (TGA) modified CdTe quantum dots to form a stable hybrid nanostructure. Three generations (first generation: G0F, second generation: G1F, third generation: G3F) of bifunctional dendrimeric Fe{sub 3}O{sub 4}/CdTe nanoparticles were successfully prepared using this technique and characterized by microscopy. The optical and magnetic properties of the dendrimeric Fe{sub 3}O{sub 4}/CdTe nanoparticle were also investigated. The microscopic study reveals 3 different sizes for 3 generations, 16 nm (G0F), 31 nm (G1F) and 47 nm (G3F). Among three generations of nanoparticles, the G1F has the best optical property with a luminescent quantum yield of 25.6% and the G0F has the best magnetic property with a saturation magnetization of 19.3 emμ/g.

• OSTI ID: 22475895
• Journal Information: Materials Research Bulletin, Vol. 70; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ADSORPTION
CADMIUM TELLURIDES
COPRECIPITATION
ELECTRON MICROSCOPY
FLUORESCENCE
IRON OXIDES
MAGNETIC PROPERTIES
MAGNETIZATION
NANOCOMPOSITES
NANOPARTICLES
OPTICAL PROPERTIES
QUANTUM DOTS
SATURATION
SODIUM HYDROXIDES
SUPERPARAMAGNETISM
SURFACES
THERMAL GRAVIMETRIC ANALYSIS