Flexible Biosensor Electrode Segmentation for Sweat Ion Detection

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Solution Overview

Problem

Existing technologies fail to effectively detect sodium and potassium ions in sweat during exercise, which are crucial for health monitoring of athletes and ordinary individuals.

Innovation Solution

A biological detection apparatus featuring a flexible substrate with a biosensor that includes a microelectrode structure with a first insulating layer and electrode layer, optionally with protrusions and sensitive functional layers, designed to detect ion concentrations in sweat.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional detection methods are used, then device simplicity is maintained, but detection precision of ion concentrations in sweat is insufficient

Engineering Contradiction:

Improvedetection accuracy of ion concentrationsVSAvoidbiosensor structure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The biosensor is divided into multiple independent working electrode regions (first, second, third working electrode regions) and reference electrode regions, each capable of detecting different ion concentrations. This segmentation allows simultaneous multi-parameter detection while maintaining a relatively simple overall structure that can be integrated on a single substrate.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different electrode regions are assigned specific functions: working electrode regions are configured with specific potentials for detecting different ions (Na+, K+, Ca2+), while reference electrode regions provide stable reference potentials. This local functional differentiation enables precise multi-ion detection without requiring complex external instrumentation.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If multiple ion detection capabilities are added, then adaptability for health monitoring is improved, but device complexity increases

Engineering Contradiction:

Improvemulti-ion detection capabilityVSAvoidelectrode structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The biosensor substrate integrates multiple working electrode regions and reference electrode regions that can simultaneously detect different ion concentrations (sodium, potassium, calcium) in sweat. This multi-functional design allows a single device to provide comprehensive electrolyte monitoring for health assessment, replacing the need for multiple separate detection devices.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Enhances detection accuracy and efficiency of sodium, potassium, and other ion concentrations in sweat, providing valuable health guidance for users.

Implementation Method 1

a biosensor provided on the flexible substrate and configured to obtain substance information of a living body

Methodology Applied

Scientific EffectElectrochemical detection: Conduction (electrical)

Data Source

PatentUS12402817B2Biological detection apparatuses, systems and methods

Publication Date: 2025.09.02 BEIJING BOE TECH DEV CO LTD

AI summary

Biological detection apparatuses, systems and methods are provided. A biological detection apparatus may include a flexible substrate and a biosensor. The biosensor is provided on the flexible substrate and configured to obtain substance information of a living body.