Gao Zhuangqiang, Ye Haihang, Wang Qingxiao, Kim Moon J, Tang Dianyong, Xi Zheng, Wei Zhiyuan, Shao Shikuan, Xia Xiaohu
Department of Chemistry , University of Central Florida , Orlando , Florida 32816 , United States.
Department of Materials Science and Engineering , University of Texas at Dallas , Richardson , Texas 75080 , United States.
ACS Nano. 2020 Jan 28;14(1):791-801. doi: 10.1021/acsnano.9b07781. Epub 2020 Jan 14.
The ability to produce a diverse spectrum of hollow nanostructures is central to the advances in many current and emerging areas of technology. Herein, we report a general method to craft hollow nanostructures with highly tunable physical and chemical parameters. The key strategy is to regenerate the nanoscale sacrificial templates in a galvanic replacement reaction through site-selective overgrowth. As examples, we demonstrate the syntheses of nanocages and nanotubes made of silver, gold, palladium, and/or platinum with well-controlled wall thicknesses and elemental distributions. Using the nanocages of silver and gold as models, we demonstrate they possess intriguing plasmonic properties and offer superior performance in biosensing applications. This study provides a powerful platform to customize hollow nanostructures with desired properties and therefore is expected to enable a variety of fundamental studies and technologically important applications.
能够制造出多种多样的中空纳米结构是许多当前和新兴技术领域取得进展的核心。在此，我们报告了一种通用方法，用于制造具有高度可调物理和化学参数的中空纳米结构。关键策略是通过位点选择性过度生长在电置换反应中再生纳米级牺牲模板。作为示例，我们展示了由银、金、钯和/或铂制成的纳米笼和纳米管的合成，其壁厚和元素分布得到了很好的控制。以银和金的纳米笼为模型，我们证明它们具有有趣的等离子体特性，并在生物传感应用中表现出卓越性能。这项研究提供了一个强大的平台来定制具有所需特性的中空纳米结构，因此有望实现各种基础研究和具有重要技术意义的应用。
