Real-time observation of Zn electro-deposition with high-resolution microradiology
We used phase contrast radiography to study the electro-deposition of Zn in real time and with high lateral resolution. Using unmonochromatic synchrotron X-rays and an optics-less imaging setup, we were able to obtain real-time radiographs of the electro-deposition in situ with gm resolution. A detailed analysis of the microstructure evolution relates the different growth parameters - such as the electric current density, the voltage bias, the pH value and the ion concentration - to very different growth morphology, ranging from film, porous, whisker and dendrite deposition. This link is both global and local. Local variations of the metal ion concentration in the electrolyte were also successfully imaged and the density profile is used to compare with the standard theory to explain the phenomenon of metal ion depletion near the electrode. The potential application of this technique to study growth with micropatterned electrodes and pulsed electric current is evaluated. (C) 2002 Elsevier Science B.V. All rights reserved.
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Acad Sinica, Inst Phys, Taipei 11529, Taiwan. China Steel Corp, Kaohsiung 81233, Taiwan. Pohang Univ Sci & Technol, Dept Mat Sci, Pohang 790784, South Korea. Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland. Hwu, Y, Acad Sinica, Inst Phys, 128 Acad Rd,Sec 2 Nankang, Taipei 11529, Taiwan.
ISI Document Delivery No.: 644NV
Record created on 2006-10-03, modified on 2016-08-08