Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, USA.
Langmuir. 2010 May 18;26(10):7469-74. doi: 10.1021/la904199f.
Poly(allylamine)-stabilized spherical- and rod-shaped copper nanoparticles are synthesized by a simple chemical reaction. The synthesis is performed by the reduction of copper(II) salt with hydrazine in aqueous solution under atmospheric air in the presence of poly(allylamine) (PAAm) capping agent. Noteworthy of the advantages of the synthetic method includes its production of water dispersible copper nanoparticles at room temperature under no inert atmosphere, making the synthesis more environmentally friendly. The resulting copper nanoparticles are investigated by UV-vis spectroscopy and transmission electron microscopy (TEM). The results demonstrate that the amount of NaOH used is important for the formation of the copper nanoparticles while the reaction time and concentration of PAAm play key roles in controlling the size and shape of the nanoparticles, respectively. The resulting colloidal copper nanoparticles exhibit large surface-enhanced Raman scattering (SERS) signals.
聚(烯丙胺)-稳定的球形和棒状铜纳米粒子通过简单的化学反应合成。该合成是在大气空气中，在聚(烯丙胺)（PAAm）封端剂的存在下，用肼还原铜(II)盐在水溶液中进行的。该合成方法的优点之一是在室温下、无需惰性气氛下，即可在水中分散生成铜纳米粒子，使合成更环保。通过紫外-可见光谱和透射电子显微镜（TEM）对得到的铜纳米粒子进行了研究。结果表明，NaOH 的用量对铜纳米粒子的形成很重要，而反应时间和 PAAm 的浓度则分别在控制纳米粒子的尺寸和形状方面起着关键作用。所得胶体铜纳米粒子表现出大的表面增强拉曼散射（SERS）信号。
