Microporous Polymer Biosensor Electrode for Tissue-Integrated Stability

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Solution Overview

Problem

Existing electrochemical analyte biosensors face challenges such as lack of biocompatibility, mechanical, chemical, or electrochemical stability, and short lifespan, leading to inaccurate or delayed readings.

Innovation Solution

The development of an electrochemical analyte biosensor with a biocompatible electrode composite comprising a microporous polymer substrate and a conductive material, including a conformal metal coating or nanoporous metal imbibed into the substrate, supports tissue integration and includes an immobilized bioreceptor region for improved stability and accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional electrochemical analyte biosensors are used, then analyte detection is achieved, but biocompatibility and stability are insufficient leading to short lifespan

Engineering Contradiction:

Improvebiosensor stability and lifespanVSAvoidlack of biocompatibility and degradation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent employs a composite electrode structure consisting of a microporous polymer substrate (such as ePTFE) combined with conformal metal coatings or nanoporous metal imbibed within the pores. This composite material approach integrates the biocompatibility and mechanical stability of the polymer substrate with the electrical conductivity and catalytic properties of the metal components, thereby achieving enhanced overall reliability and resistance to degradation while maintaining long-term stability in biological environments.

Inventive Principle:

Principle #40Composite materials

2Stability of the object's composition

If conventional electrode structures are used, then basic detection function is provided, but mechanical and electrochemical stability are insufficient

Engineering Contradiction:

Improveelectrochemical and mechanical stabilityVSAvoiddetection accuracy over time

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The patent utilizes a microporous polymer substrate with controlled pore sizes and interconnected pore structures. This porous architecture provides mechanical stability while allowing efficient analyte transport to the electrode surface. The porous structure also enables the incorporation of conductive materials within the pores, enhancing electrochemical stability and maintaining consistent detection accuracy over extended periods through improved structural integrity and resistance to fouling.

Inventive Principle:

Principle #31Porous materials

3Ease of manufacture

If simple electrode coatings are applied, then manufacturing is easier, but tissue integration and stability are compromised

Engineering Contradiction:

Improvecoating application simplicityVSAvoidtissue integration capability

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent implements a nested structure where nanoporous metal materials are imbibed within the micropores of the polymer substrate, creating a hierarchical composite architecture. The polymer substrate forms the outer matrix that provides mechanical support and biocompatibility, while the metal phase is nested within the pores to provide conductivity and catalytic activity. This nested configuration can be achieved through straightforward manufacturing processes such as dip-coating or infiltration, yet delivers superior tissue integration and long-term stability.

Inventive Principle:

Principle #7Nested doll (Nesting)

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 biosensor exhibits enhanced biocompatibility, stability, and resistance to degradation, promoting tissue integration and longer lifespan with accurate and reliable analyte detection.

Implementation Method 1

electrochemical analyte biosensors may be used to measure a wide variety of target analytes

Methodology Applied

Scientific EffectElectrochemical detection:

Implementation Method 2

The microporous polymer substrate may support tissue integration and/or tissue ingrowth in certain applications

Methodology Applied

Scientific EffectTissue integration:

Data Source

PatentUS12517119B2Electrochemical analyte biosensors, associated compositions of matter, and methods for making and using same

Publication Date: 2026.01.06 WL GORE & ASSOC INC

AI summary

An electrochemical analyte biosensor is configured to detect an analyte. The electrochemical analyte biosensor includes a biocompatible electrode composite with a microporous polymer substrate having a plurality of interconnected pores, an electrically conductive region serving as a working electrode and including a conductive material contained at least partially in the interconnected pores of the microporous polymer substrate, and at least one immobilized bioreceptor region adjacent to the electrically conductive region. The conductive material may include a conformal metal coating on the microporous polymer substrate or a nanoporous metal imbibed into the microporous polymer substrate. The microporous polymer substrate may support tissue integration and/or tissue ingrowth in certain applications. The electrochemical analyte biosensor may be used in medical, industrial, agricultural, environmental, and other applications.