Electrochromic Microfluidic Detection for Position-Independent Analysis
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Solution Overview
Problem
Current microfluidic apparatuses face challenges in detecting substances efficiently, as they require the substance to be positioned specifically for detection, which is inconvenient and limits detection efficiency and accuracy.
Innovation Solution
A microfluidic apparatus with an electrochromic layer and photodetectors that can be controlled in a time-division mode, allowing for both microfluid position determination and analyte detection, where the electrochromic layer's regions can be made transmissive or non-transmissive to optimize light transmission and detection, enabling substance detection without needing to move the substance to a specific position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the substance must be positioned specifically for detection, then the detection can be performed, but the detection efficiency and accuracy are limited and the operation is inconvenient
Solution Approach 1:
The detection area is segmented into multiple independently controllable electrochromic regions that can be selectively activated. Each region can be independently controlled to be transmissive or non-transmissive, allowing the system to create a detection window at any position along the microfluidic channel without moving the substance or the entire detection system.
Solution Approach 2:
The electrochromic layer provides dynamic control over light transmission by switching between transmissive and non-transmissive states. This dynamic capability allows the system to adaptively create detection zones at different positions along the channel based on where the substance is located, eliminating the need for precise pre-positioning.
2Measurement precision
If the electrochromic layer regions are made selectively transmissive or non-transmissive, then light transmission is optimized for detection, but the device complexity increases
Solution Approach 1:
The electrochromic layer serves multiple functions: it acts as a variable optical shutter for light control, a positioning aid for visualizing microfluid location, and a selective window controller for detection. This multi-functionality reduces the need for separate components and simplifies the overall device architecture despite the added control capability.
Solution Approach 2:
The electrochromic layer utilizes optical property changes (transmissive to non-transmissive state transitions) to achieve detection optimization. This passive optical modulation eliminates the need for active mechanical moving parts or complex optical switching mechanisms, reducing device complexity while maintaining detection precision.
3Productivity
If the apparatus can detect substances in any region without moving the substance, then detection efficiency improves, but the control mechanism becomes more complex
Solution Approach 1:
The patent replaces mechanical movement (moving the substance or detection head) with an electrical/optical control system. By using electrochromic regions that can be electrically switched to create detection windows at different positions, the system achieves positional flexibility without mechanical actuation, improving detection efficiency while keeping control complexity manageable through electronic addressing.
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 enhances detection efficiency and accuracy by allowing the microfluidic apparatus to detect substances in any region, improving the overall detection process without the need to position the substance, thereby increasing the efficiency and precision of the detection.
Implementation Method 1
an electrochromic layer comprising a plurality of individually independently addressable regions; wherein the electrochromic layer is configured to be switched between a first state in which the plurality of individually independently addressable regions of the electrochromic layer are substantially transmissive, and a second state in which at least a first one of the plurality of individually independently addressable regions of the electrochromic layer in a region corresponding to a position of the microfluid is substantially transmissive
Implementation Method 2
a plurality of photodetectors configured to detect light transmit through the microfluid
Data Source
AI summary
A microfluidic apparatus is provided. The microfluidic apparatus includes an electrochromic layer including a plurality of individually independently addressable regions; a microfluidic layer defining a microfluidic channel for allowing a microfluid to pass therethrough; and a plurality of photodetectors configured to detect light transmit through the microfluid. The electrochromic layer is configured to be switched between a first state in which the plurality of individually independently addressable regions of the electrochromic layer are substantially transmissive, and a second state in which at least a first one of the plurality of individually independently addressable regions of the electrochromic layer in a region corresponding to a position of the microfluid is substantially transmissive, at least a second one of the plurality of individually independently addressable regions of the electrochromic layer outside the region corresponding to the position of the microfluid is substantially non-transmissive.