Flexible Dielectric Resonator for Cell Stimulation on Curved Tissue
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Solution Overview
Problem
Existing piezoelectric-based resonators for cell stimulation are limited by their brittleness, low biocompatibility, and inflexibility, making them unsuitable for curved surfaces and prone to mechanical mismatch and immune reactions, which are not addressed by conventional piezoelectric materials like Lithium niobate, Lead zirconate titanate, and Zinc oxide.
Innovation Solution
A non-piezoelectric dielectric polymer substrate, such as Polyimide, Polyethylene terephthalate, or Polydimethylsiloxane, is used with an IDT thin film and insulating film to generate acoustic waves through polarization-induced mechanical deformation, allowing for flexible and transparent resonators that can attach to curved surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If piezoelectric elements (Lithium niobate, PZT, ZnO) are used as resonator substrates, then acoustic wave generation capability is achieved, but biocompatibility and flexibility deteriorate due to brittleness and inability to attach to curved tissues
Solution Approach 1:
The invention changes the fundamental material parameter from piezoelectric to dielectric, eliminating the need for brittle inorganic materials while maintaining acoustic wave generation capability through polarization-induced mechanical deformation. This parameter change enables the use of flexible, biocompatible polymer substrates.
Solution Approach 2:
The invention replaces the piezoelectric effect (coupling electrical and mechanical fields) with a dielectric-based mechanism where polarization-induced mechanical deformation generates acoustic waves. This substitution allows use of non-piezoelectric flexible polymers while achieving the same acoustic wave generation function.
2Power
If piezoelectric elements are used as resonator substrates, then acoustic wave generation capability is achieved, but flexibility and adaptability to curved surfaces deteriorate
Solution Approach 1:
The invention changes the material state from rigid inorganic piezoelectric ceramics to flexible organic dielectric polymers. This parameter change in material rigidity and flexibility enables the resonator to conform to curved tissue surfaces while maintaining acoustic wave generation through dielectric polarization mechanisms.
3Object-affected harmful factors
If PVDF piezoelectric polymer is used as resonator substrate, then biocompatibility and flexibility are improved, but electromechanical coupling efficiency deteriorates requiring additional processes and increasing costs
Solution Approach 1:
The invention replaces the piezoelectric mechanism with a dielectric-based polarization mechanism, eliminating the need for complex electret charging processes required in PVDF. This substitution simplifies manufacturing while maintaining flexibility and biocompatibility, as the dielectric polymer naturally exhibits polarization-induced mechanical deformation without requiring additional electromechanical coupling enhancement processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The resonators provide enhanced biocompatibility, flexibility, and transparency, minimizing inflammatory reactions and enabling real-time imaging while generating acoustic waves that promote cell migration and proliferation with reduced manufacturing costs.
Implementation Method 1
an electric field is formed across the substrate by an alternating current voltage applied between the IDT thin film and the ground thin film, and polarization of the substrate induced by the electric field causes mechanical deformation to generate an acoustic wave
Implementation Method 2
a resonator that can cause resonance at a specific frequency is required
Data Source
AI summary
An embodiment relates to a resonator that promotes cell division and migration by depositing an interdigitated electrode structure on a surface of a dielectric polymer substrate and generating an acoustic wave when an alternating current corresponding to a resonant frequency is applied.