NSF/UNM Center for Micro-Engineered Materials, Department of Chemical and Nuclear Engineering, The University of New Mexico, Albuquerque, New Mexico 87131, USA.
J Am Chem Soc. 2011 Aug 3;133(30):11410-3. doi: 10.1021/ja202446t. Epub 2011 Jul 6.
Transformation of 2D Au nanoparticle (NP) arrays into large scale, ordered, and oriented nanorod/nanowire arrays supported on a transferrable polymer film has been accomplished. E-beam irradiation followed by room temperature aging of a suspended Au NP/polymethylmethacrylate (PMMA) polymer close packed monolayer results in one-dimensional nanoparticle aggregation, reorientation, and sintering into a high density array of oriented Au nanowires with coherent single-crystal-like interfaces. Molecular dynamics simulations of alkane-thiol capped Au NPs, interacting through the Vincent potential and undergoing 2D Poisson compression, account semiquantitatively for the qualitative features of the transformation. This fabrication approach should be extendable to directing 1D aggregation of highly anisotropic nanostructures in arbitrary NP systems.
已成功将二维金纳米粒子（NP）阵列转化为在可转移聚合物膜上的大规模、有序和定向的纳米棒/纳米线阵列。通过在悬浮的 Au NP/聚甲基丙烯酸甲酯（PMMA）聚合物紧密堆积单层上进行电子束辐照，然后在室温下老化，导致一维纳米粒子聚集、重新定向和烧结成具有相干单晶状界面的高密度定向金纳米线阵列。通过 Vincent 势相互作用并经历 2D Poisson 压缩的烷烃-硫醇封端 Au NPs 的分子动力学模拟，半定量地解释了转变的定性特征。这种制造方法应该可以扩展到指导任意 NP 系统中具有各向异性的纳米结构的一维聚集。
