Nanopore DNA Data Reading Using RF Capacitance Sensing
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Solution Overview
Problem
Current DNA data storage methods using nanopore devices face challenges in achieving high precision, reliability, and scalability for reading long DNA strands due to difficulties in detecting small changes in current and capacitance, and the need for slow DNA passage through nanopores, which limits the reading of large data volumes.
Innovation Solution
A nanofluidic system with nanochips containing separate reaction compartments connected by nanopores allows for the synthesis and rapid reading of long DNA strands, using capacitive variance measurements and a resonant RF circuit to detect DNA sequences as they pass through the nanopore, enabling faster and more accurate data storage and retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If DNA passes through nanopore slowly for accurate reading, then measurement precision improves, but productivity deteriorates
Solution Approach 1:
The system applies periodic voltage pulses to the nanopore device, creating oscillating electric fields that cause DNA to move back and forth through the nanopore. This periodic motion allows multiple readings of the same DNA sequence at different positions and times, improving measurement precision while maintaining higher overall productivity compared to slow continuous passage.
Solution Approach 2:
The system maintains continuous voltage application and DNA translocation through the nanopore, enabling uninterrupted sequential reading of DNA bases. This continuous action eliminates idle time between readings and maintains high productivity while achieving accurate base identification through sustained measurement processes.
2Productivity
If DNA passes through nanopore quickly for high productivity, then productivity improves, but measurement precision deteriorates
Solution Approach 1:
The system uses real-time feedback from current measurements to adjust voltage application and DNA translocation speed. When measurement precision is compromised due to fast passage, the feedback mechanism slows down translocation or triggers re-reading, ensuring accurate base identification while minimizing overall time loss.
Solution Approach 2:
Periodic voltage pulsing creates controlled oscillations that slow DNA passage temporarily at critical measurement points, allowing high-speed overall translocation to be combined with periodic high-precision measurement windows, thus maintaining both productivity and accuracy.
3Measurement precision
If small changes in current and capacitance are detected for accurate sequencing, then measurement precision improves, but device complexity increases
Solution Approach 1:
The system combines current measurement and capacitance measurement into a single integrated detection system at the nanopore. By merging these two measurement modalities, the device achieves high sequencing accuracy through multiple physical parameters while reducing overall device complexity compared to separate independent measurement systems.
Solution Approach 2:
The detection system is designed to perform multiple functions - measuring both current and capacitance changes - using a single integrated sensor platform. This multi-functionality reduces device complexity by eliminating the need for separate specialized sensors for each measurement type.
4Quantity of substance
If long DNA strands are synthesized and read in single pass, then information density improves, but reliability deteriorates
Solution Approach 1:
The system implements real-time feedback monitoring during long DNA strand translocation, continuously assessing signal quality and base identification confidence. When errors are detected or signal quality degrades during the long passage, the system triggers verification readings or adjusts measurement parameters, maintaining high reliability despite the extended reading process required for high information density.
Solution Approach 2:
Periodic verification and re-reading of DNA sequences are performed during long strand analysis, allowing errors to be detected and corrected while maintaining the overall high information density achieved through long DNA passage. This periodic quality control ensures reliability without requiring multiple complete passes through the entire sequence.
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 approach enables high-density, reliable, and rapid DNA data storage and reading, with the ability to process sequences at up to one million bases per second, improving upon existing methods by increasing information density and reducing errors.
Implementation Method 1
measuring an impedance change in a high frequency signal induced by a change in capacitance as monomers pass through the nanopore
Implementation Method 2
measuring an impedance change in a high frequency signal induced by a change in capacitance as monomers pass through the nanopore
Implementation Method 3
measuring a change in current as the DNA passes through the nanopore
Implementation Method 4
a pulsating direct current draws the charged polymer through the nanopore
Data Source
AI summary
The disclosure provides a novel system of storing information using a charged polymer, e.g., DNA, the monomers of which correspond to a machine-readable code, e.g., a binary code, and which can be synthesized and/or read using a novel nanochip device comprising nanopores; novel methods and devices for synthesizing oligonucleotides in a nanochip format; novel methods for synthesizing DNA in the 3′ to 5′ direction using topoisomerase; novel methods and devices for reading the sequence of a charged polymer, e.g., DNA, by measuring capacitive or impedance variance, e.g., via a change in a resonant frequency response, as the polymer passes through the nanopore; and further provides compounds, compositions, methods and devices useful therein.