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Papers
20 resultsShowing papers similar to Microfluidic Microwave Sensor for Rapid Detection of Microplastics in Water: Optimization, Modeling, and Performance Evaluation
ClearDetection of microplastics by microfluidic microwave sensing: An exploratory study
Researchers developed a compact microwave sensor on a microfluidic chip to detect microplastics in water samples. The system works by measuring how the presence of plastic particles changes the electrical properties of water. While the technology shows promise as a rapid and portable detection method, its current sensitivity needs improvement before it can detect the low microplastic concentrations typically found in natural freshwater.
Microplastics Detection with Microfluidic Near-Field Microwave Sensors
A new microfluidic sensor integrating a microwave detector was developed that can identify microplastics in water in real time without labelling, by measuring how particles change the dielectric properties of the water flowing through the device. This kind of low-cost, continuous-monitoring sensor could make routine environmental surveillance for microplastic contamination more practical.
Microplastics detection with microfluidics integrated with a microwave sensor
Researchers developed a microwave sensor integrated with a microfluidic channel for real-time microplastics detection in water, using finite-element simulations to optimize sensitivity and validating performance experimentally. The system achieved a sensitivity of 0.1 dB and detected microplastics as small as 600 micrometers through measurement of reflected signal variations.
A Microwave-Based Sensing Platform for Microplastic Detection and Quantification: A Machine Learning-Assisted Approach
Researchers developed a low-cost microwave sensor combined with machine learning to detect and quantify microplastics in water and identify polymer types in unknown samples. The platform achieved the highest sensitivity reported among microwave-based approaches for microplastic detection, offering a promising low-cost alternative to spectroscopy-based methods.
Size and concentration characterization of microplastic particles in aqueous samples using sensitivity-enhanced coupled planar microwave resonators
Researchers developed a novel microwave sensing platform for real-time detection and characterization of microplastic particles in water samples. The sensor uses an enhanced coupled planar microwave resonator design with a low-cost disposable sample holder, enabling rapid, non-destructive measurement of microplastic particle size and concentration without cross-contamination between tests.
A Microwave-Based Sensing Platform for Microplastic Detection and Quantification: A Machine Learning-Assisted Approach
Researchers developed a low-cost microwave spiral sensor that can detect and differentiate three common types of microplastic (PTFE, PVC, PET) in water, achieving the highest sensitivity reported for microwave-based approaches and using machine learning to identify unknown polymer types. Affordable, reliable detection tools like this are critical for routine environmental monitoring of microplastic contamination in drinking water and waterways.
Passive Disposable Microwave Sensor for Online Microplastic Contamination Monitoring
Researchers developed a passive disposable microwave sensor for online monitoring of microplastic contamination in water, using a sensitivity-enhanced planar dual-resonator tag-reader structure combined with a silicon resonator to enable non-contact concentration measurement.
SRR-Based Disposable Microwave-Microfluidic Sensor for Assessing Liquid Carrier Influence on Microplastic Detection
Researchers developed a double split-ring resonator microwave-microfluidic sensor that can detect polyethylene microplastics in various liquid carriers (including agricultural water with dissolved salts), minimizing the effect of liquid composition on detection accuracy.
Portable Multichannel Measurement System for Real-Time Microplastics Assessment Using Microwave Sensors
Scientists developed a portable multichannel electronic system that uses microwave sensors to detect microplastics in water in real time, capable of simultaneously reading up to four sensors targeting particles of different sizes. The system combines radio-frequency integrated circuits with signal-conditioning hardware for field-deployable monitoring. This kind of low-cost, portable sensing technology could make routine microplastic screening much more practical at waterways and treatment facilities.
Based on a size of Microplastics, Multi-Channel Microwave Resonant MEMS Sensor
Researchers designed a multi-channel MEMS sensor that can simultaneously measure the concentration of microplastics and sort them by size using microwave resonance technology. This miniaturized detection approach addresses a key technical challenge in microplastic monitoring — the need for rapid, size-resolved quantification at low concentrations in water.
A Fully Integrated Microplastic Detection SoC with 0.1–3 GHz Bandwidth and 35 dB Dynamic Range for Narrow-Band Notch RF MEMS Sensor System
Engineers developed a miniaturized microwave sensor chip that can detect microplastics in water by measuring shifts in resonant frequency as particles pass through a microfluidic channel, achieving a wide bandwidth and high dynamic range in a compact integrated circuit design. This type of on-chip detection system could enable portable, real-time water quality monitoring for microplastic contamination at a fraction of the cost of laboratory methods.
Rapid Differentiation between Microplastic Particles Using Integrated Microwave Cytometry with 3D Electrodes
Researchers developed a rapid microplastic identification system combining integrated microwave cytometry with 3D electrodes to differentiate single microparticles in the 14–20 micrometer range as they flow through a microfluidic channel. The system demonstrated the ability to distinguish particle types based on dielectric properties, offering a faster and flow-compatible alternative to conventional spectroscopic techniques for environmental microplastic monitoring.
RF MEMS Resonance Sensor for Measuring Microplastics Concentration
Researchers designed an RF MEMS resonance sensor capable of detecting microplastics in water at low cost, offering a practical alternative to expensive conventional particle analyzers for environmental monitoring.
A Highly Sensitive Microwave Microfluidic Biosensor for Single-Cell Level Detection
This paper is not about microplastics; it presents a microwave biosensor for detecting tiny liquid samples at the single-cell level, with no connection to plastic pollution or environmental health.
Development of microfluidic device to monitor the contamination in drinking water using impedance spectroscopy
Researchers developed a microfluidic device using electrical impedance spectroscopy to detect and monitor microplastic particles in drinking water. The device aimed to provide a real-time, sensitive method for MP contamination monitoring at the point of use.
A microfluidic approach for label-free identification of small-sized microplastics in seawater
Researchers developed a microfluidic approach for label-free identification of small microplastics in seawater, using impedance-based detection to distinguish different polymer types without chemical labeling, enabling faster and more practical environmental monitoring.
Design and Development of an Advanced Sensor Prototype for the Detection of Microplastics
Researchers designed and developed an advanced sensor prototype for detecting microplastics in water, combining spectroscopic and signal processing technologies into a portable device. The prototype demonstrated accurate microplastic identification across multiple polymer types in field conditions.
Sub-6 GHz Microwave Sensor Targeting Microplastic Detection
Researchers designed an enhanced sub-6 GHz microwave sensor for low-cost microplastic detection by modifying sensor geometry to better utilize the bandwidth of portable microwave vector network analyzers. Electromagnetic simulations and experimental measurements validated the redesigned sensor, which calibrates resonant frequency as a function of effective permittivity to quantify microplastic concentrations in water.
Microfluidic Sensors for Micropollutant Detection in Environmental Matrices: Recent Advances and Prospects
This review covers advances in tiny sensor devices called microfluidic sensors that can detect trace amounts of pollutants including microplastics in water and environmental samples. Better detection tools matter for human health because they enable faster, more accurate monitoring of microplastic contamination in drinking water and food sources.
Comparative Analysis of Sub-6 GHz Microwave Sensors Suitable for Low-Cost In-Situ Microplastic Detection
This engineering paper compares the performance of several microwave resonator sensor designs for detecting microplastics in water, motivated by the growing availability of low-cost handheld instruments. Laboratory tests showed meaningful differences in sensitivity between sensor geometries, with one design showing the highest relative frequency shift in response to a nylon sample. While purely technical, such sensor development work is an important step toward affordable, portable microplastic monitoring tools that could be deployed in rivers, tap water systems, or food processing facilities.