Molecular dynamics study on the effect of chain branching on the physical properties of lipid bilayers: Structural stability

Article Abstract:

A comparison of the 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and 1,2-diphytanoyl-sn-glycero-3-phosphocholine (DPhPC) bilayers for the static and dynamic properties is made to study the effect of chain branching on bilayer stability. It is concluded that the higher the structural stability of the branched DPhPC bilayer is attributable to the slower conformational motion of the hydrophobic chain, which is clearly correlated with the observed chain entrapment between lateral neighboring lipid molecules.

Molecular dynamics, Lipid membranes, Properties

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Supramolecular assemblies between a new series of gemini-type amphiphiles and TPPS at the air/water interface: aggregation, chirality and Spacer effect

Article Abstract:

The supramolecular assemblies between a series of novel gemini amphiphiles (BisIm17Cn) and TPPS (tetrakis-(4-sulfornatophenyl)porphine) at the air/water interface are investigated. The J-aggregation of TPPS into gemini amphiphile monolayers and the chirality of the transferred nultilayer films are characterized by the pi-A isotherms, CD spectra, UV-vis spectroscopy and atomic force microscopy (AFM) measurements.

Thin films, Multilayered, Multilayered thin films

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STM observations of exchange dynamics at the solid-liquid interface using a molecular tracer

Article Abstract:

A molecular tracer experiment to observe exchange of molecules between phases at the solid-liquid interface is performed. The images are found to remain well defined despite continual replacement that indicates that each exchange is completed within a few milliseconds.

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