两步隧穿为主的电沉积，可在具有特定表面构型的天然氧化层钝化的硅电极上大规模生产超长波浪金属微结构,The Journal of Physical Chemistry C

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两步隧穿为主的电沉积，可在具有特定表面构型的天然氧化层钝化的硅电极上大规模生产超长波浪金属微结构
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2019-06-21 , DOI: 10.1021/acs.jpcc.9b04700
Yingjie Su ₁ , Hua Ren ₁ , Haiping Jiang ₁ , Shaochun Tang ₁ , Haiming Lu ₁ , Xiangkang Meng ₁

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波浪形金属材料在各种应用中起着重要作用。这种材料的当前合成策略限于自顶向下的金属薄膜蚀刻。请注意，自上而下的蚀刻不可避免地要比自下而上的类似物处理更多的表面悬空键，并导致化学稳定性差。然而，到目前为止，还没有提出自下而上的方法来生产波浪形金属材料。在这里，以铜为模型材料，据报道，采用自底向上的两阶段隧穿为主的电沉积策略，可在光刻图案化的，天然氧化物层钝化的硅电极上产生超长的铜波浪形微结构（WMS），在该电极上直接进行电子转移受阻。扫描电子显微镜和场发射扫描电子显微镜结果表明，由互连的八面体和立方八面体纳米粒子组成的Cu WMS的大规模生产。这I – V曲线表明所沉积的Cu WMS具有良好的电性能。加上铜材料的固有特性，例如高导热性，高的CO ₂还原反应选择性和良好的生物相容性，铜WMS的独特结构特征确保它们可广泛用于电子，催化和化学反应中。生物技术。而且，可以合理地预期，这种方法对于包括（但不限于）银，金和铂的各种金属是有效的。

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Two-Stage Tunneling-Dominated Electrodeposition for Large-Scale Production of Ultralong Wavy Metal Microstructures on Native Oxide Layer-Passivated Si Electrode with Specific Surface Configuration

Wavy-shaped metallic materials play a significant role in various applications. The current synthesis strategy for such materials is limited to top-down thin metal film etching. Note that top-down etching is inevitable to process more surface dangling bonds than their bottom-up analogues and results in poor chemical stability. However, up to now, no bottom-up method has been presented to produce wavy-shaped metallic materials. Here, taking Cu as a model material, a bottom-up two-stage tunneling-dominated electrodeposition strategy is reported to produce ultralong Cu wavy microstructures (WMSs) on a lithographically patterned and native oxide layer-passivated Si electrode, where direct electron transfer is impeded. Scanning electron microscopy and field-emission scanning electron microscopy results demonstrate the large-scale production of Cu WMSs consisting of interconnected octahedral and cuboctahedral nanoparticles. The I–V curve suggests good electrical performance of the as-deposited Cu WMSs. Together with the inherent properties of the Cu material, for example, high thermal conductivity, high product selectivity for CO₂ reduction reaction, and good biocompatibility, the distinctive structural characteristics of Cu WMSs ensure that they could be widely used in electronics, catalysis, and biotechnology. Moreover, it is reasonably expected that such a method can be efficacious for various metals including (but not limited to) silver, gold, and platinum.

更新日期：2019-06-21

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