Photothermal Gene Amplification Chip for Faster Point-of-Care Testing
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Solution Overview
Problem
Existing nucleic acid amplification techniques, such as PCR, are cumbersome and time-consuming, necessitating a compact and efficient solution for point-of-care testing and personal diagnostics.
Innovation Solution
A gene amplification chip with a photothermal film that converts light into heat for rapid sample heating, integrated with a chamber layer and cover layer, allowing for efficient nucleic acid amplification in a compact form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional PCR methods are used, then amplification accuracy is maintained, but device complexity and process time increase
Solution Approach 1:
The patent merges multiple PCR functions (heating, cooling, mixing, sample preparation) into a single integrated microchip device. The chip combines a reaction chamber, photothermal heating element, magnetic separation module, and fluidic channels into one compact unit, eliminating the need for separate equipment while maintaining amplification accuracy through controlled thermal cycling and reagent mixing.
Solution Approach 2:
The patent employs nested structures where smaller functional components are embedded within larger ones. The microchip contains nested micro-chambers and channels within the main device body, with magnetic beads nested within the reaction mixture, and the photothermal converter layer nested within the chip structure. This nesting enables complex functionality in a compact form factor.
2Reliability
If traditional PCR methods are used, then amplification accuracy is maintained, but processing time increases
Solution Approach 1:
The patent performs preliminary actions by pre-loading the chip with magnetic beads functionalized with capture probes, pre-mixing reagents in separate reservoirs, and pre-positioning all components before sample addition. This preliminary preparation eliminates time-consuming setup steps during actual amplification, reducing total processing time while maintaining accuracy through controlled reaction conditions.
Solution Approach 2:
The patent implements continuous thermal cycling through the photothermal converter that can rapidly heat and cool the reaction chamber without interruption. The integrated design allows continuous mixing and reaction progression, eliminating downtime between steps. The light source can continuously provide thermal energy, and the magnetic actuation continuously mixes reagents, maintaining productive action throughout the amplification process.
3Volume of moving object
If compact chip design is implemented, then device portability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the chip into distinct functional layers and modules that can be manufactured separately and then assembled. The chip is divided into a substrate layer, photothermal converter layer, reaction chamber layer, and cover layer, each with specific features fabricated independently using appropriate techniques (molding, lithography, bonding). This segmentation allows each component to be optimized for its specific manufacturing requirements, reducing overall precision demands.
Solution Approach 2:
The patent uses thin film structures for the photothermal converter and chamber walls, which can be fabricated with standard thin-film deposition techniques rather than requiring precision machining of thick components. The flexible nature of thin films allows for complex three-dimensional chamber geometries to be created with simpler manufacturing processes, reducing the need for high-precision fabrication while maintaining compact dimensions.
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
The chip enables rapid and efficient nucleic acid amplification, reducing processing time and enhancing user convenience for point-of-care and personal diagnostic applications.
Implementation Method 1
a photothermal film attached to an outer surface of the bottom layer, and configured to convert light into heat to heat the sample solution received in the chamber
Data Source
AI summary
A gene amplification chip may include: a cover layer having a solution inlet through which a sample solution to be injected; a chamber layer disposed on one surface of the cover layer, and having a chamber to receive the sample solution when the sample solution is injected through the solution inlet such that an amplification reaction of the sample solution occurs in the chamber; a bottom layer disposed on another surface of the chamber layer; and a photothermal film attached to an outer surface of the bottom layer, and configured to convert light into heat to heat the sample solution received in the chamber.