Nagao Michihiro, Bradbury Robert, Ansar Siyam M, Kitchens Christopher L
Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, USA.
Struct Dyn. 2020 Dec 15;7(6):065102. doi: 10.1063/4.0000041. eCollection 2020 Nov.
An oil-swollen surfactant membrane is employed to measure the effects of incorporated hydrophobically functionalized gold nanoparticles (AuNPs) on the structure and dynamics of the membranes. While maintaining an average AuNP diameter of approximately 5 nm, the membrane thickness was varied from 5 nm to 7.5 nm by changing the amount of oil in the membrane. The membranes become softer as the proportion of oil is increased, while the thickness fluctuations become slower. We attribute this to an increased fluctuation wavelength. Incorporation of AuNPs in the membrane induces membrane thinning and softening. Oil molecules surround the nanoparticles in the membrane and help their relatively homogeneous distribution. AuNPs significantly alter the membrane's structure and dynamics through thinning of the membrane, increased compressibility, and possible diffusion of AuNPs inside the membrane.
采用油溶胀表面活性剂膜来测量掺入的疏水功能化金纳米颗粒（AuNP）对膜结构和动力学的影响。在保持平均AuNP直径约为5nm的同时，通过改变膜中油的含量，使膜厚度从5nm变化到7.5nm。随着油比例的增加，膜变得更柔软，而厚度波动变得更慢。我们将此归因于波动波长的增加。在膜中掺入AuNP会导致膜变薄和软化。油分子在膜中包围纳米颗粒并有助于它们相对均匀地分布。AuNP通过使膜变薄、增加可压缩性以及AuNP在膜内可能的扩散，显著改变了膜的结构和动力学。
