Array Paper Chip Layout for High-Throughput Viral Detection
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Solution Overview
Problem
Current methods for virus detection, such as those for the 2019-nCoV virus, face challenges in efficiency, cost, and equipment dependency, particularly in areas with limited medical resources, and require complex and costly instrumentation for temperature control in nucleic acid amplification reactions.
Innovation Solution
An array type paper chip with a glass substrate, paper unit layer, and cell grid layer, bonded with a highly-transparent adhesive, using Whatman Grade 1 filter paper and processed via digital laser engraving, enabling low-cost, low-environmental-impact production and precise temperature control for high-throughput detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional filter paper with capillary fiber structure is used for self-driving fluid, then the device complexity is reduced and ease of manufacture is improved, but the manufacturing precision and detection throughput are limited
Solution Approach 1:
The chip is divided into multiple independent detection units (e.g., 96-well array format) on a single paper substrate, allowing parallel processing of multiple samples simultaneously. This segmentation increases throughput while maintaining the simplicity of paper-based manufacturing.
Solution Approach 2:
The invention transitions from traditional 2D paper surfaces to 3D microfluidic channel structures within the paper matrix. Laser drilling creates vertical through-channels that enable precise fluid control and enhance manufacturing precision without sacrificing the ease of paper-based fabrication.
2Measurement precision
If complex instrumentation is used for temperature control in nucleic acid amplification, then the temperature control precision is improved, but the device complexity and cost increase
Solution Approach 1:
The paper chip structure itself provides thermal management through its inherent properties. The paper matrix acts as a thermal conductor and insulator, enabling passive temperature control during PCR cycles without requiring complex external instrumentation, thus reducing device complexity while maintaining adequate temperature control precision.
Solution Approach 2:
The invention optimizes physical parameters such as paper thickness, channel dimensions, and material composition to achieve appropriate thermal characteristics. By adjusting these parameters, the chip can be tailored for specific temperature control requirements without adding complex active control systems.
3Productivity
If high-throughput detection is implemented, then the productivity is improved, but the device complexity and processing requirements increase
Solution Approach 1:
The chip incorporates multiple detection units (e.g., 96 wells) arranged in an array format on a single paper substrate. This allows simultaneous processing of numerous samples, significantly increasing productivity while maintaining relatively simple device architecture based on conventional paper and laser-drilled channels.
Solution Approach 2:
The paper chip design integrates multiple functions including sample loading, fluid transport, reaction containment, and detection within a single platform. This multi-functionality achieves high-throughput detection without requiring separate complex devices for each function, thereby controlling overall device complexity.
4Manufacturing precision
If laser cutting and cladding process is used for chip fabrication, then the manufacturing precision is improved, but the use of energy and processing time increase
Solution Approach 1:
The invention replaces traditional mechanical cutting and molding methods with laser-based fabrication. Laser drilling and cutting provide high manufacturing precision for microfluidic channels while requiring less energy and generating less waste compared to mechanical processing methods, especially for small-scale and customized chip production.
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 solution enhances diagnosis efficiency, reduces reagent and instrument costs, simplifies operations, and provides accurate temperature control, enabling rapid and cost-effective detection of viral samples with minimal equipment dependency.
Implementation Method 1
the self-driving of fluid is realized by the capillary fiber structure inside
Implementation Method 2
adopting a digital laser engraving/cutting machine to integrate laser cutting with cladding of acrylic mucosa for processing
Data Source
AI summary
The invention relates to an array type paper chip for 2019-nCoV virus high-throughput detection and a manufacturing method of the array type paper chip. The array type paper chip comprises a glass substrate layer, a paper unit layer and a cell grid layer which are arranged in sequence from bottom to top, wherein the grid layer comprises N circular paper detection units with a diameter R being arranged in the form of an array; and the unit grids of the unit grid layer are in one-to-one correspondence to the paper detection units to separate the paper detection units. The array type paper chip is simple in structure, the manufacturing process is simple and stable, the finished products are stable, requirements on the processing environment and conditions are very low, and processing equipment is low in price. Moreover, the processing process does not revolve any chemical reagent, and therefore, the method is more environmentally friendly than methods such as ultraviolet lithography.