Condensation of Silica Nanoparticles on a Phospholipid Membrane

Abstract

The structure of the transient layer at the interface between air and the aqueous solution of silica nanoparticles with the size distribution of particles that has been determined from small-angle scattering has been studied by the X-ray reflectometry method. The reconstructed depth profile of the polarizability of the substance indicates the presence of a structure consisting of several layers of nanoparticles with the thickness that is more than twice as large as the thickness of the previously described structure. The adsorption of 1,2-distearoyl-sn-glycero-3-phosphocholine molecules at the hydrosol/air interface is accompanied by the condensation of anion silica nanoparticles at the interface. This phenomenon can be qualitatively explained by the formation of the positive surface potential due to the penetration and accumulation of Na+ cations in the phospholipid membrane.

7 pages, 5 figures

References in corpus (1)

• Compact Layer of Alkali Ions at the Surface of Colloidal Silica

Cited by in corpus (6)

• Kinetics of the Phospholipid Multilayer Formation at the Surface of the Silica Sol
• Study of DMPS Monolayers on a Water Substrate with Laboratory X-ray Reflectometer
• On the Formation of a Macroscopically Flat Phospholipid Membrane on a Hydrosol Substrate
• Laboratory X-ray Study of the Phospholipid Monolayers at the Water Surface
• Modelless X-Ray Scattering Study of a Silica Hydrosol Surface
• Prospects for the Use of Laboratory Sources for X-ray Reflectometry of Thin Films on a Liquid Surface