Biosensor Orientation Control for Signal Noise Reduction
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Solution Overview
Problem
Biosensors face reliability issues due to contamination from non-specific binding events, which introduce noise and decrease the signal-to-noise ratio, making it difficult to accurately detect specific binding pairs on the sensing surface.
Innovation Solution
Applying a controlled electromagnetic force to alter the spatial orientation of the binding pair, allowing for the separation of contaminants from the binding pair, and using the difference in sensor measurements between initial and altered orientations to filter out contaminant contributions, thereby improving the signal-to-noise ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensing surface is used to detect specific binding pairs, then detection capability is improved, but non-specific binding events introduce noise that decreases measurement reliability
Solution Approach 1:
The patent applies dynamic control by periodically altering the spatial orientation of the binding pair using electromagnetic forces. This dynamic manipulation allows the system to transition between different states (initial orientation and altered orientation), enabling discrimination between specific binding signals and non-specific binding noise through differential measurement.
Solution Approach 2:
The patent changes physical parameters by applying electromagnetic forces to alter the spatial orientation of the binding pair. By modifying the orientation parameter and measuring at different orientations, the system can separate specific binding signals from non-specific binding noise, thereby improving measurement reliability without sacrificing detection capability.
2Measurement precision
If electromagnetic force is applied to alter spatial orientation of binding pair, then signal-to-noise ratio is improved, but device complexity increases
Solution Approach 1:
The sensing surface serves multiple functions: it acts as both the detection platform for binding events and the means to apply electromagnetic forces for orienting the binding pair. This multi-functionality reduces the need for separate actuation mechanisms, thereby limiting the increase in device complexity while still achieving signal-to-noise ratio improvement through orientation control.
Solution Approach 2:
The patent replaces complex mechanical manipulation systems with electromagnetic fields to control the spatial orientation of the binding pair. This substitution simplifies the device architecture by using field-based control rather than mechanical actuators, achieving signal-to-noise ratio improvement without proportionally increasing device complexity.
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
This method enhances the accuracy of biosensor readings by effectively separating and filtering out noise from non-specific binding events, leading to improved signal clarity and reliability.
Implementation Method 1
applying a first electromagnetic force to the sensing surface to alter the spatial orientation of the binding pair
Data Source
AI summary
A method of performing a measurement with a sensor having a sensing surface and at least one capture molecule attached to the sensing surface for forming a binding pair with an analyte of interest, the binding pair having a flexible spatial orientation, the method comprising capturing the analyte of interest with the capture molecule, thereby forming the binding pair in an initial spatial orientation; applying a first electromagnetic force to the sensing surface to alter the spatial orientation of the binding pair; and performing a sensor measurement with the binding pair in the altered spatial orientation. A sensor apparatus implementing this method is also disclosed.