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Papers
61,005 resultsShowing papers similar to Optical Extraction of Single Microplastics Followed by Online Molecular and Elemental Characterization
ClearTrapping and chemical characterization of sub-microplastics using Raman optical tweezers with machine learning
Researchers combined optical tweezers Raman spectroscopy with machine learning-driven PCA to identify and classify individual sub-micron plastic particles (PE, PP, PS) from environmental matrices. By analyzing 35 Raman spectra, the platform demonstrated accurate single-particle identification without complex sample preparation.
Investigation of single sea microplastics by optical and Raman tweezers
Researchers investigated individual seawater microplastic particles using optical and Raman tweezers, applying laser-based trapping techniques to enable contactless manipulation and chemical characterization of single microplastic particles collected directly from the marine environment.
Investigation of single sea microplastics by optical and Raman tweezers
Researchers investigated individual seawater microplastic particles using optical and Raman tweezers, applying laser-based trapping techniques to enable contactless manipulation and chemical characterization of single microplastic particles collected directly from the marine environment.
Optical and Raman tweezers for the manipulation and characterization of cosmic dust and sea microplastics
Researchers used optical and Raman laser tweezers to manipulate and identify individual micro- and nanoplastic particles and cosmic dust grains. The technique can characterize particle composition and fragmentation behavior, offering a powerful new approach for studying how microplastics break down in the ocean.
Raman Tweezers for Small Microplastics and Nanoplastics Identification in Seawater
Researchers used Raman tweezers - optical tweezers combined with Raman spectroscopy - to capture and chemically identify individual small microplastic and nanoplastic particles in seawater samples in situ. This novel technique could enable real-time identification of the smallest plastic particles in marine environments, filling a critical gap in nano- and micro-plastic detection.
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.
Detection and analysis of microplastics in the subtropical ocean of Okinawa using micro-Raman Optical Tweezers
Micro-Raman optical tweezers were used to isolate and identify individual microplastic particles from seawater samples collected off Okinawa, demonstrating that this single-particle technique can characterize polymer composition of very small particles that are difficult to detect with conventional methods.
Microplastic identification using Raman microsocpy
Researchers developed and implemented a Raman spectroscopy system for rapid detection and identification of microplastic particles on substrates. The system enables efficient chemical characterization of microplastics found across diverse environmental matrices including ocean, lakes, soil, beach sediment, and human blood.
Visualization and characterisation of microplastics in aquatic environment using a home-built micro-Raman spectroscopic set up
Researchers built an affordable micro-Raman spectroscopy system capable of identifying microplastics in water samples, offering a low-cost alternative to expensive commercial equipment. The system could visualize, measure, and chemically identify different types of microplastic particles. This kind of accessible detection technology is important, especially for developing countries, because widespread monitoring of microplastic pollution in water sources is essential for protecting public health.
Laser-based techniques: Novel tools for the identification and characterization of aged microplastics with developed biofilm
Researchers applied laser-based analytical techniques including Raman and LIBS spectroscopy to detect and characterize microplastics covered with environmental biofilm. The methods successfully identified five polymer types under real-world conditions without requiring biofilm removal, avoiding the particle loss associated with conventional pre-treatment steps.
Flow Plastometry of Microplastics Using Optical Line Tweezers
Researchers developed a novel system using Raman spectroscopy combined with optical line tweezers to simultaneously analyze the shape and chemical composition of microplastics flowing through a channel. The technique can capture and characterize particles as small as 500 nanometers, offering a potential tool for real-time monitoring of microplastics in water environments.
Optofluidic Force Induction Meets Raman Spectroscopy and Inductively Coupled Plasma-Mass Spectrometry: A New Hyphenated Technique for Comprehensive and Complementary Characterizations of Single Particles
Researchers developed a new analytical technique that combines optical trapping, Raman spectroscopy, and mass spectrometry to characterize individual nanoparticles in a single measurement. The method can identify the chemical composition, elemental makeup, and size of particles one at a time. While demonstrated on engineered nanoparticles, this technology could eventually be applied to detect and characterize individual nanoplastic particles in environmental and biological samples.
