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Papers
61,005 resultsShowing papers similar to Measurement of Submicron Particle Size Using Scattering Angle-Corrected Polarization Difference with High Angular Resolution
ClearRapidly Measuring Scattered Polarization Parameters of the Individual Suspended Particle with Continuously Large Angular Range
A method was developed to rapidly measure light scattering parameters of individual suspended particles across a wide angular range in a single measurement. The technique was validated using silica microspheres and demonstrated high measurement speed. Rapid characterization of particle optical properties has applications in monitoring suspended sediment, plankton, and microplastics in aquatic environments.
Rapid classification of micro-particles using multi-angle dynamic light scatting and machine learning approach
Researchers developed a prototype instrument using multi-angle dynamic light scattering combined with machine learning to enable rapid classification of micro-particles, demonstrating its potential for applications in biomedical diagnostics and materials science. The approach achieved accurate particle differentiation without requiring complex sample preparation, offering a faster alternative to conventional particle characterization methods.
Sizing individual dielectric nanoparticles with quantitative differential interference contrast microscopy
Researchers developed a quantitative differential interference contrast (DIC) microscopy method to measure individual dielectric nanoparticle sizes with high accuracy, using polystyrene beads as standards to determine radii within a few nanometers, demonstrating sensitivity potentially reaching 1.8 nm and applying the technique to nanodiamond sizing and nanoplastic detection.
Advancing the Understanding of Microplastic Weathering: Insights from a Novel Polarized Light Scattering Approach
Researchers introduced a polarized light scattering technique to rapidly characterize microplastic weathering, which alters the physical and chemical properties of particles and affects their environmental behavior. The approach provides high-throughput, real-time insights into weathering-induced surface and structural changes that are difficult to capture with conventional methods.
How small a nanoplastic can be? A discussion on the size of this ubiquitous pollutant
Researchers explored the question of how small nanoplastic particles can actually be, highlighting the lack of standardized size definitions for this emerging pollutant. They examined the analytical challenges involved in detecting and characterizing nanoplastics at the smallest scales. The study calls for a clearer framework around nanoplastic size boundaries, since particle size is a key factor influencing toxicity and environmental behavior.
In-situ Detection Method for Microplastics in Water by Polarized Light Scattering
Researchers developed an in-situ detection method for microplastics in water using polarized light scattering at 120 degrees, enabling real-time measurement of individual particles without sample collection or laboratory processing.
Sub-10 nm Nanoparticle Detection Using Multi-Technique-Based Micro-Raman Spectroscopy
Researchers combined standard micro-Raman spectroscopy with atomic force microscopy to detect individual nanoparticles as small as 9 nm — a size range that until now required far more complex and time-consuming instruments. This advance matters for microplastic research because plastics continuously fragment into nanoplastics, and having accessible tools to characterise these ultra-small particles is essential for understanding their environmental distribution and biological uptake.
Quantitative size-resolved characterization of mRNA nanoparticles by in-line coupling of asymmetrical-flow field-flow fractionation with small angle X-ray scattering
Scientists developed an analytical method combining two techniques to precisely measure the size and structure of mRNA nanoparticles used in pharmaceuticals. The approach provides detailed quality data for nanoparticle-based medicines, which could improve the safety and consistency of mRNA vaccines and drug delivery systems.
Advanced Particle Size Analysis in High-Solid-Content Polymer Dispersions Using Photon Density Wave Spectroscopy
Not relevant to microplastics research; this paper develops a new spectroscopic method for measuring the size of polymer nanoparticles in concentrated industrial dispersions, focused on manufacturing quality control rather than environmental microplastic pollution.
Identification of Microplastics Using a Custom Built Micro-Raman Spectrometer
Researchers built a custom micro-Raman spectrometer and demonstrated its use for identifying microplastic polymer types in environmental samples, achieving sensitive and specific polymer identification at particle sizes down to a few micrometers.
Optical parameter sensing: sensitivity limits and the advantages of using spatial modes of light
This study explored how spatial light modes can improve precision and sensitivity in optical measurement systems beyond the limits of conventional techniques. Advanced optical sensing methods including those using spatial light modes are being applied to improve microplastic detection at very small particle sizes.
