Growth Mechanism and Electrical and Magnetic Properties of Ag–Fe3O4 Core–Shell Nanowires

• DOI: 10.1021/acsami.5b04342
• Publication Date: 2015-07-07T15:14:27Z
• Authors: Jingjing Ma; Kai Wang; Maosheng Zhan
• Keywords: Nanorod

One-dimensional Ag-Fe3O4 core-shell heteronanowires have been synthesized by a facile and effective coprecipitation method, in which silver nanowires (AgNWs) were used as the nucleation site for growth of Fe3O4 aqueous solution. The size morphology control achieved simple adjustments reaction conditions including FeCl3/FeCl2 concentration, poly(vinylpyrrolidone) (PVP) temperature, time. It was found that shell thickness could be tuned from 6 to 76 nm with variation between nanopheres nanorods. A possible mechanism proposed. First, C═O derived PVP on surface AgNWs provided points situ oxidation solution promoted accumulation Fe(3+) Fe(2+) surface. Second, nanoparticles nucleated Lastly, grew using up reagents. Higher concentration or higher temperature led faster growth, resulting formation nanorods, whereas lower resulted slower leading nanospheres. Furthermore, exhibited good electrical properties ferromagnetic at room temperature. Particularly, magnetic saturation values (Ms) increased 5.7 26.4 emu g(-1) increasing 9 nm. This 1D metal is meaningful both fundamental applied perspectives.