Vapour confinement as a strategy to fabricate metal and bimetallic nanostructures.
Vapour confinement as a strategy to fabricate metal and bimetallic nanostructures.
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DOI：
10.1039/d0na00467g
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发表时间：
2020-09-16
影响因子：
4.7
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中科院分区：
文献类型：
--
作者：
金属纳米结构在生物医学、等离子体、储氢和高能电池等领域的应用引起了人们的广泛关注。然而，合成各种高活性元素（如Mg）的纳米结构仍然是一项艰巨的任务，目前还没有单一的方法来合成这种纳米结构。在这项工作中，我们在没有任何载气的情况下，基于热蒸发的单一方法生产了镁纳米颗粒（NPs）、纳米线（NWs）和纳米针（NNs）。重要的是，我们通过快速热加工（RTP）炉快速加热和冷却来控制纳米结构的成核和生长。锌和镁锌纳米结构的测试是为了验证我们的方法和其他金属和双金属的设计。有趣的是，铜和银纳米颗粒是在合理控制下由金属盐（金属醋酸盐和硝酸盐）制备的。各种纳米结构的调谐可以通过(i)与用于蒸发的石英瓶的曲率/外径相互作用和（ii）通过改变衬底的位置来实现。更具体地说，石英瓶的曲率增加了蒸汽碰撞，有效地降低了蒸汽的热能。总的来说，这有利于控制和限制蒸汽到基材上，并实现过饱和。同时，它可以在没有任何载气的情况下形成各种纳米结构。所提出的实验装置是一种多功能、简单、单步且经济高效的生产高质量纳米结构的解决方案。图中为热蒸发法制备不同镁纳米结构的示意图。
Metal nanostructures have attracted much attention in biomedical, plasmonic, hydrogen storage, and high-energy battery applications. However, the synthesis of various nanostructures of highly reactive elements (e.g. Mg) is still a difficult task and no single-approach has been reported for synthesizing such nanostructures. In this work, we produced magnesium nanoparticles (NPs), nanowires (NWs) and nanoneedles (NNs) in a single-approach, based on thermal evaporation without any carrier gas. Importantly, we employed rapid heating and cooling via a rapid thermal processing (RTP) furnace to control the nucleation and growth of nanostructures. The testing of Zn and Mg–Zn nanostructures was done to validate our approach and design for other metals and bimetallics. Interestingly, Cu and Ag nanoparticles were produced from metal salts (metal acetates and nitrates) with a reasonable control. The tuning of various nanostructures was possible by interplaying (i) with the curvature/outer diameter of the quartz bottle used for evaporation and (ii) by varying the position of the substrates. More specifically, the curvature of the quartz bottle increased the vapour collisions and effectively reduced the thermal energy of the vapour. Altogether, this favoured the control and confinement of vapour onto substrates and achieved supersaturation. Simultaneously, it led to the formation of various nanostructures without any carrier gas. The presented experimental set up is a versatile, simple, single-step and cost-effective solution for producing high-quality nanostructures. The schematic representation shows the synthesis of different Mg nanostructures using the thermal evaporation method.
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影响因子：
4.6
作者：
Liu, Zhen;Yang, Bin;Lookman, Turab
通讯作者：
Lookman, Turab
影响因子：
7.2
作者：
Bayca, Salih U.;Cansizoglu, Mehmet F.;Karabacak, Tansel
通讯作者：
Karabacak, Tansel
影响因子：
3.2
作者：
Krishnan, Gopi;Kooi, Bart J.;Dam, Bernard
通讯作者：
Dam, Bernard
影响因子：
3.8
作者：
He, Yuping;Zhao, Yiping
通讯作者：
Zhao, Yiping
影响因子：
64.8
作者：
Aurbach, D;Lu, Z;Levi, E
通讯作者：
Levi, E