Nie Zhihong, Fava Daniele, Kumacheva Eugenia, Zou Shan, Walker Gilbert C, Rubinstein Michael
Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada.
Nat Mater. 2007 Aug;6(8):609-14. doi: 10.1038/nmat1954. Epub 2007 Jul 8.
Organized arrays of anisotropic nanoparticles show electronic and optical properties that originate from the coupling of shape-dependent properties of the individual nanorods. The organization of nanorods in a controllable and predictable way provides a route to the fabrication of new materials and functional devices. So far, significant progress has been achieved in the self-assembly of nanorod arrays, yet the realization of a range of different structures requires changing the surface chemistry of the nanoparticles. We organized metal nanorods in structures with varying geometries by using a striking analogy between amphiphilic ABA triblock copolymers and the hydrophilic nanorods tethered with hydrophobic polymer chains at both ends. The self-assembly was tuneable and reversible and it was achieved solely by changing the solvent quality for the constituent blocks. This approach provides a new route to the organization of anisotropic nanoparticles by using the strategies that are established for the self-assembly of block copolymers.
各向异性纳米颗粒的有序阵列展现出源于单个纳米棒形状相关性质耦合的电子和光学性质。以可控且可预测的方式排列纳米棒为新型材料和功能器件的制造提供了一条途径。到目前为止，纳米棒阵列的自组装已取得显著进展，然而要实现一系列不同结构仍需要改变纳米颗粒的表面化学性质。我们通过利用两亲性ABA三嵌段共聚物与两端连接有疏水聚合物链的亲水性纳米棒之间的显著相似性，将金属纳米棒组装成具有不同几何形状的结构。这种自组装是可调谐且可逆的，仅通过改变组成嵌段的溶剂质量即可实现。该方法通过运用已确立的用于嵌段共聚物自组装的策略，为各向异性纳米颗粒的组装提供了一条新途径。
