Transparent Actuator Substrate for Cell Stimulation
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Solution Overview
Problem
Existing actuator substrates for biological cell cultivation are difficult to produce in high throughput using industrial methods, lack transparency for microscopy, and cannot generate complex mechanical stimuli like standing wave vibrations.
Innovation Solution
An actuator substrate with an upper and lower electrode and an electroactive polymer (EAP) layer between them, where the electrodes protrude to serve as contact points for a voltage source, allowing for variable electric field exposure and vibration, and are made from biocompatible and transparent materials for safe and observable cell culture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex composite materials with magnetoactive or electroactive particles are used to enable mechanical stimulation of cells, then the ability to generate deformations and vibrations is improved, but the manufacturing complexity and device structure become too complex for industrial high-throughput production
Solution Approach 1:
The patent extracts the active functional component (electroactive polymer layer) from the complex composite material system and places it between simple transparent electrodes. This separates the stimulation function from the structural complexity, allowing industrial manufacturing while maintaining cell stimulation capability.
Solution Approach 2:
The patent replaces complex magnetoactive or electroactive composite materials with a simpler electroactive polymer system that can be manufactured using standard transparent substrate and electrode deposition techniques, enabling high-throughput production.
2Adaptability or versatility
If external magnetic or electric fields are applied to control composite material deformations, then mechanical stimulation of cells is achieved, but the system cannot generate standing wave vibrations with more than two nodes
Solution Approach 1:
The patent segments the electrode into multiple independent transparent electrode layers that can be individually controlled. This allows generation of complex voltage patterns across the substrate, enabling standing wave vibrations with multiple nodes that cannot be achieved with single-field approaches.
Solution Approach 2:
The patent uses dynamically controllable transparent electrodes that can independently vary voltage in space and time, enabling real-time generation of complex vibration patterns including standing waves with multiple nodes, unlike static field applications.
3Adaptability or versatility
If opaque composite materials are used for actuator substrates, then mechanical stimulation function is achieved, but the cell tissue cannot be examined using classical light microscopy methods
Solution Approach 1:
The patent extracts the mechanical actuation function into a separate electroactive polymer layer while using transparent electrodes and substrate, allowing light transmission for microscopy observation while maintaining actuation capability.
Solution Approach 2:
The patent uses transparent or optically clear materials for electrodes and substrate, changing the optical properties from opaque to transparent, enabling simultaneous mechanical actuation and optical observation of cell cultures.
4Ease of operation
If piezoelectric elements are placed in an airtight chamber to stimulate cell growth, then mechanical vibration transmission is achieved, but the device cannot be mass-produced in an automated process
Solution Approach 1:
The patent removes the airtight chamber enclosure and directly integrates the electroactive polymer layer between transparent electrodes on a solid support, eliminating complex sealing requirements and enabling automated manufacturing while maintaining vibration transmission to cell cultures.
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
Enables cost-effective, high-throughput production of actuator substrates that can elastically deform, vibrate, or oscillate, facilitating targeted cell stimulation and allowing for real-time monitoring of cell tissue growth using light microscopy.
Implementation Method 1
The actuator substrate (10) comprises at least one actuator unit with an upper electrode (2) and a lower electrode (1), as well as an actuator element (3) arranged between the two electrodes and directly adjacent to the upper and lower electrodes, which consists of at least one layer of at least one electroactive polymer (EAP)
Implementation Method 2
the actuator substrate should be designed to oscillate, vibrate, or deform elastically as desired, and thus be used for the targeted stimulation of cell cultures
Data Source
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AI summary
The present invention relates to an actuator substrate comprising an upper electrode and a lower electrode, as well as an actuator element arranged between the two electrodes and directly adjacent to the upper and lower electrodes. The invention further relates to the use of such an actuator substrate for cultivating biological cells and to a method for its production.