Electret DNA Separation Valve for Power-Free Sample Transfer
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Solution Overview
Problem
Existing methods for detecting RNA, DNA, or DNA-like molecules require expensive laboratory equipment and trained personnel, making them inefficient and costly for mass-scale applications, particularly in personalized treatments and microbiome analysis.
Innovation Solution
A multi-chambered sensor device with electrets and valves that isolates single-stranded DNA from biological samples without an internal power source, using passive principles to transfer and concentrate charged molecules between compartments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional laboratory methods are used for detecting DNA molecules, then detection accuracy is maintained, but device complexity and cost increase significantly
Solution Approach 1:
The device is divided into multiple compartments (first compartment, second compartment, third compartment) separated by barriers with valves. Each compartment performs a specific function: lysis, separation, and detection. This segmentation allows complex DNA detection to be broken down into simpler, manageable steps that can be performed in a disposable device without requiring complex laboratory equipment.
Solution Approach 2:
Valves act as intermediaries between compartments, controlling the transfer of liquids and DNA molecules. The valves enable selective passage of materials while maintaining isolation between compartments, allowing the device to achieve laboratory-grade separation and detection capabilities through a simple mechanical intermediary structure.
2Reliability
If traditional laboratory methods are used for detecting DNA molecules, then reliable results are obtained, but ease of operation deteriorates due to requiring trained personnel
Solution Approach 1:
The device is designed as a self-contained system where the barrier and valves automatically control liquid flow and DNA transfer between compartments. The structure performs separation and concentration functions without requiring external intervention or specialized knowledge, enabling anyone to obtain reliable DNA detection results by simply adding sample and reagent solutions.
Solution Approach 2:
The device is implemented as a disposable structure that can be manufactured at low cost. After a single use, the entire device is discarded, eliminating the need for cleaning, maintenance, or sterilization procedures. This disposable nature makes the device as easy to operate as any consumable test strip while maintaining reliable results.
3Extent of automation
If active power sources are used in the sensor device, then automation and precision are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The device replaces electronic actuation with passive mechanical structures. The barrier with integrated valves uses the physical properties of liquids and DNA molecules (charge, size, concentration) to drive automatic transfer between compartments. This mechanical substitution eliminates all electronic components, power sources, and control circuits while maintaining automated, precise DNA separation and detection.
Solution Approach 2:
The device exploits changes in physical parameters (electrostatic charge, molecular size, concentration gradients) to drive DNA transfer and separation. By changing these parameters naturally through chemical reactions and diffusion, the device achieves automation without requiring external power sources or electronic control systems.
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 low-cost, disposable, and user-friendly detection of specific DNA sequences, suitable for personalized treatments and microbiome analysis, without the need for complex electronics or trained personnel.
Implementation Method 1
a plurality of electrets within at least one of the first and second solution compartments, the plurality of electrets sized and shaped to accumulate the charged molecules at a focal zone
Implementation Method 2
the conductive extension is configured parallel to the first electret, thereby inducing a charge gradient within the valve that attracts the charged molecules to the cavity. Following rotation of the valve such that the cavity faces the second solution compartment, the conductive extension is parallel to the second electret, thereby inducing a charge gradient within the valve that repels the charged molecules from the cavity
Data Source
AI summary
An apparatus for transferring charged molecules between a first solution compartment and a second solution compartment includes: a barrier arranged between the first and second solution compartments: a valve configured within the barrier: and a plurality of electrets within at least one of the first and second solution compartments. the plurality of electrets sized and shaped to accumulate the charged molecules at a focal zone on a first solution compartment side of the valve. The valve may include a cavity within the valve for receipt of the charged molecules, wherein rotation of the cavity relative to the barrier causes delivery of the charged molecules within the cavity from the first solution compartment side of the valve to a second solution compartment side of the valve. The valve may be made of a conductive material and include a conductive extension opposite the cavity.