Novel silver nanostructures from silver mirror reaction on reactive substrates
Novel silver nanostructures from silver mirror reaction on reactive substrates
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DOI：
10.1021/jp0515838
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发表时间：
2005-07-28
影响因子：
3.3
通讯作者：
Dai, LM
中科院分区：
文献类型：
--
作者：
Qu, LT;Dai, LM
通过在某些活性底物上进行银镜像反应，制备了新型银簇。分别在市售铜箔和砂纸摩擦铜箔上制备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对银簇的形态结构起着重要的调节作用。在不同条件下，用稀盐酸溶液在市购铜箔上进行银镜像反应，制备出从叶状到花状等不同形态的银纳米团簇。银纳米片水溶液的光学吸收光谱在约350 nm处具有宽的光散射峰，而传统的玻璃上银镜像反应的银纳米颗粒的相应表面等离子体吸收谱带在430 nm左右。
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.