Electrode Integrated Microsieve Assembly for Cell Detection
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Solution Overview
Problem
Conventional microsieve-based assays for pharmaceutical screening are costly and inefficient due to the high expense and limited re-usability of silicon microsieves with integrated thin-film electrodes, and the integration of electrodes on polymer-based microsieves is challenging, limiting progress in cell culture experiments and drug development.
Innovation Solution
A novel device comprising a detachably connected microsieve arrangement with oppositely arranged electrodes, where the microsieve is pluggable onto a reusable substrate with 3D electrodes, allowing for impedance measurements through a thick polymeric insulating layer without compromising detection efficiency, reducing the need for expensive silicon micromachining and enabling cost-effective, high-throughput cell culture monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If silicon microsieves with integrated thin-film electrodes are used, then cell detection and characterization capability is improved, but manufacturing cost and device complexity increase significantly
Solution Approach 1:
The device is divided into two separate components: a polymer microsieve arrangement (without electrodes) and a substrate with integrated electrodes. These components can be manufactured independently using optimized processes for each material system, then assembled together. This segmentation allows each component to be specialized and manufactured separately, reducing overall device complexity while maintaining detection capability.
Solution Approach 2:
The polymer microsieve and electrode substrate are merged into a functional assembly where the microsieve retains cells and the substrate provides detection capability. The microsieve arrangement is detachably connected to the substrate, creating a hybrid system that combines the advantages of polymer microsieves (ease of manufacture, biocompatibility) with electrode-based detection (measurement precision).
2Measurement precision
If silicon microsieves with thin-film electrodes are used, then cell detection capability is improved, but manufacturing cost increases
Solution Approach 1:
By separating the microsieve fabrication from electrode integration, each component can be manufactured using cost-optimized processes. Polymer microsieves can be fabricated using inexpensive molding techniques, while electrodes can be integrated using standard planar microelectrode array fabrication methods on the substrate, avoiding the need for expensive silicon micromachining and thin-film deposition on microsieve sidewalls.
Solution Approach 2:
The polymer microsieve arrangement can be manufactured as a disposable component at low cost, while the expensive electrode substrate is reused. This approach eliminates the need for rigorous cleaning and reusability of the microsieve itself, reducing manufacturing complexity and cost for high-throughput applications.
3Measurement precision
If thin-film sidewall electrodes are integrated on microsieves, then cell detection capability is improved, but re-usability decreases due to cleaning requirements
Solution Approach 1:
The device is segmented such that the electrode substrate serves as the reusable component while the polymer microsieve is disposable. Since the electrodes are integrated on the substrate rather than on the microsieve sidewalls, the substrate does not require rigorous cleaning between uses. The microsieve can be easily replaced without affecting the electrode array integrity.
Solution Approach 2:
The electrodes are extracted from the microsieve structure and placed on a separate substrate. This extraction allows the microsieve to be simplified to a passive cell-retaining structure that can be easily disposed of, while the expensive and sensitive electrode substrate is protected and reused across multiple experiments.
4Ease of manufacture
If polymer-based microsieves are used instead of silicon, then manufacturing cost decreases, but electrode integration becomes more challenging
Solution Approach 1:
The device architecture is segmented to separate polymer microsieve fabrication from electrode integration. The polymer microsieve is manufactured independently using cost-effective molding techniques, then assembled with a pre-fabricated electrode substrate. This avoids the technical challenge of integrating electrodes directly into polymer microsieves while maintaining low manufacturing cost.
Solution Approach 2:
The substrate acts as an intermediary component that bridges the polymer microsieve and the electrode array. The microsieve arrangement is detachably connected to the substrate, allowing electrical connections to be made through the substrate without requiring direct electrode integration into the polymer structure. This intermediary approach simplifies both microsieve fabrication and electrode integration.
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 device provides a cost-effective, reusable platform for detecting and characterizing cells by electrical properties, offering efficient cell tracking and positioning without the need for rigorous cleaning, enhancing pharmaceutical screening and fundamental research capabilities.
Implementation Method 1
each of the one or more pairs of oppositely arranged electrodes is configured to form an electric field in at least one micropore of the microsieve arrangement
Implementation Method 2
detecting and characterizing cells by electrical properties... impedance measurements through a thick polymeric insulating layer
Data Source
AI summary
The invention relates to a device for detecting and/or characterizing one or more cells by the electrical properties of the cells, the device comprising at least one electrode integrated microsieve assembly, wherein the assembly comprises a) a microsieve arrangement, such as a microsieve array, comprising one or more micropores for retaining the cells, and b) a substrate comprising one or more pairs of oppositely arranged first and second electrodes, wherein the microsieve arrangement is connected to the substrate such that each of the one or more pairs of electrodes is configured to form an electric field in at least one micropore of the microsieve arrangement, and wherein the first electrode is arranged in parallel to the second electrode.