Transpassive Dissolution of Copper and Rapid Formation of Brilliant Colored Copper Oxide Films
Transpassive Dissolution of Copper and Rapid Formation of Brilliant Colored Copper Oxide Films
复制标题
DOI：
10.1149/1.3551525
复制
发表时间：
2011-01-01
影响因子：
3.9
通讯作者：
Burleigh, T. D.
中科院分区：
文献类型：
--
作者：
Fredj, N.;Burleigh, T. D.
本文描述了一种在铜表面生长粘附性氧化铜薄膜的电化学方法，该薄膜的颜色从金棕色到珍珠色，中间颜色从红紫色到金绿色。该技术包括在热氢氧化钠中以过钝化电位阳极溶解铜，然后在阳极电位关闭后在铜表面上沉积鲜艳的Cu（2）O膜。氧化铜膜的颜色取决于温度、阳极电位、极化时间t（1）和时间t（2），时间t（2）是电位关闭后的浸没时间。(At电位低于过钝化区，即在钝化区，氧化膜呈深灰色或深绿色哑光，表面有蓝色粉末氢氧化物，不美观。）用掠射角X射线衍射对薄膜进行了表征，发现薄膜主要是Cu（2）O。循环伏安法，计时电位法，扫描电子显微镜，和X-射线光电子能谱也被用来表征这些薄膜。这些技术表明，不同的颜色是由于孔隙率和厚度的差异，而不是成分的变化。(C)2011年电化学学会。[DOI：10.1149/1.3551525]保留所有权利。
This paper describes an electrochemical technique for growing adhesive copper oxide films on copper with attractive colors ranging from gold-brown to pearl with intermediate colors from red violet to gold green. The technique consists of anodically dissolving copper at transpassive potentials in hot sodium hydroxide, and then depositing brilliant color films of Cu(2)O onto the surface of copper after the anodic potential has been turned off. The color of the copper oxide film depends on the temperature, the anodic potential, the time t(1) of polarization, and the time t(2), which is the time of immersion after potential has been turned off. (At potentials lower than the transpassive region, that is, in the passive region, the oxide film is a dark gray or dark green matte with a blue powder hydroxide on the surface and it is not attractive.) The brilliant colored films were characterized using glancing angle x-ray diffraction, and the film was found to be primarily Cu(2)O. Cyclic voltammetry, chronopotentiometry, scanning electron microscopy, and x-ray photoelectron spectroscopy were also used to characterize these films. These techniques show that the different colors were due to differences in porosity and thickness rather than changes in composition. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3551525] All rights reserved.