Antimicrobial Surface With Interdigitated Electrodes for Biofilm Control
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Solution Overview
Problem
Current biofilm control methods are inefficient and unsustainable, as they require high energy input, pose safety concerns, and do not provide long-lasting antimicrobial and antifouling solutions for surfaces, especially in water distribution systems and medical devices.
Innovation Solution
A system comprising interdigitated electrodes with nanowedges and an insulative coating, powered by an external source to generate a controlled electric field, which inactivates microorganisms and prevents biofilm formation on surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrochemical reactions are used for bacteria inactivation, then bacteria inactivation is achieved, but bubbles are induced and unwanted byproducts are generated
Solution Approach 1:
The patent replaces electrochemical reactions with direct electric field application. The interdigitated electrodes generate an electric field that directly affects bacterial cells through electroporation and membrane disruption, eliminating the need for chemical reactions that produce bubbles and byproducts. This substitution of the underlying physical mechanism resolves the contradiction by achieving bacteria inactivation without the harmful side effects of electrochemical methods.
2Reliability
If strong electric fields are applied for electroporation, then bacteria inactivation is improved, but high energy input is required causing safety concerns
Solution Approach 1:
The interdigitated electrode structure creates highly localized electric fields concentrated at the electrode edges and between adjacent fingers. This local field enhancement allows effective bacteria inactivation in the immediate vicinity of the electrodes without requiring uniformly high energy input across the entire treatment area. The localized quality of the electric field resolves the contradiction by maintaining high efficacy where needed while reducing overall energy consumption.
Solution Approach 2:
The patent utilizes pulsed electric field application with controlled duration, amplitude, and frequency parameters. By optimizing these parameters, the system achieves effective electroporation and bacteria inactivation while minimizing total energy input. The ability to adjust and control field parameters allows the system to maintain efficacy while reducing safety concerns associated with continuous high-energy application.
3Object-affected harmful factors
If electrostatic repulsion is used for microbe adhesion mitigation, then microbe adhesion is reduced, but the solution is not sustainable and long-lasting
Solution Approach 1:
The electric field-based system provides continuous active antimicrobial protection as long as power is supplied, unlike passive electrostatic repulsion which degrades over time. The interdigitated electrodes can maintain a sustained electric field that continuously prevents microbial adhesion and inactivates organisms, ensuring long-lasting performance. This continuous action resolves the contradiction by maintaining effective microbe adhesion mitigation over extended periods.
Solution Approach 2:
The system inherently maintains its anti-biofouling performance through the continuous presence of the electric field, which actively prevents microbial accumulation without requiring periodic intervention or degradation of functional properties. The electrodes and insulative coating work together to maintain field integrity over time, providing self-sustaining protection that resolves the duration limitation of conventional electrostatic approaches.
4Reliability
If mechanical cleaning or chemical sterilization is used, then biofilm control is achieved, but intensive energy and fiduciary costs are incurred
Solution Approach 1:
The patent replaces mechanical cleaning and chemical sterilization with an electric field-based approach. The interdigitated electrodes generate electric fields that directly inactivate microorganisms and prevent biofilm formation through non-contact means, eliminating the intensive energy consumption associated with mechanical agitation, heating, or chemical application required by conventional methods. This substitution resolves the contradiction by achieving reliable biofilm control with significantly reduced energy and operational costs.
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 system effectively inactivates microorganisms and prevents biofilm formation with reduced energy consumption and enhanced safety, providing a sustainable and efficient antimicrobial surface solution.
Implementation Method 1
The plurality of electrodes can be configured to produce an electric field on at least a portion of the substrate sufficient to achieve an antimicrobial or antifouling result
Data Source
AI summary
An exemplary embodiment of the present disclosure provides a system for microorganism and/or biofilm inactivation that can comprise an antimicrobial surface. The antimicrobial surface can comprise a plurality of electrodes arranged in a predetermined pattern. The antimicrobial surface can include an insulative material which can coat at least a portion of each of the plurality of electrodes. The antimicrobial surface can include an external power source that can be configured to supply electrical power to the plurality of electrodes to at least in part induce the electric field via the plurality of electrodes.