Thin-Layer Thermal Cycling Device for Rapid PCR Assays
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Solution Overview
Problem
Current methods for rapid and precise temperature control in chemical, biological, and medical assays, such as PCR, face challenges in efficiently changing temperatures due to high thermal mass, heat loss, and sample evaporation, which hinder rapid and uniform temperature changes.
Innovation Solution
The development of a device with a sample holder that compresses samples into a thin layer between two plates, using a heating layer that absorbs electromagnetic waves for rapid temperature changes, and includes a sealing mechanism to prevent evaporation, optimizing thermal absorption and conduction for efficient heating and cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional thermal control methods are used, then temperature control is achieved, but temperature change speed is slow and energy consumption is high
Solution Approach 1:
The patent replaces traditional mechanical thermal control systems with electromagnetic radiation heating. The heating layer absorbs electromagnetic waves and converts them to thermal energy, enabling rapid temperature changes without the slow thermal conduction limitations of mechanical systems. This substitution achieves fast heating (30°C to 90°C in 2 seconds) with minimal energy consumption.
Solution Approach 2:
The patent changes the physical state of the sample by compressing it into a thin layer between two plates. This parameter change reduces the sample's thermal mass and increases its surface area-to-volume ratio, enabling faster thermal response and more efficient energy transfer during temperature cycling.
2Productivity
If rapid temperature changes are implemented, then assay efficiency is improved, but sample evaporation increases
Solution Approach 1:
The patent uses a sealing mechanism that creates a closed environment around the thin-layer sample between two plates. This sealing structure prevents sample evaporation during rapid heating cycles while allowing the thin film configuration to maintain fast thermal response, thus preserving sample integrity during efficient temperature cycling.
3Temperature
If samples are heated in bulk, then complete heating is achieved, but heating time increases and uniformity decreases
Solution Approach 1:
The patent applies heating locally to a thin layer of sample rather than heating bulk material. The heating layer is positioned in direct contact with or near the thin-layer sample, creating a localized high-energy-density zone that achieves uniform rapid heating throughout the sample volume without the time and energy costs of bulk heating.
Solution Approach 2:
The patent transitions from three-dimensional bulk sample heating to two-dimensional thin-layer heating by compressing the sample between two plates. This dimensional reduction decreases the heating path length and thermal mass, enabling faster and more uniform temperature distribution across the sample area.
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 rapid temperature changes (e.g., from 30°C to 90°C in 2 seconds) with minimal energy consumption, maintaining sample integrity and reducing evaporation, thus enhancing the efficiency of assays like PCR.
Implementation Method 1
using a heating layer that absorbs electromagnetic waves for rapid temperature changes
Implementation Method 2
optimizing thermal absorption and conduction for efficient heating and cooling
Data Source
AI summary
The present invention provides devices, systems, and methods for rapid and easy-to-use in sample thermal cycling or temperature changes for the facilitation of reactions such as but not limited to PCR.