TY - JOUR

T1 - Dynamic surface properties of mixed monolayers of polystyrene micro- and nanoparticles with DPPC

AU - Bykov, A. G.

AU - Gochev, G.

AU - Loglio, G.

AU - Miller, R.

AU - Panda, A. K.

AU - Noskov, B. A.

N1 - Funding Information: The work was financially supported by the RFBR (project Nos. 15-53-45043 ???_? and 16-33-00255 ???_?), Grants of the President of RF (MK-6131.2016.3) and St. Petersburg State University (project No. 12.38.241.2014). Publisher Copyright: © 2016 Elsevier B.V. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2017/5/20

Y1 - 2017/5/20

N2 - The dynamic surface properties of mixed monolayers of 1,2-Dipalmitoyl-sn-glycerol-3-phosphocholine (DPPC) and negatively charged polystyrene particles (PS) of different size were investigated with the aim to model the interactions of particles with biointerfaces. Special attention was paid to the aggregation of the particles at the water/air interface. The particle aggregates have a weaker influence on the dynamic properties of DPPC monolayers as compared with non-aggregated particles because of a shorter three phase contact line. The incorporation of particles into a DPPC monolayer leads to disordering of the monolayer structure, decreases the changes of surface properties in the course of two-dimensional phase transitions and the dynamic surface elasticity of the condensed lipid film. The influence of particles on the properties of mixed monolayers depends strongly on the ratio of lipid molecules and particles, and decreases with the decrease of particle surface concentration. The Brewster angle microscopy gives direct evidence of the PS particle aggregation in the course of compression of mixed monolayers.

AB - The dynamic surface properties of mixed monolayers of 1,2-Dipalmitoyl-sn-glycerol-3-phosphocholine (DPPC) and negatively charged polystyrene particles (PS) of different size were investigated with the aim to model the interactions of particles with biointerfaces. Special attention was paid to the aggregation of the particles at the water/air interface. The particle aggregates have a weaker influence on the dynamic properties of DPPC monolayers as compared with non-aggregated particles because of a shorter three phase contact line. The incorporation of particles into a DPPC monolayer leads to disordering of the monolayer structure, decreases the changes of surface properties in the course of two-dimensional phase transitions and the dynamic surface elasticity of the condensed lipid film. The influence of particles on the properties of mixed monolayers depends strongly on the ratio of lipid molecules and particles, and decreases with the decrease of particle surface concentration. The Brewster angle microscopy gives direct evidence of the PS particle aggregation in the course of compression of mixed monolayers.

KW - DPPC

KW - Langmuir monolayers

KW - Nanoparticles

KW - Surface rheology

UR - http://www.scopus.com/inward/record.url?scp=85016418408&partnerID=8YFLogxK

U2 - 10.1016/j.colsurfa.2016.11.006

DO - 10.1016/j.colsurfa.2016.11.006

M3 - Article

VL - 521

SP - 239

EP - 246

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

SN - 0927-7757

ER -