Effects of surface modification and SiO2 thickness on the optical and superparamagnetic properties of the water-soluble ZnS:Mn2+ nanowires/Fe3O4 quantum dots/SiO2 heterostructures

	Effects of surface modification and SiO2 thickness on the optical and superparamagnetic properties of the water-soluble ZnS:Mn2+ nanowires/Fe3O4 quantum dots/SiO2 heterostructures
	Cao J.; Wang B. J.; Han D. L.; Yang S.; Yang J. H.; Wei M. B.; Fan L.; Liu Q. Y.; Wang T. T.
	2013
发表期刊	Crystengcomm
ISSN	ISBN/1466-8033
卷号	15 期号:35
摘要	In this paper, one-dimensional ZnS:Mn2+ nanowires (NWs)/Fe3O4 quantum dots (QDs)/SiO2 heterostructures were successfully synthesized by the Stober method to form the water-soluble fluorescent/superparamagnetic nanocomposites. The average diameter of the ZnS:Mn2+ NWs, Fe3O4 QDs and ZnS:Mn2+ NWs/Fe3O4 QDs/SiO2 heterostructures was about 6-8 nm, 4-5 nm and 18 nm, respectively. The Fe3O4 QDs were covalently linked to the ZnS:Mn2+ NWs by the conjugation of the hydroxyl groups on the surface of the QDs and the carboxyl groups modified on the surface of the NWs. It was found that the covalent bonds between the NWs and QDs could effectively suppress the energy transfer from the ZnS:Mn2+ NWs to the Fe3O4 QDs. As the SiO2 shell thickness increased, the fluorescence intensity reached the highest value when the hydrolysis time of tetraethyl orthosilicate was 5 hours, which was comparable to that of the ZnS:Mn2+ NWs. The superparamagnetic properties of the heterostructures were observed at room temperature, which decreased as the SiO2 thickness increased.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/40632
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Cao J.,Wang B. J.,Han D. L.,et al. Effects of surface modification and SiO2 thickness on the optical and superparamagnetic properties of the water-soluble ZnS:Mn2+ nanowires/Fe3O4 quantum dots/SiO2 heterostructures[J]. Crystengcomm,2013,15(35).
APA	Cao J..,Wang B. J..,Han D. L..,Yang S..,Yang J. H..,...&Wang T. T..(2013).Effects of surface modification and SiO2 thickness on the optical and superparamagnetic properties of the water-soluble ZnS:Mn2+ nanowires/Fe3O4 quantum dots/SiO2 heterostructures.Crystengcomm,15(35).
MLA	Cao J.,et al."Effects of surface modification and SiO2 thickness on the optical and superparamagnetic properties of the water-soluble ZnS:Mn2+ nanowires/Fe3O4 quantum dots/SiO2 heterostructures".Crystengcomm 15.35(2013).

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