State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
Langmuir. 2012 Oct 9;28(40):14461-9. doi: 10.1021/la303244p. Epub 2012 Sep 25.
We develop a facile method for preparing copper nanoparticles and patterned surfaces with copper stripes by ultraviolet (UV) irradiation of a mixture solution containing a photoinitiator and a copper-amine coordination compound. The copper-amine compound is formed by adding diethanol amine to an ethanol solution of copper chloride. Under UV irradiation, free radicals are generated by photoinitiator decomposition. Meanwhile, the copper-amine coordination compound is rapidly reduced to copper particles because the formation of the copper-amine coordination compound prevents the production of insoluble cuprous chloride. Poly(vinylpyrrolidone) is used as a capping agent to prevent the aggregation of the as-prepared copper nanoparticles. The capping agent increases the dispersion of copper nanoparticles in the ethanol solution and affects their size and morphology. Increasing the concentration of the copper-amine coordination compound to 0.1 M directly forms a patterned surface with copper stripes on the transparent substrate. This patterned surface is formed through the combination of the heterogeneous nucleation of copper nanoparticles and photolithography. We also investigate the mechanism of photoreduction by UV-vis spectroscopy and gas chromatography-mass spectrometry.
我们开发了一种简便的方法，通过含有光引发剂和铜-氨配位化合物的混合溶液的紫外（UV）辐射，制备铜纳米粒子和具有铜条纹的图案化表面。铜-氨化合物是通过向氯化铜的乙醇溶液中添加二乙醇胺形成的。在 UV 辐射下，光引发剂分解产生自由基。同时，由于铜-氨配位化合物的形成阻止了不溶性氯化亚铜的生成，因此铜-氨配位化合物迅速被还原为铜颗粒。聚（N-乙烯基吡咯烷酮）用作封端剂，以防止制备的铜纳米粒子聚集。封端剂增加了铜纳米粒子在乙醇溶液中的分散性，并影响其尺寸和形态。将铜-氨配位化合物的浓度增加到 0.1 M 会直接在透明基底上形成具有铜条纹的图案化表面。该图案化表面是通过铜纳米粒子的异质成核和光刻相结合形成的。我们还通过 UV-vis 光谱和气相色谱-质谱联用研究了光还原的机理。
