Carbon Nanotube Sensor for Chemical Analysis
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Solution Overview
Problem
Conventional systems for analyzing sample constituents, such as food samples, are limited in applicability, expensive, or difficult to use, necessitating improved methods for identification and quantification of compounds responsible for taste and other molecular species.
Innovation Solution
Employing carbon nanotubes and other fullerenes to modulate electrical properties in response to compound interactions, generating unique signatures for identification and quantification through changes in DC electrical resistance and AC impedance, with sensors functionalized for specific compounds and statistical analysis using calibration data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional systems are used for analyzing sample constituents, then analysis can be performed, but the systems are expensive and difficult to use
Solution Approach 1:
The patent replaces complex mechanical and optical analysis systems with an electrical sensing system using carbon nanotubes. The mechanical/physical interaction between compounds and nanotubes is transduced into electrical signals (resistance changes), which are easier to measure and process electronically, thereby simplifying the overall system operation while maintaining measurement precision.
Solution Approach 2:
The patent utilizes changes in electrical parameters (resistance, conductance) of carbon nanotubes in response to compound interactions. By monitoring these electrical parameter changes, the system achieves precise identification and quantification without requiring complex mechanical or optical instrumentation, thus reducing operational difficulty.
2Measurement precision
If conventional systems are used for analyzing sample constituents, then analysis can be performed, but the systems have limited applicability
Solution Approach 1:
The patent employs carbon nanotubes as a universal sensing platform that can interact with various types of compounds (organic molecules, inorganic substances, proteins) through different interaction mechanisms. The same basic sensor structure can detect multiple analytes by modifying the nanotube surface or using different nanotube configurations, thereby achieving broad applicability across diverse sample types.
Solution Approach 2:
The system achieves versatility by monitoring electrical parameter changes in carbon nanotubes that can result from interactions with different compound classes. By analyzing the pattern and magnitude of resistance changes, the system can identify and quantify various constituents including taste compounds, gluten proteins, and other molecular species, expanding its applicability beyond single-analyte detection.
3Measurement precision
If carbon nanotubes are used to detect compounds, then unique signatures can be generated for identification, but the system complexity increases
Solution Approach 1:
The patent divides the sensing function into modular components: the carbon nanotube array serves as the universal sensing element, while specific functionalizations or surface modifications can be applied to target particular analytes. This segmentation allows the system to maintain high identification accuracy through unique electrical signatures while reducing overall complexity by using a standardized nanotube platform that can be adapted for different applications.
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
Enables effective identification and quantification of taste-related compounds and other molecular species in food samples, providing a broad applicability for organic and inorganic compounds, including gluten proteins, with potential for wearable devices for chemical analysis.
Implementation Method 1
the interaction, e.g., contact, of a compound (e.g., sugar molecules) with a plurality of carbon nanotubes can change the DC electrical resistance of the nanotubes
Implementation Method 2
the signature of a compound can be based on the way its interaction, e.g., contact, with a plurality of carbon nanotubes, or other fullerenes, can change the AC impedance of the carbon nanotubes
Implementation Method 3
a variety of different compounds, and in particular those that are responsible for the sensation of taste, can modulate the electrical properties of fullerenes, such as carbon nanotubes
Data Source
AI summary
Methods and devices for detecting a target agent of interest, e.g., a pathogen, in a sample are described herein. In some embodiments, a sensor is provided that can include a substrate, a graphene layer disposed on a surface of said substrate, and a protein bound to said graphene layer. The protein can be capable of binding to one or more target agents of interest, e.g., pathogens, etc. The binding of the protein to the one or more target agents of interest can generate a change in an electrical property of the graphene layer.