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Copper ions mediated formation of three-dimensional self-assembled Ag nanostructures via a facile solution route

文献类型： 外文期刊

作者： Xu, Shuling 1 ; Wang, Lei 1 ; Li, Haibo 1 ; Yue, Qiaoli 1 ; Li, Rui 1 ; Liu, Jifeng 1 ; Gu, Xiaohong 2 ; Zhang, Shuqiu 2 ;

作者机构： 1.Liaocheng Univ, Dept Chem, Liaocheng 252059, Peoples R China

2.Shandong Acad Agr Sci, Shandong Prov Key Lab Test Technol Food Qual & Sa, Jinan 250100, Peoples R China

期刊名称：CRYSTENGCOMM （ 影响因子：3.545； 五年影响因子：3.297 ）

ISSN： 1466-8033

年卷期： 2013 年 15 卷 32 期

页码：

收录情况： SCI

摘要： Novel three-dimensional Ag nanoflowers (3DAN) were successfully synthesized through a facile Cu2+ mediated solution method using N,N-dimethylformamide (DMF), which serves as both a reducing agent and a solvent at room temperature. It was found that the introduction of a trace amount of Cu2+ could greatly slow the rate of the Ag+ reaction and thus this process effectively reduced the growth speed of Ag nanoparticles allowing 3DAN to be formed. The mechanism underlying the self-assembly process and shape evolution of 3DAN were systematically investigated by varying reaction time. X-Ray powder diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) were used to characterize the structure and morphology of the obtained products. X-Ray photoelectron spectroscopy (XPS) was used to assess the chemical state and surface composition of the 3DAN. UV-vis absorption spectra of the products collected from the reaction solution at various stages were taken to study their optical properties. In the measurement of surface-enhanced Raman scattering using rhodamine 6G (R6G) as the probe, the 3DAN exhibited a significant enhancement factor, indicating their potential applications in biosensing and nanodevices.

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