Metal Nanoparticle ITO Biosensor Electrode for Stable Signal Detection
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Solution Overview
Problem
Conventional biosensors face challenges in achieving superior sensitivity due to adverse effects on electrochemical signal measurement when treating the surface with biosupports, which are typically non-conductive and can impede the detection of biomarkers in urine samples.
Innovation Solution
A novel method for manufacturing a working electrode using an ITO glass electrode with a fixing material that includes a conjugate of a linker compound and metal nanoparticles, along with a response factor, enhancing electron transfer and sensitivity by immobilizing a response factor capable of binding to biomarkers, thereby improving the biosensor's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the surface of ITO glass electrode is treated with biosupport, then the response factor can be immobilized on the electrode surface, but the electrochemical signal measurement is impeded due to the non-conductive nature of biosupport
Solution Approach 1:
The patent applies composite materials by combining biosupport with metal nanoparticles to create a dual-functional coating layer. The biosupport provides immobilization stability for the response factor, while the metal nanoparticles maintain electrical conductivity for electrochemical signal measurement. This composite structure resolves the contradiction between reliable immobilization and precise measurement.
Solution Approach 2:
Metal nanoparticles serve as an intermediary between the non-conductive biosupport and the conductive ITO electrode. They bridge the electrical connection while allowing the biosupport to perform its immobilization function, thus enabling both stable response factor attachment and effective electrochemical signal detection.
2Measurement precision
If metal nanoparticles are added to enhance sensitivity, then electron transfer is improved, but the device complexity increases due to additional materials and steps
Solution Approach 1:
The patent merges the immobilization function and conductivity enhancement function into a single coating step by using a conjugate of biosupport and metal nanoparticles. This combined approach achieves sensitivity improvement without proportionally increasing manufacturing complexity, as both functions are delivered through one integrated material and process step.
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 method results in a biosensor with superior sensitivity and ease of application to existing ELISA systems, allowing for reliable on-site diagnosis of diseases by measuring biomarker concentrations with increased accuracy and reliability.
Implementation Method 1
enhancing electron transfer and sensitivity by immobilizing a response factor capable of binding to biomarkers
Implementation Method 2
immobilizing a fixing material on the surface of the ITO glass electrode, in which the fixing material includes a first compound and a second compound and the second compound is a conjugate of a linker compound and metal nanoparticles
Implementation Method 3
immobilizing a response factor to the fixing material... a response factor capable of binding to biomarkers
Data Source
AI summary
A method for manufacturing a working electrode for a biosensor is proposed. The method may include providing an Indium Tin Oxide (ITO) glass electrode. The method may also include immobilizing a fixing material on the surface of the ITO glass electrode, wherein the fixing material comprises a first compound and a second compound, and wherein the second compound is a linker compound-metal nanoparticle conjugate. The method may further include immobilizing a reaction factor on the fixing material. An electrode manufactured by the method, and a method for measuring the concentration of biomarkers in a sample using a biosensor including the working electrode are also proposed.