We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Papers
61,005 resultsShowing papers similar to Polystyrene nanosized dots: structure and optical properties
ClearEffect of UV-exposure on size, morphology, and chemical structure of polystyrene nanospheres in suspension
Researchers investigated how UV exposure changes the size, morphology, and chemical structure of polystyrene nanospheres in suspension, simulating environmental weathering of nanoplastics. The study characterized how UV aging alters particle properties in ways relevant to their biological and environmental fate.
RefractiveIndex of Benchmark Polystyrene Nanoplasticsby Optical Modeling of UV–Vis Spectra
Researchers measured UV-visible spectra of polystyrene nanobeads deposited on sapphire substrates and applied a new optical model based on Mie theory to determine the refractive index of polystyrene nanoplastics below 1 micrometre, bridging a critical gap in the optical characterisation of nanoplastic particles.
Preparation of Polystyrene Nanoparticles with Environmental Relevance Using a Gradual Degradation Method.
Researchers prepared polystyrene nanoparticles of environmental relevance using a gradual degradation method that simulates natural weathering conditions, finding that nanofragment size evolved dynamically from below 250 nm at 3 days to 300-500 nm at 6 days before forming two sub-200 nm peaks at 9 days.
Fluorescent nanoplastics: What steps are needed towards a representative toolkit?
This review critically examines strategies for creating and using fluorescent nanoplastics in research, noting that commonly used commercial polystyrene beads are not representative of environmental nanoplastics. The study recommends alternative approaches for producing more realistic fluorescent model particles and provides a roadmap to help researchers select appropriate methods for their specific applications.
Preparation of environmentally relevant nanoplastics (e-NPs), benefit for fate, behavior and ecotoxicology studies
Researchers developed a method to produce environmentally relevant model nanoplastics by extracting particles from weathered plastic debris collected from the North Pacific garbage patch through agitation, sonication, and sequential filtration. The resulting nanoplastics were characterized using pyrolysis-GCMS, ATR-FTIR, and potentiometric titrations, showing mainly anisotropic particle shapes with surface properties closer to real environmental nanoplastics than commercial polystyrene beads.
Refractive Index of Benchmark Polystyrene Nanoplastics by Optical Modeling of UV–Vis Spectra
The refractive index of benchmark polystyrene nanoplastics was precisely measured using optical methods, providing a fundamental physical parameter needed for accurate optical detection and sizing of nanoplastics. Reliable optical constants for nanoplastics improve the accuracy of light-scattering-based detection instruments.
The production and characterisation of nanoplastic reference material: optimization and method development
Researchers optimized non-solvent phase separation methods using xylene, toluene, and phenol as solvents to produce nanoplastic reference materials from polyethylene, polypropylene, polyethylene terephthalate, and polystyrene — polymer types more environmentally representative than commonly used commercial polystyrene nanoparticles. They characterized the produced particles by dynamic light scattering, scanning electron microscopy, FTIR, and Raman spectroscopy, finding predominantly irregular fragment morphologies that more closely resemble environmentally occurring nanoplastics.
Defining the size ranges of polystyrene nanoplastics according to their ability to cross biological barriers
Researchers systematically examined polystyrene nanoplastics of different sizes to define the size ranges at which they can cross biological barriers, providing a more precise definition of nanoplastic dimensions relevant to toxicological assessment.
Localisation and identification of polystyrene particles in tissue sections using Raman spectroscopic imaging
Researchers developed a Raman spectroscopic imaging method to localize and identify polystyrene microplastic particles directly within tissue sections, enabling in-situ detection without fluorescent labeling and making environmental sample analysis feasible.
Single-Particle Analysis of the Photodegradation of Submicron Polystyrene Particles Using Infrared Photothermal Heterodyne Imaging.
Researchers used a new infrared imaging technique to observe how submicron polystyrene particles physically and chemically degrade under UV light, finding significant chemical changes within just 6 hours. This is one of the first methods capable of tracking photodegradation of very small plastic particles, improving our understanding of how nanoplastics form and age in the environment.
Correlation of refractive index to morphology for polystyrene nanospheres by optical modelling of UV-VIS spectra
Researchers developed an optical modelling approach using UV-VIS spectroscopy to determine the complex refractive index (RI) of polystyrene nanospheres and correlate it to particle morphology. The study bridged two key gaps in RI-morphology characterization: sizes below 1 micrometer and wavelengths below 400 nm, providing reference data critical for monitoring nanoplastics in environmental samples.
The crucial role of a protein corona in determining the aggregation kinetics and colloidal stability of polystyrene nanoplastics
Time-resolved dynamic light scattering was used to study how protein coronas — protein layers that form on nanoplastics in biological or environmental fluids — control the aggregation kinetics and colloidal stability of polystyrene nanoplastics. Protein identity and concentration profoundly shifted nanoplastic behavior, with implications for how these particles move and persist in natural water systems.
