Direct Electrodeposition of Aluminum Nanowires from a Room Temperature Ionic Liquid: An Electrochemical 2D-3D-1D Process

作者：Wang, Heng; Li, Bing^*

来源：Journal of the Electrochemical Society, 2018, 165(13): D641-D646.

DOI：10.1149/2.0991813jes

• TEMPLATE-FREE ELECTRODEPOSITION
• PULSE POTENTIAL ELECTRODEPOSITION
• GERMANIUM NANOWIRES
• TIN NANOWIRES
• GROWTH
• ARRAYS
• WIRES
• DEPOSITION
• BATTERIES
• NANOSTRUCTURES

Single-crystalline Al nanowires with diameters under 100 nm are successfully prepared by direct electrodeposition from a room temperature ionic liquid without using templates, additives or catalysts for the first time. We propose the three stages of nanowires growth mechanism including electrodeposition of the initial two dimensional nanofilm, subsequent electrochemical formation of three dimensional nano-nuclei and final one dimensional growth of nanowires. The electrodeposited Al nanowires can grow to lengths of up to 50 mu m in 120 s with an average growth rate more than 0.4 mu m/s, reaching a high aspect ratio over 1000. This study shows that the dimensions of nanowires are precisely controlled through the variation of electrode potential and are influenced by the electrodeposition temperature and time. The morphology of Al nanowires is very uniform and the nanowire diameters electrodeposited at -1.6 V/25 degrees C within 60 s are in the range of 17 nm to 50 nm. It is found that diffusion strongly influences the growth process.

• 出版日期2018-10-11
• 单位华东理工大学