A5007964700- Advanced Sensor and Energy Harvesting Materials
- Dielectric materials and actuators
- Advanced Materials and Mechanics
- Ferroelectric and Piezoelectric Materials
- Conducting polymers and applications
- Additive Manufacturing and 3D Printing Technologies
- Soft Robotics and Applications
CEA LITEN
2022-2025
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2024-2025
Université Grenoble Alpes
2024-2025
Abstract Polyvinylidene fluoride‐trifluoroethylene (P(VDF‐TrFE)) exhibits outstanding electromechanical properties and is a material of choice for non‐volatile memories, energy‐harvesting systems, multifunctional actuators, sensors. However, this polymer remains one the least understood materials among ferroelectric due to its semi‐crystalline structure with chains folding in elongated grains through lamellae amorphous regions. Here, operando high‐resolution X‐ray diffraction exploited...
To treat cardiovascular diseases (i.e., a major cause of mortality after cancers), endovascular-technique-based guidewire has been employed for intra-arterial navigation. date, most commercially available guidewires (e.g., Terumo, Abbott, Cordis, etc.) are non-steerable, which is poorly suited to the human arterial system with numerous bifurcations and angulations. reach target artery, surgeons frequently opt several tools (guidewires different size integrated into angulated catheters) that...
The incorporation of lead-free BaTiO 3 particles into P(VDF-TrFE) provides a versatile way for tuning dielectric and piezoelectric properties.Screen-printing enables the easy production flexible capacitors.To prevent particle aggregation, are functionalized with surfactant.Initially, 60 % vol.BaTiO deposited in second layer out three layers.After annealing cooling, distribution is successfully homogeneous whole film.After poling at 80 • C, relative permittivity coefficient d 33 significantly...
The miniaturization of bending actuators is valuable for robotics, embedded systems, and medical applications, but often results in performance loss. This study presents a multilayered, screen‐printed PVDF‐TrFE (polyvinyledenedifluoride‐trifluoroethylene) actuator less than one millimeter wide, designed to achieve large angles. To this, the various causes loss are first identified through cross‐sectional study: all influencing parameters studied, from geometry morphology. geometrical profile...
Abstract The use of high electric fields, as well pre‐stressing, are the two main obstacles to widespread poly(vinylidene fluoride (PVDF)‐based actuators. In response, a new double‐sided multilayer device has been developed which, coupled with polarization procedure, enables bending performance at low voltages. actuator's symmetry allows zero rest, while number layers strong field be maintained reducing applied voltage. X‐ray and permittivity studies reveal ultimate links between microscopic...