Self-assembly of self-limiting monodisperse supraparticles from polydisperse nanoparticles
Self-assembly of self-limiting monodisperse supraparticles from polydisperse nanoparticles
复制标题
多分散纳米颗粒自组装自限性单分散超颗粒
DOI：
10.1038/nnano.2011.121
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发表时间：
2011-09-01
影响因子：
38.3
通讯作者：
Kotov, Nicholas A.
中科院分区：
文献类型：
--
作者：
Xia, Yunsheng;Trung Dac Nguyen;Kotov, Nicholas A.
已知纳米颗粒通过生长过程自组装成更大的结构，该生长过程通常连续发生并且取决于单个纳米颗粒的均匀性。在这里，我们表明，无机纳米粒子与非均匀的尺寸分布可以自发地组装成均匀尺寸的超粒子与核壳形态。这种自限制生长过程由静电排斥和货车范德华吸引力之间的平衡控制，这是由纳米颗粒的广泛多分散性辅助的。相互作用的一般性质在组成纳米颗粒的组成、尺寸和形状上产生灵活性，并导致大家族的自组装结构，包括分层组织的胶体晶体。
Nanoparticles are known to self-assemble into larger structures through growth processes that typically occur continuously and depend on the uniformity of the individual nanoparticles. Here, we show that inorganic nanoparticles with non-uniform size distributions can spontaneously assemble into uniformly sized supraparticles with core-shell morphologies. This self-limiting growth process is governed by a balance between electrostatic repulsion and van der Waals attraction, which is aided by the broad polydispersity of the nanoparticles. The generic nature of the interactions creates flexibility in the composition, size and shape of the constituent nanoparticles, and leads to a large family of self-assembled structures, including hierarchically organized colloidal crystals.