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61,005 resultsShowing papers similar to The right excitation wavelength for microplastics detection via photoluminescence
ClearExploring the potential of photoluminescence spectroscopy in combination with Nile Red staining for microplastic detection
Researchers explored photoluminescence spectroscopy combined with Nile Red staining as a cost- and time-efficient detection method for microplastics, evaluating improvements to existing fluorescence microscopy approaches for more reliable global monitoring of microplastic abundance.
Detection and Characterisation of Micro- and Nano-plastics in Water using Optical Spectroscopy
This thesis explored photoluminescence spectroscopy as an alternative technique for detecting and characterizing micro- and nanoplastics in water, optimizing fluorescence excitation-emission features and comparing performance against conventional spectroscopic approaches.
Photoluminescence‐Based Techniques for the Detection of Micro‐ and Nanoplastics
This review examined photoluminescence-based techniques for detecting micro- and nanoplastics, evaluating fluorescent labeling and spectroscopic methods as promising approaches to address the challenge of identifying plastic particles at the smallest scales.
Identifying plastics with photoluminescence spectroscopy and machine learning
Researchers showed that combining photoluminescence spectroscopy (shining light on plastic and measuring what comes back) with machine learning can reliably identify different types of plastic materials. This low-cost, widely accessible approach could help scientists track and characterize plastic pollution in the environment at a global scale.
Exploring the Potential of Time-Resolved Photoluminescence Spectroscopy for the Detection of Plastics
Researchers tested time-resolved photoluminescence spectroscopy as a faster alternative to conventional Raman and FTIR spectroscopy for identifying plastic polymers. The technique showed promise for rapid plastic identification, which could speed up microplastic analysis in environmental samples.
Excitation–Emission Fluorescence Mapping Analysis of Microplastics That Are Typically Pollutants
Researchers introduced a two-dimensional fluorescence excitation-emission mapping method for identifying common microplastics including polystyrene, PET, and polypropylene. Unlike conventional fluorescence approaches that use a single excitation wavelength, this technique captures spectral fingerprints across a range of wavelengths for more reliable identification. The method offers a non-destructive, label-free alternative for detecting microplastic contamination.
Optical measurement technologies for detecting low levels of pollution and identifying microplastics in water
Researchers reviewed optical technologies for detecting and identifying microplastics in water, experimentally characterizing the fluorescence spectra of PE and PET microplastic samples under 365 nm excitation and identifying spectral bands enabling identification of different polymer types, then proposing a comprehensive hardware solution using a fluorescent probe for microplastic visualization.
A photoluminescence strategy for detection nanoplastics in water and biological imaging in cells and plants
Researchers developed a fluorescent probe that can rapidly detect nanoplastics in water samples down to very low concentrations. The probe works by binding to nanoplastic surfaces through electrical and chemical interactions, which causes it to glow, enabling both detection and visual tracking in cells and plant tissues. This tool could help scientists better monitor nanoplastic contamination in water and understand how these tiny particles move through living organisms.
Polymer Sorting Through Fluorescence Spectra
Identifying which type of plastic a particle is made of is a key step in microplastics research, and this study explored using fluorescence spectroscopy as a faster, cheaper alternative to standard methods. By exposing six common polymers to different light wavelengths and analyzing their fluorescence signatures, the researchers found combinations of wavelengths that could reliably distinguish between plastics like polystyrene, polyamide, and polypropylene. This technique could streamline polymer identification in large-scale environmental monitoring programs.
Using autofluorescence for microplastic detection – Heat treatment increases the autofluorescence of microplastics1
Researchers found that heating plastic particles increases their natural fluorescence, making microplastics much easier to detect under a microscope without chemically altering them. This simple heat treatment offers a cost-effective method to improve microplastic detection in environmental and biological samples.
Single particle identification and automated classification of small (<10µm) microplastics using cathodoluminescence
Researchers used cathodoluminescence to detect and automatically classify small microplastics under 10 µm — a size range missed by most optical methods — demonstrating a new analytical approach for characterizing fine particle contamination in environmental and biological samples.
Identification of different plastic types and natural materials from terrestrial environments using fluorescence lifetime imaging microscopy
Researchers tested a microscopy technique called fluorescence lifetime imaging (FD-FLIM) to quickly identify and distinguish microplastics from natural materials like soil particles, finding that a 445 nm light excitation was best for telling plastic types apart — potentially offering a faster alternative to slow, labor-intensive microplastic analysis methods.
