Microfluidic Analyzer High Throughput Nanoparticle Detection
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Solution Overview
Problem
Current systems for detecting and measuring nanoparticles in fluids are bandwidth-limited, complex, and costly to fabricate and operate, making them inefficient for high-throughput label-free measurement of nano- and micro-particles.
Innovation Solution
A microfluidic analyzer with a microfluidic channel and embedded voltage-bias electrodes that employs the resistive pulse technique to achieve high electrical bandwidth, using simple microfabrication technologies and a constriction-based voltage divider to sense particle size and number, with optional filtration to block undesired particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional resistive pulse technique is used for nanoparticle detection, then particle counting and sizing can be achieved, but the system is bandwidth-limited by current-sensing capabilities
Solution Approach 1:
The patent replaces current-sensing electronics with voltage-sensing electronics in the resistive pulse measurement system. By measuring voltage changes across a known resistance rather than current changes, the system achieves higher bandwidth without being limited by current-sensing capabilities, thus resolving the bandwidth limitation while maintaining particle detection functionality
Solution Approach 2:
The patent changes the electrical measurement parameter from current to voltage. By transforming the measurement approach from current-sensing to voltage-sensing, the system overcomes the bandwidth limitation inherent in traditional current-sensing electronics while maintaining the core particle detection capability
2Measurement precision
If fluidic voltage divider is used for microparticle detection, then particle detection is achieved, but the system becomes complex three-dimensional structure that is costly to fabricate and operate
Solution Approach 1:
The patent extracts and simplifies the voltage divider function into a two-electrode configuration embedded directly in the microfluidic channel. This eliminates the need for complex three-dimensional fluidic voltage divider structures, reducing fabrication complexity and cost while maintaining particle detection capability
Solution Approach 2:
The patent creates a simplified copy of the voltage divider function using straightforward two-electrode voltage sensing in the microfluidic channel, replacing complex three-dimensional structures with a simpler planar implementation that is easier to manufacture
3Productivity
If high throughput detection is achieved, then measurement speed increases, but system complexity and cost increase
Solution Approach 1:
The patent segments the detection system into simple, modular components: microfluidic channel, two voltage-bias electrodes, and one readout electrode. This segmentation allows for high throughput detection while keeping each component simple and easy to manufacture, avoiding the complexity that would otherwise increase with higher detection rates
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 high-throughput detection of particles with sizes <100 nm at rates exceeding 500,000 particles per second, providing finer size resolution and lower costs, making it suitable for various applications including quality control and biomolecular detection.
Implementation Method 1
The present invention employs the resistive pulse technique (RPT) implemented in a manner that affords very high electrical bandwidth for the device
Data Source
AI summary
The present invention reports a novel microfluidic analyzer for the high-throughput, label-free measurement of particles suspended in a fluid. The present invention employs the resistive pulse technique (RPT) which affords very high electrical bandwidth for the device, which surpasses that of currently available systems and devices. Further, devices in accordance with the present invention are fabricated with very simple microfabrication technologies, making the present invention more cost efficient and easier to manufacture than currently available devices.