Space-Confined Seeded Growth of Black Silver Nanostructures for Solar Steam Generation
Space-Confined Seeded Growth of Black Silver Nanostructures for Solar Steam Generation
复制标题
用于太阳能蒸汽发电的黑银纳米结构的空间限制种子生长
DOI：
10.1021/acs.nanolett.8b04157
复制
发表时间：
2019-01-01
期刊：
影响因子：
10.8
通讯作者：
Yin, Yadong
中科院分区：
文献类型：
--
作者：
Chen, Jinxing;Feng, Ji;Yin, Yadong
等离子体金属纳米结构由于其光热转换能力而在太阳能收集方面引起了相当大的关注。然而，传统等离子体纳米粒子的窄共振带极大地限制了它们的应用，因为只能利用太阳能的一小部分。在此，一个独特的限制籽晶生长策略被开发来合成黑色银纳米结构，在可见光和近红外光谱的宽带吸收。通过这种新的策略，具有广泛分布的粒子间距离的银纳米粒子的组装体在棒状管状空间中产生，导致强的随机等离子体激元耦合和相应的宽带吸收，从而显著提高太阳能的利用率。由于在将太阳能转化为热量方面具有优异的效率，所得到的黑色Ag纳米结构可以制成漂浮在空气/水界面处的薄膜，用于通过局部界面加热有效地产生清洁的水蒸汽。
Plasmonic metal nanostructures have attracted considerable attention for solar energy harvesting due to their capability in photothermal conversion. However, the narrow resonant band of the conventional plasmonic nanoparticles greatly limits their application as only a small fraction of the solar energy can be utilized. Herein, a unique confined seeded growth strategy is developed to synthesize black silver nanostructures with broadband absorption in the visible and near-infrared spectrum. Through this novel strategy, assemblages of silver nanoparticles with widely distributed interparticle distances are generated in rod-shaped tubular spaces, leading to strong random plasmonic coupling and accordingly broadband absorption for significantly improved utilization of solar energy. With excellent efficiency in converting solar energy to heat, the resulting black Ag nanostructures can be made into thin films floating at the air/water interface for efficient generation of clean water steam through localized interfacial heating.