Microfluidic Chip Acoustic Heating Electrode Array
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Solution Overview
Problem
Existing microscale heating technologies for microfluidic chips face inefficiencies in heating, high costs, and limited visibility due to the use of metal blocks, indium tin oxide films, and infrared sources, which result in low heating efficiency, high costs, and fixed heating regions.
Innovation Solution
A microfluidic chip design featuring an electrode layer that converts electrical signals into acoustic signals, which are absorbed by a functional layer to generate thermal energy, allowing for high energy conversion efficiency and localized heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If metal blocks or films are used as heating electrodes, then heating efficiency is improved, but cost increases and visibility is reduced
Solution Approach 1:
The patent replaces expensive precious metals (platinum, gold) with inexpensive conductive materials such as aluminum, copper, or graphite for the heating electrodes. This substitution dramatically reduces manufacturing cost while maintaining adequate heating functionality, accepting that the electrodes may have shorter operational lifespan but achieving cost-effectiveness for the application
Solution Approach 2:
The patent uses transparent or translucent materials for the chip substrate and heating electrodes that allow optical observation. By selecting materials with appropriate optical properties (transparent indium tin oxide, transparent conducting oxides, or thin transparent metal layers), the heating elements become visible or transparent, enabling real-time monitoring of the heating process and sample behavior without compromising heating efficiency
2Loss of energy
If metal blocks or films are used as heating electrodes, then heating efficiency is improved, but heating region adaptability deteriorates
Solution Approach 1:
The patent divides the heating function into multiple independent electrode segments or patterns that can be selectively activated. By segmenting the heating electrodes into distinct regions or individual elements, the system can activate only the specific heating zones needed for different experimental conditions, enabling flexible adaptation to various heating requirements while maintaining high efficiency in each activated region
Solution Approach 2:
The patent implements controllable and adjustable heating electrode configurations where the heating regions can be dynamically changed through electrical control. By using independently controllable electrode segments, patterned electrodes, or adjustable electrode configurations, the heating regions can be reconfigured in real-time to match different experimental needs, providing adaptability without sacrificing heating efficiency
3Temperature
If infrared heat source is used, then heating capability is achieved, but energy efficiency deteriorates and observation is affected
Solution Approach 1:
The patent replaces infrared radiation heating (electromagnetic field-based) with direct electrical heating through conductive electrodes (electrical field-based). This substitution uses Joule heating effect where electrical current directly heats the electrode and surrounding sample, eliminating the need for infrared radiation sources, lenses, and filters. The direct electrical-to-thermal conversion achieves higher energy efficiency while allowing optical observation to proceed uninterrupted
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 solution enables fast and efficient heating of specific regions within the microfluidic chip, reducing costs and improving visibility during experiments while maintaining high energy conversion efficiency.
Implementation Method 1
the electrode layer includes multiple electrode groups arranged in an array; The electrode group is configured to: When being activated, convert an electrical signal into an acoustic signal
Implementation Method 2
absorb the acoustic signal emitted by the activated electrode group and convert the acoustic signal into thermal energy
Implementation Method 3
heat the sample to be tested that is carried at a position corresponding to the activated electrode group
Data Source
AI summary
A microfluidic chip (100), an apparatus, a system, and a control and preparation method therefor. The method comprises: a substrate (101), and an electrode layer (102) and a functional layer (103) sequentially formed on the substrate (101), said electrode layer (102) comprising a plurality of electrode groups (1021) arranged in an array, the electrode groups (1021) being used for converting electrical signals into acoustic signals when an electrode group is activated, and transmitting the acoustic signals to the functional layer (103); and the functional layer (103) being used for carrying a sample to be tested, and for absorbing the acoustic wave signals emitted by the activated electrode group (1021) and converting same into thermal energy for heating the sample to be tested that is carried at the position corresponding to the activated electrode group (1021).