In Situ Fluorescent Illumination of Microplastics in Water Utilizing a Combination of Dye/Surfactant and Quenching Techniques
Researchers developed an in situ fluorescent microplastic detection method using a nonpolar dye combined with surfactant to form nanoscale dye particles that selectively adsorb onto and penetrate plastic polymer matrices in water, then quenched free dye fluorescence using aniline to enable direct visualization of stained microplastics without filtration.
A Portable Optical Sensor for Microplastic Detection: Development and Calibration
Researchers built a portable, low-cost optical sensor prototype designed to detect microplastics by shining multiple wavelengths of light through water samples. The device measures how different plastic particles absorb and scatter light, producing color spectra that can help identify microplastics. The sensor offers an affordable field-deployable option for environmental monitoring, with potential future improvements using machine learning for automated identification.
Identification of microplastics in wastewater samples by means of polarized light optical microscopy
Scientists tested polarized light optical microscopy as a rapid method for identifying microplastics in wastewater samples, finding it could distinguish synthetic polymer particles from natural debris based on their optical properties without requiring expensive spectroscopy equipment.
Low‐cost microplastic visualization in feeding experiments using an ultraviolet light‐emitting flashlight
Researchers demonstrated a low-cost method using UV flashlights to visualize fluorescent-dyed microplastics during feeding experiments, making it easier to track whether aquatic organisms ingest plastic particles without expensive laboratory equipment. This accessible technique could help more researchers study microplastic ingestion across diverse species.
Investigation of optical properties of microplastics
Researchers collected sand from Los Angeles beaches and studied the optical properties of naturally occurring microplastics using a laser-tweezer setup. The resulting database of optical characteristics is intended to help develop tools for detecting microplastics and studying their interactions with ocean microorganisms.
Fast and portable fluorescence lifetime analysis for early warning detection of micro- and nanoplastics in water
Researchers developed a portable fluorescence-based system that can detect micro- and nanoplastics in water without any sample preparation or labeling. The method works by measuring the natural fluorescence lifetime of plastic particles using a pulsed laser, achieving detection limits as low as 0.01 mg/mL. The study presents a promising early-warning tool for rapid, on-site monitoring of plastic contamination in water sources.
Laser-based spectroscopic techniques: A novel approach for distinguishing aging processes and types of microplastics
Researchers applied laser-based spectroscopic techniques as a novel approach to distinguish different aging processes and plastic types in microplastics, examining how biotic and abiotic degradation factors alter spectral signatures across particles ranging from 1 to 1000 microns.
Novel Pyrolysis-Assisted Cataluminescence System for Fingerprint Discrimination of Various Microplastics
Scientists developed a fast new sensor system that can identify and distinguish between seven different types of microplastics in just seconds by heating them and analyzing the light they produce. Better detection tools like this are important because accurately identifying microplastics in the environment and in human tissues is a key step toward understanding and reducing our exposure.
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.
Frequency domain fluorescence lifetime imaging microscopy: A new method to directly identify microplastics in water.
Researchers evaluated frequency-domain fluorescence lifetime imaging microscopy (FD-FLIM) as a method to identify ABS, PC, PET, PS, and PVC granulates directly in a 1 cm water layer without filtration or drying. The study found that all five polymer types could be unambiguously identified by their fluorescence lifetimes, establishing FD-FLIM as a promising rapid label-free technique for direct microplastic detection in aqueous samples.
Coumarin 6 staining method to detect microplastics
Researchers developed a fluorescence staining method using coumarin 6 dye to detect microplastics, offering a simpler and lower-cost detection approach compared to spectroscopic methods while maintaining adequate specificity for identifying plastic particles in environmental samples.
Applications of Fluorescence Technology for Rapid Identification of Marine Plastic Pollution
This review examines how fluorescence-based technologies can be used to rapidly identify and classify plastic pollution in marine environments. Researchers found that analyzing differences in fluorescence lifetimes and intensities of different plastics, combined with various fluorescent dyes, enables effective detection of microplastics. The study highlights fluorescence technology as a promising low-cost tool for monitoring ocean plastic contamination.