Boron Nitrogen Co-Doped Graphene Oxide Gel Biosensor
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Solution Overview
Problem
Current nano-bioelectronics and biosensors face limitations in charge carrier mobility and sensitivity, particularly in detecting biological molecules, due to suboptimal materials and fabrication processes.
Innovation Solution
A boron and nitrogen co-doped graphene oxide gel (BN-GO gel) is fabricated using a laser ablation process, which enhances charge carrier mobility and ON/OFF current ratios, and is functionalized with bioreceptors without linkers to improve biosensing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional materials and fabrication processes are used for biosensors, then manufacturing simplicity is maintained, but charge carrier mobility and sensitivity are limited
Solution Approach 1:
The patent changes the chemical composition parameters of the graphene oxide by introducing boron and nitrogen dopants in specific ratios, which fundamentally alters the charge carrier mobility and sensitivity properties of the material without requiring complex multi-step fabrication processes
Solution Approach 2:
The patent creates a composite material system by combining graphene oxide with boron and nitrogen dopants, achieving enhanced electrical properties and detection sensitivity while maintaining the simplicity of the gel-based fabrication approach
2Reliability
If bioreceptors are functionalized using traditional linker methods, then stable binding is achieved, but distance from channel surface increases reducing sensitivity
Solution Approach 1:
The patent removes the intermediary linker component from the functionalization process, allowing bioreceptors to bind directly to the BN-GO gel channel surface, which eliminates the distance barrier while maintaining stable binding through direct covalent or electrostatic interactions
Solution Approach 2:
The BN-GO gel surface itself acts as the intermediary between the bioreceptor and the analyte, providing both the binding platform and the electrical conduction pathway, thereby eliminating the need for separate linker molecules
3Speed
If standard graphene oxide gels are used, then material simplicity is maintained, but charge carrier mobility remains suboptimal
Solution Approach 1:
The patent modifies the material parameters by incorporating boron and nitrogen dopants into the graphene oxide structure, which changes the electronic band structure and increases charge carrier mobility while maintaining the gel form factor
Solution Approach 2:
The boron and nitrogen dopants are distributed throughout the graphene oxide gel matrix, creating localized regions of enhanced electrical conductivity that collectively improve the overall charge carrier mobility of the material
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 BN-GO gel-based biosensors exhibit improved detection range and sensitivity for bio-analytes, with high carrier mobility and ON/OFF current ratios, enabling effective detection of biological molecules and environmental contaminants.
Implementation Method 1
A laser ablation process for the fabrication of a boron and nitrogen co-doped graphene oxide gel (BN-GO gel)
Data Source
AI summary
The gel made of graphene oxide co-doped with boron nitrogen can be functionalized with a receptor, can be passivated by a passivation agent, and can have particular expressions of bonds to favor charge carrier mobility. The gel can be used in the context of a sensor via the interaction between the receptor and an analyte to be detected.