Nanopore Sensor Low-Noise Preamplifier Bandwidth
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Solution Overview
Problem
Current DNA sequencing technologies face challenges in achieving single-molecule, massively parallel, and real-time detection due to weak optical signals from single fluorophores and noise-limited bandwidths in nanopore measurements, which restricts scaling and multiplexed integration.
Innovation Solution
The development of a low-noise multi-channel micro-scale preamplifier with integrated microelectrodes for nanopore sensors, including monolithic integration of solid-state or biological nanopores, reduces parasitic capacitances and enhances high-frequency noise performance, enabling improved bandwidth and throughput for single-molecule detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If single-molecule optical detection is used, then detection capability is achieved, but signal strength is weak
Solution Approach 1:
The patent replaces optical detection with electrochemical detection using nanopores. Instead of measuring weak optical signals from fluorophores, the system measures ionic current changes as molecules pass through nanopores, providing stronger signals with better signal-to-noise ratios while maintaining single-molecule detection capability.
Solution Approach 2:
The patent changes the detection parameter from optical signal intensity to ionic current modulation. By monitoring changes in ionic current as molecules translocate through nanopores, the system achieves stronger detection signals with improved signal-to-noise characteristics compared to optical methods.
2Device complexity
If off-the-shelf electronics are used for nanopore measurements, then device complexity is reduced, but noise-limited bandwidth is less than 100 kHz
Solution Approach 1:
The patent merges the nanopore sensor with custom-designed low-noise preamplifier electronics on a single integrated circuit. This integration reduces parasitic capacitances and noise, enabling bandwidths exceeding 100 kHz while maintaining manageable device complexity through monolithic fabrication.
Solution Approach 2:
The patent replaces standard off-the-shelf electronics with custom-designed low-noise preamplifier circuits specifically optimized for nanopore measurements. These custom electronics feature reduced parasitic capacitances and lower noise floors, enabling bandwidths greater than 100 kHz compared to the limitations of commercial equipment.
3Ease of operation
If nanopore measurements are performed with standard electronics, then ease of operation is maintained, but measurement bandwidth is limited
Solution Approach 1:
The patent combines the nanopore sensor and low-noise preamplifier into a single integrated device that is easier to operate than separate components. The integrated design eliminates complex wiring and alignment requirements while providing bandwidths exceeding 100 kHz, improving both ease of operation and measurement speed simultaneously.
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 solution significantly increases the noise-limited bandwidth of nanopore sensors, allowing for higher measurement frequencies and improved signal fidelity, enabling efficient detection and analysis of single molecules, such as DNA, with potential applications in DNA sequencing and biosensing.
Implementation Method 1
single-molecule detection and analysis based on the electrochemical conductance modulation of a solid-state or biological nanopore sensor
Implementation Method 2
measuring a current through the nanopore to detect the presence of a biomolecular entity, if any
Implementation Method 3
the microelectrodes can be on-die silver/silver-chloride (Ag/AgCl) microelectrodes
Data Source
AI summary
A system and method for detecting a single-molecule using an integrated circuit which includes at least one membrane having a nanopore located between first and second reservoirs and a low-noise preamplifier having an electrode formed on the surface thereof is provided. The method includes passing a target molecule through the nanopore, and measuring a current through the nanopore to detect the presence of a biomolecular entity, if any.