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首页> 外文期刊>Applied Surface Science >Scalable fabrication of gold nanoparticles with adjustable size distribution as catalytic nuclei for the CVD growth of silicon nanowires
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Scalable fabrication of gold nanoparticles with adjustable size distribution as catalytic nuclei for the CVD growth of silicon nanowires

机译：具有可调节尺寸分布的金纳米颗粒的可扩展制备，作为催化核用于硅纳米线的CVD生长

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Gold nanoparticles were electrodeposited on carbon non-woven substrates from an acidic, alkaline free HAuCl4 electrolyte. The electrochemical behavior of the electrolyte was characterized by potentiostatic experiments. The deposition of the gold nanoparticles was performed by pulse plating, where the particles size distribution and surface coverage are adjusted by variation of the pulse parameters. A homogeneous surface coverage of 2.3% with a mean diameter of the gold nanoparticles of about 54 nm is obtained. The electroplating process is scaled up to a substrate size of 150 cm(2). The gold nanoparticles are used as catalytic nuclei for the growth of Si nanowires by vapor liquid solid mechanism. Finally, the basic applicability of these Si nanowire arrays as highly loaded anode for lithium ion batteries is demonstrated. The various reactions during (de)lithiation and their contribution to the anode capacity are identified, and performance features are exemplarily determined by half-cell tests of such a typical anode.
机译：将金纳米颗粒从酸性，无碱的HAuCl4电解质中电沉积到碳非织造基材上。通过恒电位实验表征了电解质的电化学行为。金纳米颗粒的沉积通过脉冲电镀进行，其中通过改变脉冲参数来调节粒度分布和表面覆盖率。获得2.3％的均匀表面覆盖率，金纳米颗粒的平均直径为约54 nm。电镀工艺的规模扩大到150 cm（2）。金纳米颗粒被用作催化核，通过汽液固相机理生长硅纳米线。最后，证明了这些硅纳米线阵列作为锂离子电池高负载阳极的基本适用性。识别（去）锂化期间的各种反应及其对阳极容量的贡献，并且通过这种典型阳极的半电池测试示例性地确定性能特征。

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