Nanoparticle Localized Heating for Nucleic Acid Amplification
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Solution Overview
Problem
Current nucleic acid amplification methods require heating the entire reaction volume, which can be inefficient and damaging to heat-sensitive samples, and often require significant energy and time.
Innovation Solution
The method employs nanoparticles that absorb optical energy and transfer heat locally to specific parts of the reaction volume, allowing for targeted heating and rapid amplification of nucleic acids without heating the entire sample, using nanoparticles with sizes between 2 and 500 nm, preferably made of metals like gold or silver, to achieve localized heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the entire reaction volume is heated for nucleic acid amplification, then amplification can be achieved, but energy consumption increases and heat-sensitive components are damaged
Solution Approach 1:
The patent applies local quality by using nanoparticles to generate heat only in specific localized regions where nucleic acid amplification is needed, rather than heating the entire reaction volume. This localized heating approach reduces overall energy consumption while maintaining amplification efficiency in the target areas.
Solution Approach 2:
The reaction volume is segmented into multiple zones with nanoparticles distributed throughout. Each nanoparticle cluster acts as an independent heating unit, allowing selective and distributed heating across the reaction volume, which improves energy efficiency compared to uniform heating of the entire volume.
2Productivity
If the entire reaction volume is heated for nucleic acid amplification, then amplification can be achieved, but the amplification time increases
Solution Approach 1:
The patent employs periodic action by applying alternating magnetic fields to the magnetic nanoparticles in periodic cycles. This periodic heating enables rapid temperature fluctuations that accelerate the PCR amplification cycles, reducing the overall amplification time compared to conventional continuous heating methods.
Solution Approach 2:
The patent utilizes parameter changes by varying the frequency and amplitude of the alternating magnetic field applied to the nanoparticles. By optimizing these parameters, the heating efficiency and rate are enhanced, leading to faster nucleic acid amplification while consuming less total energy.
3Use of energy by moving object
If nanoparticles are used for localized heating, then energy efficiency improves and amplification speed increases, but the device complexity increases
Solution Approach 1:
The patent applies self-service by using the inherent magnetic properties of the magnetic nanoparticles to generate heat directly in response to the alternating magnetic field. The nanoparticles self-heat through magnetic hysteresis without requiring external heating mechanisms, simplifying the overall device design while maintaining energy efficiency.
Solution Approach 2:
The magnetic nanoparticles serve as an intermediary between the alternating magnetic field and the nucleic acid amplification process. They convert electromagnetic energy into localized thermal energy, mediating the energy transfer and enabling efficient heating without direct contact between the heat source and the reaction mixture.
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 faster and more energy-efficient nucleic acid amplification, preserving heat-sensitive components and allowing for the use of non-thermostable DNA polymerases, while reducing the time and energy required for amplification.
Implementation Method 1
nanoparticles that absorb optical energy and transfer heat locally to specific parts of the reaction volume
Implementation Method 2
transfer heat locally to specific parts of the reaction volume
Implementation Method 3
surface plasmon resonance or fluorescence resonance energy transfer to allow real-time monitoring of a PCR reaction
Implementation Method 4
surface plasmon resonance or fluorescence resonance energy transfer to allow real-time monitoring of a PCR reaction
Data Source
Figure 1a~1d
Figure 1e~1h
Figure 2a~2e
AI summary
Method for the amplification of nucleic acids. A method for the amplification of nucleic acids (1), in which nanoparticles (8) in a reaction volume (2) transfer heat to their environment through excitation.