Zhang Xinyi, Lu Wei, Dai Jiyan, Bourgeois Laure, Yao Jianfeng, Wang Huanting, Friend James R, Zhao Dongyuan, MacFarlane Douglas R
School of Chemistry, Monash University, Clayton, VIC3800, Australia.
Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P.R. China.
Sci Rep. 2014 Dec 11;4:7420. doi: 10.1038/srep07420.
The synthesis of metal frameworks perforated with nanotunnels is a challenge because metals have high surface energies that favor low surface area structures; traditional liquid-crystal templating techniques cannot achieve the synthetic control required. We report a synthetic strategy to fabricate metal nanomaterials with highly ordered, tunable mesostructures in confined systems based on a new quasi-hard-templating liquid-crystals mechanism. The resulting platinum nanowires exhibit long range two-dimensional hexagonally ordered mesopore structures. In addition, single crystalline hexagonal mesoporous platinum nanowires with dominant {110} facets have been synthesized. Finally, we demonstrate that the mesostructures of metal nanomaterials can be tuned from hexagonal to lamellar mesostructures.
合成带有纳米隧道的金属框架是一项挑战，因为金属具有较高的表面能，这有利于形成低表面积结构；传统的液晶模板技术无法实现所需的合成控制。我们报告了一种基于新的准硬模板液晶机制在受限系统中制备具有高度有序、可调介观结构的金属纳米材料的合成策略。所得的铂纳米线呈现出长程二维六方有序介孔结构。此外，还合成了具有主导{110}晶面的单晶六方介孔铂纳米线。最后，我们证明了金属纳米材料的介观结构可以从六方结构调谐为层状介观结构。
