Biosensor Electrode with Embedded Carbon Nanotubes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Nanoporous metal structures used in biosensor electrodes are fragile and have low conductivity, which limits their sensitivity and working life.
Innovation Solution
A three-dimensional porous composite structure is developed, incorporating carbon nanotubes embedded in a metal ligament network, with nano-oxides or metal particles for enhanced catalytic properties, improving mechanical strength, conductivity, and stability, and increasing the specific surface area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If nanoporous metal structure is used for the electrode, then sensitivity is improved due to large specific surface area, but mechanical strength deteriorates and conductivity is low
Solution Approach 1:
The patent applies composite materials by combining nanoporous metal structure with carbon nanotubes and conductive polymers. The carbon nanotubes provide mechanical strength and structural support to the fragile nanoporous metal, while the conductive polymer matrix enhances overall conductivity. This composite approach allows the electrode to maintain large specific surface area for sensitivity while gaining mechanical strength and improved electrical conductivity from the combined materials.
2Measurement precision
If nanoporous metal structure is used for the electrode, then sensitivity is improved due to large specific surface area, but conductivity deteriorates
Solution Approach 1:
The patent uses composite materials combining nanoporous metal with conductive polymers and carbon nanotubes. The conductive polymer matrix provides continuous conductive pathways throughout the structure, while carbon nanotubes act as conductive bridges between metal particles. This composite system maintains the large specific surface area of nanoporous metal for high sensitivity while ensuring adequate electrical conductivity through the polymer and carbon nanotube network.
3Measurement precision
If nanoporous metal structure is used for the electrode, then sensitivity is improved, but working life deteriorates due to poor strength
Solution Approach 1:
The patent employs composite materials where carbon nanotubes and conductive polymers form a robust matrix surrounding and supporting the nanoporous metal structure. The carbon nanotubes provide exceptional mechanical strength and structural integrity, preventing collapse or degradation of the nanoporous structure during repeated use. This composite architecture maintains the sensitivity benefits of nanoporous metal while significantly extending the electrode's working life through enhanced mechanical durability.
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 composite structure enhances the biosensor's sensitivity, mechanical strength, and stability, reducing internal resistance and extending the working life by utilizing carbon nanotubes and nano-oxides for effective biochemical signal collection and conversion.
Implementation Method 1
incorporating carbon nanotubes embedded in a metal ligament network, with nano-oxides or metal particles for enhanced catalytic properties, improving mechanical strength, conductivity, and stability
Implementation Method 2
The material having electrocatalytic properties are generally combined with the electrode by bonding or physical contact. The material having an electrocatalytic activity is reacted with a biomolecule to be measured for catalytic use.
Data Source
AI summary
A biosensor electrode comprises comprising a porous structure comprising a plurality of metal ligaments and a plurality of pores; and at least one carbon nanotube structure embedded in the porous structure and comprising a plurality of carbon nanotubes joined end to end by van der Waals attractive force, wherein the plurality of carbon nanotubes are arranged along a same direction.