Bioactive piezoelectric multilayer

Background

Biodegradable piezoelectric polymers are attractive for implants, biosensors and tissue engineering, but their shear piezoelectric response is limited. Because soft tissues and body-facing implants are exposed to deformation, improving shear piezoelectricity is important for effective sensing, stimulation and regenerative performance. Existing multilayer designs, however, typically use inert adhesive or electrode interlayers, which hinder direct electromechanical coupling between active layers and restrict biomedical integration.

Description of invention

We offer a biodegradable multilayer piezoelectric structure made of organic piezoelectric layers that are plasma-treated and directly bonded without adhesive interlayers. The structure is then activated by ultrasound, which induces coordinated deformation between layers and enhances shear piezoelectricity through electromechanical coupling. The technology can be implemented in implantable or non-implantable medical formats such as surgical meshes, biosensors, patches and electrostimulation devices.

Main advantages

•            Higher functional response: the multilayer architecture increases shear deformation and improves piezoelectric performance compared with single-layer organic piezoelectric materials.

•            No inert adhesive layer: direct plasma bonding preserves interlayer electromechanical interaction and avoids inactive interfaces that reduce coupling efficiency.

•            Biomedical versatility: biodegradable, soft and adaptable to meshes, patches and bioelectronic interfaces for regenerative and stimulation-related uses.