Rapid MicroplasticDetection Using High-ThroughputScreening Raman Spectroscopy
Researchers developed a high-throughput screening Raman spectroscopy system for rapid microplastic detection, overcoming the traditional tradeoff between spatial resolution, field of view, and analytical throughput to enable faster identification of plastic particles across environmental samples with low concentrations.
Design of a confocal micro-Raman spectroscopy system and research on microplastics detection
Researchers built a custom confocal micro-Raman spectroscopy system designed to detect microplastics more cost-effectively than commercial instruments. The improved signal quality enables more accurate identification of plastic polymer types in environmental samples.
Complementary analysis of pristine, UV-aged and extracted microplastics using single particle ICP-MS and OF2i-Raman spectroscopy
Researchers evaluated two emerging techniques for analyzing individual microplastic particles: single particle ICP-MS for measuring carbon mass per particle, and a novel optofluidic force induction Raman spectroscopy method for identifying polymer type. When applied together to study UV degradation of nylon-6 and polyethylene, the techniques provided complementary information linking physical size changes to molecular structural alterations. The study demonstrates how combining these methods can improve detection and characterization of environmentally aged microplastics.
High-resolution, broad-spectral-range Raman measurement using a spatial heterodyne spectrometer with separate filters and multi-gratings
Researchers developed a spatial heterodyne Raman spectrometer with separate filters and multiple gratings that achieves high spectral resolution over a broad range in a single measurement, and demonstrated it can identify microplastics even in the presence of fluorescence interference. Better analytical tools like this are critical for accurately characterizing the types and quantities of microplastics in environmental samples.
Study on Rapid Recognition of Marine Microplastics Based on Raman Spectroscopy
Researchers developed a rapid identification system for marine microplastics using Raman spectroscopy, enabling quick determination of plastic type and size. Fast, accurate identification tools are critical for monitoring the growing problem of microplastic pollution in ocean environments.
Nanoplastic Analysis by Online Coupling of Raman Microscopy and Field-Flow Fractionation Enabled by Optical Tweezers
Researchers developed a new analytical technique for detecting nanoplastics by combining field-flow fractionation with online Raman microspectroscopy, using optical tweezers to trap particles and overcome weak scattering signals. The method successfully identified polymer and inorganic particles ranging from 200 nm to 5 micrometers at concentrations around 1 mg/L.
Microplastics detection and environmentally toxicity testing by multimodal optical metrology
Researchers developed a multimodal optical system combining fluorescence, Raman spectroscopy, and toxicity testing to detect and characterize microplastics in environmental samples. The system can simultaneously identify plastic types and assess their biological toxicity in a single workflow.
Using optimized particle imaging of micro-Raman to characterize microplastics in water samples
Researchers developed a micro-Raman automatic particle identification technique that can characterize microplastics in water samples up to 100 times faster than traditional point-by-point detection methods, while maintaining high precision for identifying polymer types, sizes, and morphologies.
Optical trapping studies of irregularly shaped microplastic particles
Researchers used optical tweezers coupled with Raman spectroscopy to characterize the trapping behavior of irregularly shaped microplastic particles from household plastics (PP, PET, HDPE) and beach-collected samples, building a database revealing how shape, composition, and size influence trapping stability.
Plasmonic nanostructures for environmental monitoring and/or biological applications
This study used optical tweezer micro-Raman spectroscopy to identify and size-classify microplastics from a Chinese lake, and developed a plasmonic nanostructure system for detecting nanoplastics. Better detection tools for both micro- and nano-scale plastic particles are essential for accurately assessing environmental contamination and human exposure.
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 between different aging processes and plastic types in microplastic particles, addressing the challenge of identifying weathered plastics that have undergone physical and chemical degradation in the environment.
Identification of microplastics using Raman spectroscopy: Latest developments and future prospects
This review summarizes the latest advances in using Raman spectroscopy to identify microplastics in environmental samples, highlighting improvements in speed, sensitivity, and the ability to characterize plastic type and surface chemistry.