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Particle-in-Molybdenum Disulfide-Coated Cavity Structure with a Raman Internal Standard for Sensitive Raman Detection of Water Contaminants from Ions to <300 nm Nanoplastics
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This study investigated the distribution of microplastics in sediments and water of a coastal lagoon in southern Europe, finding higher concentrations near urban drainage inputs. Fibers and fragments dominated, with polyester and polyethylene being the most frequently identified polymers.
To develop a universal and precise detection strategy that can be applied to water contaminants of various sizes, we designed a particle-in-MoS2 coated cavity structure of AAO/MoS2/Ag with a Raman internal standard. This modified particle-in-cavity structure not only successfully integrates both "surface hot spots" and "volume hot spots" via dressing and manipulating the cascaded optical-field mode inside the cavity but also introduces the chemical enhancement and internal standard attribute of MoS2. Because of its unique three-dimensional structure, AAO/MoS2/Ag accurately detects water contaminants of various sizes from ions to nanoplastics (<300 nm) for the first time. This work proposes a novel and universal surface-enhanced Raman scattering strategy for detecting multiple-size water contaminants and demonstrates the potential to build a security line in early warning systems for the prevention of water pollution.
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Quantitative analysis of microplastics in water by Raman spectroscopy: influence of microplastic concentration on Raman scattering intensities
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Researchers investigated quantitative Raman spectroscopy for detecting microplastics directly in water, finding that Raman scattering intensities varied with concentration for both PVC spheres (40-100 um) and PE spheres (40-48 um) dispersed in de-ionized water at 0.1-1.0 wt%.
Identification of Microplastics Using a Custom Built Micro-Raman Spectrometer
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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.
Prevalence of small-sized microplastics in coastal sediments detected by multipoint confocal micro-Raman spectrum scanning
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Researchers developed a new micro-Raman spectrum scanning method to detect small-sized microplastics in coastal sediments, revealing that particles under 50 micrometers are the most prevalent and commonly overlooked by standard techniques.
Uncertainties in the Laboratory Analysis of Microplastics in Sewage Sludge : Insights into the Physicochemical Properties of Polymers and the Use of Raman Spectroscopy
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Researchers examined sources of uncertainty in microplastic analysis from sewage sludge, finding that the physicochemical properties of different polymers introduce variability in Raman spectroscopy measurements and identifying key factors affecting method reliability for regulatory monitoring.
How to Identify and Quantify Microplastics and Nanoplastics Using Raman Imaging?
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This paper reviews advances in Raman imaging as a method for identifying and quantifying microplastics and nanoplastics in environmental samples, discussing current protocols, analytical challenges, and the need for standardization.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.