Qu Liangti, Dai Liming
Department of Chemical and Materials Engineering, School of Engineering, The University of Dayton, 300 College Park, Dayton, Ohio 45469-0240, USA.
J Phys Chem B. 2005 Jul 28;109(29):13985-90. doi: 10.1021/jp0515838.
Novel silver clusters have been prepared by simply carrying out the silver mirror reaction on certain reactive substrates. Leaflike fractal silver microstructures and perpendicularly aligned silver nanosheets were produced on a commercially available copper foil and sandpaper-rubbed copper foil, respectively. The surface features of copper foils and the chemical state of Cu atoms play important roles in regulating the morphological structures of the resulting silver clusters. Silver nanoclusters with various morphologies ranging from the leaflike to flowerlike hierarchical structures can be produced from the silver mirror reaction on commercially available copper foils after being treated with a dilute aqueous HCl solution under different conditions. The aqueous solution of silver nanosheets shows an optical absorption spectrum with a broad light-scattering peak at about 350 nm, compared to a corresponding surface plasmon absorption band around 430 nm for silver nanoparticles from the conventional silver mirror reaction on glass.
通过在某些反应性底物上简单地进行银镜反应制备了新型银簇。分别在市售铜箔和砂纸摩擦过的铜箔上制备出了叶状分形银微结构和垂直排列的银纳米片。铜箔的表面特征和铜原子的化学状态在调节所得银簇的形态结构中起着重要作用。在不同条件下用稀盐酸水溶液处理后，市售铜箔上的银镜反应可产生从叶状到花状分级结构等各种形态的银纳米簇。与传统银镜反应在玻璃上产生的银纳米颗粒在约430nm处的相应表面等离子体吸收带相比，银纳米片的水溶液显示出在约350nm处具有宽光散射峰的光学吸收光谱。
