Two-Dimensional DPPC Based Emulsion-like Structures Stabilized by Silica Nanoparticles
作者： Eduardo Guzmán , Davide Orsi , Luigi Cristofolini , Libero Liggieri , Francesca Ravera
DOI: 10.1021/LA502183T
关键词: Phase (matter) 、 Crystallography 、 Monolayer 、 Colloidal silica 、 Dispersion (chemistry) 、 Scanning electron microscope 、 Materials science 、 Surface layer 、 Pickering emulsion 、 Langmuir 、 Chemical engineering
摘要: We studied the mechanical and structural properties of mixed surface layers composed by 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) silica nanoparticles (NPs). These are obtained spreading a DPPC Langmuir monolayer on colloidal dispersion. The transfer/incorporation NPs into monolayer, driven electrostatic interactions, alters molecular orientation, mechanisms domain formation, consequently phase behavior layer during compression. investigation these systems means complementary techniques (Langmuir trough, fluorescence microscopy, ellipsometry, scanning electron microscopy (SEM)) shows that incorporated preferentially distribute along liquid expanded DPPC. assumes stable homogeneous bidimensional structure two-dimensional (2D) analogue Pickering emulsion. In fact, presence particles provides circular shape to domains stabilizes them against ...
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