A general route to nanocrystal kebabs periodically assembled on stretched flexible polymer shish.
A general route to nanocrystal kebabs periodically assembled on stretched flexible polymer shish.
复制标题
在拉伸柔性聚合物烤盘上定期组装纳米晶体烤肉串的一般途径
DOI：
10.1126/sciadv.1500025
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发表时间：
2015-03
期刊：
影响因子：
13.6
通讯作者：
Lin Z
中科院分区：
文献类型：
--
作者：
Xu H;Xu Y;Pang X;He Y;Jung J;Xia H;Lin Z
利用无机纳米晶体的受限合成方法制备了有机-无机一维周期性项链状纳米结构。将纳米颗粒组装成具有精确控制的尺寸和形状的一维（1D）纳米结构，使得探索新的特性和构建1D小型化器件成为可能。这种纳米结构的物理性质在很大程度上取决于纳米颗粒成分的尺寸、化学组成和表面化学，以及1D纳米结构内相邻纳米颗粒的紧密接近度。化学合成提供了一种有趣的替代方法，可以在材料多样性，尺寸可控性，形状规则性和低成本生产方面创建由自组装纳米颗粒组成的1D纳米结构。然而，这是一个进展较慢的领域。我们报告了一个非常规的，但一般的策略，工艺一个令人兴奋的各种一维纳米nanonecklace-like纳米结构，包括均匀的功能nanodisces定期组装沿着拉伸的柔性聚合物链，通过利用明智地设计的两亲性蠕虫状二嵌段共聚物作为nanoreactors。这些纳米结构可以被视为有机-无机串，其中纳米盘串周期性地位于拉伸的聚合物串上。基于自洽场理论的模拟表明，有机-无机shish-kebabs的形成是由高度拉伸的聚合物链上约束的自组装细长星形二嵌段共聚物成分引导的。
Organic-inorganic 1D periodic necklace-like nanostructures are fabricated using confined synthesis of inorganic nanocrystals. Assembling nanoparticles into one-dimensional (1D) nanostructures with precisely controlled size and shape renders the exploration of new properties and construction of 1D miniaturized devices possible. The physical properties of such nanostructures depend heavily on the size, chemical composition, and surface chemistry of nanoparticle constituents, as well as the close proximity of adjacent nanoparticles within the 1D nanostructure. Chemical synthesis provides an intriguing alternative means of creating 1D nanostructures composed of self-assembled nanoparticles in terms of material diversity, size controllability, shape regularity, and low-cost production. However, this is an area where progress has been slower. We report an unconventional yet general strategy to craft an exciting variety of 1D nanonecklace-like nanostructures comprising uniform functional nanodiscs periodically assembled along a stretched flexible polymer chain by capitalizing on judiciously designed amphiphilic worm-like diblock copolymers as nanoreactors. These nanostructures can be regarded as organic-inorganic shish-kebabs, in which nanodisc kebabs are periodically situated on a stretched polymer shish. Simulations based on self-consistent field theory reveal that the formation of organic-inorganic shish-kebabs is guided by the self-assembled elongated star-like diblock copolymer constituents constrained on the highly stretched polymer chain.