College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
J Colloid Interface Sci. 2013 Oct 1;407:60-6. doi: 10.1016/j.jcis.2013.05.070. Epub 2013 Jun 13.
A facile approach based on seed-mediated method for synthesis of stacking faults enriched Ag nanowires (SFEANWs) was successfully developed. SFEANWs were formed and attached onto the seed (α-Fe2O3/Au) surfaces through the reduction of AgNO3 by ascorbic acid (AA) in the presence of sodium polyacrylate (PAANa). Their length can be tuned with different concentrations of AgNO3 or PAANa. According to the effects of seeds and PAANa, the plausible growth mechanism of SFEANWs was discussed. The catalytic activity of SFEANWs comparing with fivefold twinned Ag nanowires (FFTANWs) was evaluated through reducing p-nitrophenol by NaBH4. The activation energy of the classical reaction catalyzed by SFEANWs was calculated through the Arrhenius equation. In addition, these SFEANWs exhibited excellent surface enhanced Raman scattering (SERS) activities due to the hot spots located in the cross of the twist wires. The detection limit of by SERS for 1,4-benzenedithiol (1,4-BDT) was estimated about 10(-7) mol/L.
一种基于种子介导法合成富含层错的银纳米线（SFEANWs）的简便方法被成功开发。通过在聚天冬氨酸（PAANa）存在下，用抗坏血酸（AA）还原 AgNO3，在种子（α-Fe2O3/Au）表面形成并附着 SFEANWs。它们的长度可以通过不同浓度的 AgNO3 或 PAANa 来调节。根据种子和 PAANa 的作用，讨论了 SFEANWs 的可能生长机制。通过用 NaBH4 还原对硝基苯酚，评估了 SFEANWs 与五重孪晶银纳米线（FFTANWs）的催化活性。通过阿仑尼乌斯方程计算了由 SFEANWs 催化的经典反应的活化能。此外，由于在扭曲线的交点处存在热点，这些 SFEANWs 表现出优异的表面增强拉曼散射（SERS）活性。通过 SERS 对 1,4-苯二硫醇（1,4-BDT）的检测限估计约为 10(-7) mol/L。