Effect of UV-exposure on size, morphology, and chemical structure of polystyrene nanospheres in suspension
Researchers studied how UV exposure alters the size, morphology, and chemical structure of polystyrene nanospheres in suspension, providing mechanistic insight into nanoplastic weathering. The results showed that UV irradiation progressively changes particle surface chemistry and size distribution in ways relevant to environmental fate and toxicity.
Correlative spectroscopy and microscopy analysis of micro- and nanoplastics in complex biological matrices
Researchers combined fluorescence microscopy, second harmonic generation imaging, and coherent Raman scattering to detect and map micro- and nanoplastics in lung cells, zebrafish, and mouse tissues. Polystyrene nanoplastics were found to cross the blood-brain barrier and accumulate in lipid-rich brain regions in animal models.
Polystyrene nanoplastics demonstrate high structural stability in vivo: A comparative study with silica nanoparticles via SERS tag labeling
Researchers developed a SERS tag labeling technique to track polystyrene nanoplastics in vivo, finding that nanoplastics demonstrate remarkably high structural stability in organisms compared to silica nanoparticles, which degraded more readily.
Unveiling the Environmental Characteristics of Sub-1000-nm Nanoplastics: A Comprehensive Review of the Preparation Methods for Nanoplastic Model Samples
This review addresses the challenge of creating realistic nanoplastic samples for lab research, since most studies have only used polystyrene spheres that do not represent the diverse shapes and types of nanoplastics found in the real environment. Better lab models are essential for accurately understanding the health risks these tiny plastic particles pose to humans.
Direct Nanoplastics Detection Below the Diffraction Limit Using Micro Raman
Researchers demonstrated that micro-Raman spectroscopy can directly detect polystyrene nanoplastic particles as small as 20 nm — far below the normal diffraction limit. This advances analytical capabilities for detecting the smallest nanoplastic particles in environmental samples.
Polarization transmission characteristics of polystyrene microplastics in aqueous environments
This study investigated how polarized light interacts with polystyrene microplastic particles suspended in water. While primarily a detection methods paper, it advances techniques for identifying microplastics in water and biological fluids like blood and urine, which is essential for accurately measuring human exposure levels.
Correlative spectroscopy and microscopy analysis of micro- and nanoplastics in complex biological matrices
Researchers combined fluorescence, second harmonic generation, and coherent Raman scattering microscopy in a single instrument to image micro- and nanoplastics in lung cells, zebrafish, and mouse tissues. Polystyrene nanoplastics crossed the blood-brain barrier and accumulated in lipid-rich brain regions in mouse models.
Raman spectra characterization of size-dependent aggregation and dispersion of polystyrene particles in aquatic environments.
This study used Raman spectroscopy to examine how the presence of salt, proteins, and organic matter influences the aggregation and dispersion of polystyrene nanoplastics in water. The findings show that environmental conditions significantly alter nanoplastic behavior and can complicate their detection, which has implications for understanding how nanoplastics move through aquatic environments.
Nanoplastics in the oceans: Theory, experimental evidence and real world
Researchers critically review over 200 studies on nanoplastic pollution — focusing predominantly on polystyrene — synthesizing knowledge on how nanoplastics form from polymer degradation, accumulate in seawater, and affect organisms in controlled conditions, while identifying key methodological standards needed for reliable ecotoxicological assessments.
Structural Compactness Governs the Environmental Fate of Polystyrene Nanoplastics: Reaggregation Mechanisms in Laboratory-Scale Aquatic Systems.
Scientists studied how tiny plastic particles from polystyrene (smaller than the width of a human hair) behave in water under different conditions like saltiness and water movement. They found that these plastic particles can break apart and stick back together, staying suspended in water for long periods and traveling far distances through rivers and oceans. This matters because it means these microscopic plastics could spread widely through water systems and potentially end up in our drinking water and food chain.
Distinctive impact of polystyrene nano-spherules as an emergent pollutant toward the environment
Researchers assessed polystyrene nanosphere toxicity to marine crustaceans and human blood cells, finding significant aggregation in seawater, lethal concentrations for brine shrimp (Artemia salina) and lymphocytes at microgram-per-milliliter levels, and evidence of genotoxicity and oxidative stress damage, establishing these particles as an emerging environmental and health hazard.
Influence of particle characteristics, heating temperature and time on the pyrolysis product distributions of polystyrene micro- and nano-plastics
Researchers systematically evaluated how pyrolysis temperature, heating time, particle size, and mass influence the decomposition products of polystyrene micro- and nanoplastics during pyrolysis-GC/MS analysis, providing critical guidance for improving the accuracy of environmental microplastic detection methods.