Small-molecule-directed nanoparticle assembly towards stimuli-responsive nanocomposites.
Small-molecule-directed nanoparticle assembly towards stimuli-responsive nanocomposites.
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DOI：
10.1038/nmat2565
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发表时间：
2009-12
期刊：
影响因子：
41.2
通讯作者：
Yue Zhao;K. Thorkelsson;Alexander J. Mastroianni;T. Schilling;J. Luther;Benjamin J. Rancatore;Kazuyuki Mats
中科院分区：
文献类型：
--
作者：
Yue Zhao;K. Thorkelsson;Alexander J. Mastroianni;T. Schilling;J. Luther;Benjamin J. Rancatore;Kazuyuki Mats
在多个长度尺度上精确控制纳米结构单元（如纳米颗粒）的空间组织是“自下而上”生成技术上重要的材料的瓶颈。只有几种方法已被证明可以在没有表面改性的情况下实现纳米颗粒组装体。我们展示了一种简单而通用的方法，通过结合小分子和嵌段共聚物来产生容易获得的纳米颗粒的刺激响应性分层组装。纳米颗粒组织成一维，二维和三维阵列与受控的粒子间的分离和排序，实现没有化学改性的纳米颗粒或嵌段共聚物。纳米复合材料对热和光的响应被证明，其中纳米颗粒的空间分布可以通过暴露于热或光或改变局部环境而变化。所描述的方法适用于广泛的纳米颗粒，并与现有的制造工艺兼容，从而实现了用于生成功能器件的非破坏性方法。
Precise control of the spatial organization of nanoscopic building blocks, such as nanoparticles, over multiple length scales is a bottleneck in the ‘bottom-up’ generation of technologically important materials. Only a few approaches have been shown to achieve nanoparticle assemblies without surface modification. We demonstrate a simple yet versatile approach to produce stimuli-responsive hierarchical assemblies of readily available nanoparticles by combining small molecules and block copolymers. Organization of nanoparticles into one-, two- and three-dimensional arrays with controlled inter-particle separation and ordering is achieved without chemical modification of either the nanoparticles or block copolymers. Nanocomposites responsive to heat and light are demonstrated, where the spatial distribution of the nanoparticles can be varied by exposure to heat or light or changing the local environment. The approach described is applicable to a wide range of nanoparticles and compatible with existing fabrication processes, thereby enabling a non-disruptive approach for the generation of functional devices.