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首页 > 学术中心 > 学术ASAP > Direct electrospinning construction of nanocables
 

Direct electrospinning construction of nanocables

 
发布日期:2015-11-09     来源:永康乐业
 

Direct electrospinning construction of nanocables with electrical conductive-magnetic core and insulative-photoluminescent sheath.

Lei Han,Qianli Ma and Xiangting Dong

RSC Adv., 2015,5, 95674-95681

DOI:10.1039/C5RA16419B

Graphical abstract


Abstract    

Novel flexible luminescent-electrical-magnetic trifunctional nanocables have been successfully fabricated by specially designed coaxial spinnerets electrospinning technology. Europium complex Eu(TTA)3(TPPO)2 (TTA = 2-thenoyltrifluoroacetone, TPPO = triphenylphosphine oxide), PANI and Fe3O4 nanoparticles (NPs) were respectively incorporated into polyvinyl pyrrolidone (PVP) and electrospun into nanocables with Fe3O4/PANI/PVP as core and Eu(TTA)3(TPPO)2/PVP as the sheath. The morphology and properties of the final products were investigated in detail by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), fluorescence spectroscopy, Hall effect measurement system and vibrating sample magnetometer (VSM). SEM observation indicates that the diameter of the nanocables is 414 ± 13 nm. TEM analysis shows the core diameter is ca. 250 nm containing magnetic nanoparticles and polyaniline, and the sheath thickness is ca. 81 nm. Fluorescence emission peaks of Eu3+ ions in the [Fe3O4/PANI/PVP]@[Eu(TTA)3(TPPO)2/PVP] nanocables are observed and assigned to the energy levels transitions of 5D0  7F0 (579 nm), 5D0  7F1 (592 nm), 5D0  7F2 (614 nm), and the 5D0  7F2 hypersensitive transition at 614 nm is the dominant emission peak. The obtained nanocables possess better fluorescent intensity than their counterpart Fe3O4/PANI/Eu(TTA)3(TPPO)2/PVP composite nanofibers. The electrical conductivity of the core of nanocable reaches up to the order of 103 S cm1. The luminescent intensity, electrical conductivity and magnetic properties of the nanocables can be tunable by adjusting various amounts of rare earth complex, PANI and Fe3O4 NPs. The [Fe3O4/PANI/PVP]@[Eu(TTA)3(TPPO)2/PVP] flexible luminescent-electrical-magnetic trifunctional nanocables have potential applications in molecular electronics, biomedicine, microwave absorption and display device owing to their excellent multifunctionality.

 
 
 

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