Ren Long, Cheng Ningyan, Man Xingkun, Qi Dongchen, Liu Yundan, Xu Guobao, Cui Dandan, Liu Nana, Zhong Jianxin, Peleckis Germanas, Xu Xun, Dou Shi Xue, Du Yi
Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM), University of Wollongong, Wollongong, NSW, 2500, Australia.
BUAA-UOW Joint Research Centre, and School of Physics, Beihang University, Beijing, 100091, China.
Adv Mater. 2021 Mar;33(11):e2008024. doi: 10.1002/adma.202008024. Epub 2021 Feb 1.
Core-shell and hollow nanostructures have been receiving significant interest due to their potential in wide scientific and technological fields. Given such large scope, however, they still lag far behind in terms of the ambition toward controllably, or even programmatically, synthesizing libraries of core-shell structures on a large scale. Here, a general route for the programmable preparation of complex core-shell nanostructures by using liquid metal (LM) droplets as reformable templates is presented, and the triggering of a localized galvanic replacement reaction in one ultrasonication system is demonstrated. Benefiting from the activity and mobility of the metal components in LM templates, high-level compositional diversity control and quantitative regulation of both the core and the shell layers of the heterogeneous products are achieved, which cannot be realized with a solid-template synthetic route.
核壳和中空纳米结构因其在广泛科学技术领域的潜力而备受关注。然而，鉴于如此广阔的应用范围，它们在大规模可控甚至可编程合成核壳结构库的目标方面仍远远落后。在此，提出了一种以液态金属（LM）液滴为可重构模板可编程制备复杂核壳纳米结构的通用方法，并展示了在一个超声系统中引发局部电置换反应。受益于LM模板中金属成分的活性和流动性，实现了对异质产物核层和壳层的高水平成分多样性控制和定量调节，这是固体模板合成路线无法实现的。
