Department of Polymer Science and Engineering, University of Massachusetts , Amherst, Massachusetts 01003, United States.
ACS Nano. 2017 Feb 28;11(2):1292-1300. doi: 10.1021/acsnano.6b05563. Epub 2017 Jan 20.
We report the results of cross-linking of two-dimensional gold nanoparticle (Au-NP) assemblies at the air-water interface in situ. We introduce an aqueous soluble ruthenium benzylidene catalyst into the water subphase to generate a robust, elastic two-dimensional network of nanoparticles containing cyclic olefins in their ligand framework. The most striking feature of the cross-linked Au-NP assemblies is that the extended connectivity of the nanoparticles enables the film to preserve much of its integrity under compression and expansion, features that are absent in its non-cross-linked counterparts. The cross-linking process appears to "stitch" the nanoparticle crystalline domains together, allowing the cross-linked monolayers to behave like a piece of fabric under lateral compression.
我们报告了在空气-水界面原位交联二维金纳米粒子（Au-NP）组装体的结果。我们将一种水溶性钌苄叉催化剂引入水亚相中，以在配体框架中生成含有环烯烃的坚固、有弹性的二维纳米粒子网络。交联 Au-NP 组装体最显著的特征是纳米粒子的扩展连接性使薄膜在压缩和膨胀时能够保持大部分完整性，而其非交联对应物则没有这些特征。交联过程似乎将纳米粒子的晶畴“缝合”在一起，使交联的单层在横向压缩下表现得像一块织物。
