Polyvinylidene difluoride (PVDF) is a ferroelectric polymer characterized by negative strain along the direction of applied electric field. However, electromechanical response mechanism PVDF remains unclear due to complexity hierarchical structure across length scales. As described in this letter, we employ Finsler geometry model as new solution aforementioned problem and demonstrate that defor...

A series of boron difluoride compounds with 2-(imidazo[1,5-a]pyridin-3-yl)phenols bearing alkylic chains at the 1-position has been synthesized and characterized both 1H 13C NMR infrared spectroscopy. This displayed blue emission in solution thin polymeric films, interesting features like large Stokes shifts good fluorescence quantum yields. Time-Dependent Density Functional Theory (TD-DFT) cal...

abstract wind erosion of soils and suspended particles in iran is one of the serious environmental and agricultural problems which affect agricultural lands, water reservoirs, irrigation canals, drains and etc. therefore wind erosion control needs attention specially in arid and semi-arid regions. although in recent years, some polymeric materials have been used for improvement of structural st...