Publication
High diffusion barrier and piezoelectric nanocomposites based on polyvinylidene fluoride-trifluoroethylene copolymer and hydrophobized clay
Publications associées (32)
Piezoelectric Properties of BiFeO3 Exposed to High Temperatures
Dragan Damjanovic, Xiaolong Li
BiFeO3 is a ferroelectric with a Curie temperature of 830 C-degrees, however, its piezoelectric performance at high temperature remains unclear. The current work reveals a disappearance/recovery of piezoelectricity in BiFeO3 at elevated temperature and upo ...
Weinheim2024Tailor-made Piezoelectric Elastomer Materials
Recent advancements in miniature devices with higher computational capabilities and ultralow power consumption have accelerated the development of wearable sensors, actuators, and energy harvesters everywhere. The ultimate aim of such a technological revol ...
EPFL2023Ferroelectric Effects Probed by in situ Transmission Electron Microscopy
Ferroelectric perovskite oxides are widely used in sensors, actuators and optical modulators and, at the same time, they show promise for implementation in future applications such as energy storage, memory and cooling devices. At the infancy of the discov ...
EPFL2022Functional and Responsive Polymers via Controlled Radical Polymerization
This Thesis is built around 4 topics, which share in common that they all take advantage of the assets of controlled radical polymerization to either (i) prepare well-defined model systems to address fundamental research questions with regard to the sensit ...
EPFL2020Dielectric Actuation Techniques at the Nanoscale: Piezoelectricity and Flexoelectricity
Micro- and nanoelectromechanical systems (MEMS/NEMS) have long shown their potential to disrupt the established technologies. Over the past 15 years, MEMS have become fundamental components in filters, accelerometers, gyroscopes and gas sensors. MEMS are n ...
EPFL2019Origins of the macroscopic symmetry breaking in centrosymmetric phases of perovskite oxides
Many perovskite materials experience a temperature-driven phase transition at the Curie temperature from a non-centrosymmetric polar ferroelectric phase to a paraelectric phase, where polarization is lost. The paraelectric phase is usually centrosymmetric ...
EPFL2017Piezoelectric response of BiFeO3 ceramics at elevated temperatures
The high Curie temperature (T-C similar to 825 degrees C) of BiFeO3 has made this material potentially attractive for the development of high-T-C piezoelectric ceramics. Despite significant advances in the search of new BiFeO3-based compositions, the piezo ...
American Institute of Physics2016Piezoelectric enhancement under negative pressure
Nava Setter, Alexander Tagantsev, Tomas Sluka, Alexander Kvasov, Silviu Cosmin Sandu, Jin Wang
Enhancement of ferroelectric properties, both spontaneous polarization and Curie temperature under negative pressure had been predicted in the past from first principles and recently confirmed experimentally. In contrast, piezoelectric properties are expec ...
Nature Publishing Group2016In-situ structural investigations of ferroelasticity in soft and hard rhombohedral and tetragonal PZT
Despite the technological importance of hard and soft PZT, Pb(Zr,Ti)O3, ceramics, the mechanisms of ferroelectric hardening and softening remain widely discussed in the literature. The hardening and softening phenomena have traditionally been investigated ...
American Institute of Physics2015Effect of interfacial interactions on the electromechanical response of poly(vinylidene fluoride-trifluoroethylene)/BaTiO3 composites and its time dependence after poling
Véronique Michaud, Yves Leterrier, Dragan Damjanovic, Sara Dalle Vacche
Solvent cast and compression molded composite films based on poly(vinylidene fluoride-trifluoroethylene), containing pristine and silylated BaTiO3 particles, were poled, and their electromechanical response (d(33)), their dielectric properties, and the cry ...
Elsevier2015