Raman Diffusion-Ordered Spectroscopy
Researchers combined Raman spectroscopy with diffusion-based size measurement to simultaneously identify and size molecules in a single experiment. This technique could be adapted to characterize nanoplastic particles by their chemical identity and size, both of which determine their biological behavior and toxicity.
Sub-picoliter Traceability of Microdroplet Gravimetry and Microscopy
Researchers developed an integrated approach combining gravimetry and microscopy for sub-picoliter measurement of individual microdroplets, enabling accurate volume determination that bridges the resolution gap between the two techniques and improving precision for microfluidic and droplet-based applications.
Effect of medium refractive index on microparticle characterization by optical scattering
Researchers investigated how the refractive index of the medium affects optical scattering measurements used to characterize microplastic particles, finding that medium choice significantly influences size estimation accuracy. Machine learning was applied to improve classification of particles under varying optical conditions.
Convenient Size Analysis of Nanoplastics on a Microelectrode
Researchers developed a microelectrode-based method for size analysis of nanoplastics in suspension, enabling convenient, rapid characterization without specialized nanoparticle tracking instruments. The method accurately measured particle size distributions down to the nanometer range and showed potential for integration into routine environmental monitoring workflows.
High-PrecisionRefractive Index-Based MicroparticleSorting Using Airy Beams
Researchers proposed an Airy beam-based optical sorting technique to separate microparticles by refractive index, enabling discrimination between particles of similar size but different composition. The method showed promise for identifying microplastic particles in complex mixtures and for medical diagnostic applications.
High-PrecisionRefractive Index-Based MicroparticleSorting Using Airy Beams
Researchers proposed an Airy beam-based optical sorting technique to separate microparticles by refractive index, enabling discrimination between particles of similar size but different composition. The method showed promise for identifying microplastic particles in complex mixtures and for medical diagnostic applications.
High-PrecisionRefractive Index-Based MicroparticleSorting Using Airy Beams
Researchers proposed an Airy beam-based optical sorting technique to separate microparticles by refractive index, enabling discrimination between particles of similar size but different composition. The method showed promise for identifying microplastic particles in complex mixtures and for medical diagnostic applications.
High-PrecisionRefractive Index-Based MicroparticleSorting Using Airy Beams
Researchers proposed an Airy beam-based optical sorting technique to separate microparticles by refractive index, enabling discrimination between particles of similar size but different composition. The method showed promise for identifying microplastic particles in complex mixtures and for medical diagnostic applications.
High-PrecisionRefractive Index-Based MicroparticleSorting Using Airy Beams
Researchers proposed an Airy beam-based optical sorting technique to separate microparticles by refractive index, enabling discrimination between particles of similar size but different composition. The method showed promise for identifying microplastic particles in complex mixtures and for medical diagnostic applications.
High-PrecisionRefractive Index-Based MicroparticleSorting Using Airy Beams
Researchers proposed an Airy beam-based optical sorting technique to separate microparticles by refractive index, enabling discrimination between particles of similar size but different composition. The method showed promise for identifying microplastic particles in complex mixtures and for medical diagnostic applications.
High-PrecisionRefractive Index-Based MicroparticleSorting Using Airy Beams
Researchers proposed an Airy beam-based optical sorting technique to separate microparticles by refractive index, enabling discrimination between particles of similar size but different composition. The method showed promise for identifying microplastic particles in complex mixtures and for medical diagnostic applications.
Asymmetrical flow field flow fractionation methods to characterize submicron particles: application to carbon-based aggregates and nanoplastics
Researchers developed and validated an asymmetrical flow field-flow fractionation (AF4) strategy capable of rapidly sizing and separating submicron particles — including nanoplastics — across the full colloidal range from 10 to 800 nm using a single programmed method with four high-resolution sub-fractionation windows.
Determination of particle number concentration for biological particles using AF4-MALS: Dependencies on light scattering model and refractive index
Researchers investigated how light scattering models and particle refractive index assumptions affect particle number concentration determinations for biological particles using asymmetrical flow field-flow fractionation with multiangle light scattering (AF4-MALS). They found that the choice of scattering model and refractive index values introduces quantifiable bias in concentration estimates, with implications for standardizing bioparticle characterization across laboratories.