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20 resultsShowing papers similar to Direct Nanoplastics Detection Below the Diffraction Limit Using Micro Raman
ClearQuantitative and sensitive analysis of polystyrene nanoplastics down to 50 nm by surface-enhanced Raman spectroscopy in water
Researchers developed a highly sensitive method using surface-enhanced Raman spectroscopy to detect and quantify polystyrene nanoplastics as small as 50 nanometers in water samples. The technique achieved detection limits far below what conventional methods can measure, enabling the identification of nanoplastics at environmentally relevant concentrations. This advancement addresses a critical gap in nanoplastic monitoring, as most existing methods cannot reliably detect particles at such small sizes.
Overcoming resolution limitations: Spectroscopy of sub-30 nm nanoplastics
Researchers developed a multi-technique approach combining standard micro-Raman spectroscopy with atomic force microscopy to characterize nanoplastics as small as 25 nm, achieving a mass detection limit of 8.6 attograms and demonstrating the capability to obtain single-particle spectra from sub-30 nm polystyrene nanoparticles.
Overcoming resolution limitations: Spectroscopy of sub-30 nm nanoplastics
Researchers developed a multi-technique approach combining standard micro-Raman spectroscopy with atomic force microscopy to characterize nanoplastics as small as 25 nm, achieving a mass detection limit of 8.6 attograms and demonstrating the capability to obtain single-particle spectra from sub-30 nm polystyrene nanoparticles.
Identification and visualisation of microplastics/nanoplastics by Raman imaging (i): Down to 100 nm
Researchers developed an advanced Raman imaging technique capable of identifying and visualizing nanoplastics down to 100 nanometers in size. The study addressed a key analytical gap, as nanoplastic research has been limited by the lack of effective characterization methods, and the new approach offers a way to detect these extremely small particles that may pose greater environmental risks due to their high surface area.
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.
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.
Identification and visualisation of microplastics/ nanoplastics by Raman imaging (ii): Smaller than the diffraction limit of laser?
Researchers examined whether confocal Raman microscopy can identify and visualize nanoplastics smaller than the diffraction limit of the laser, analyzing the lateral intensity distribution of Raman signals from nanoplastics ranging from approximately 30 to 600 nm in diameter. The study found that while imaging resolution is limited by diffraction, chemical identification of sub-diffraction-limit nanoplastics remains possible.
Surface-enhanced Raman spectroscopy for the detection of microplastics
Researchers developed a surface-enhanced Raman spectroscopy method using gold nanoparticles to detect polystyrene microplastics at concentrations as low as 6.5 micrograms per milliliter, offering a new tool for detecting sub-micron plastic pollutants in water.
Identification of polystyrene nanoplastics using surface enhanced Raman spectroscopy
Researchers demonstrated for the first time that surface-enhanced Raman spectroscopy (SERS) using silver nanoparticles can identify polystyrene nanoplastics as small as 50 nm in real water samples, providing a rapid detection method that bypasses conventional sample preparation and could advance environmental monitoring of nanoplastics previously invisible to standard analytical techniques.
Surface-Enhanced Raman Spectroscopy Facilitates the Detection of Microplastics <1 μm in the Environment
Researchers developed a method using surface-enhanced Raman spectroscopy to detect and identify individual microplastic particles smaller than one micrometer. This technique addresses a major gap in environmental monitoring, since most current methods cannot reliably detect the smallest microplastics that may pose the greatest risk due to their ability to enter cells and tissues.
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.
Breaking the Size Barrier: SERS-Based Ultrasensitive Detection and Quantification of Polystyrene Plastics in Real Water Samples
Researchers developed a surface-enhanced Raman spectroscopy (SERS) method capable of detecting and quantifying polystyrene plastic particles of various sizes — including nanoplastics — in real environmental water samples at ultrasensitive concentrations.
Nanowell-enhanced Raman spectroscopy enables the visualization and quantification of nanoplastics in the environment
A nanowell-enhanced Raman spectroscopy substrate was fabricated using the coffee ring effect to capture and concentrate nanoplastics, enabling direct visualization and detection of single polystyrene nanoplastics as small as 200 nm in environmental samples.
Direct Detection of Polystyrene Nanoplastics in Water Using High-sensitivity Surface-enhanced Raman Scattering with Ag Nanoarray Substrates
Researchers developed a fast, sensitive detection method using silver nanostructures and laser light scattering (surface-enhanced Raman scattering) to identify polystyrene nanoplastics in water at concentrations as low as 10 micrograms per milliliter, offering a practical tool for monitoring nanoplastic contamination in real-world water sources.
Detection of microplastics and nanoplastics: Are Raman tweezers and enhanced Raman methods the solution for sub 20 μm particles?
Raman tweezers — devices that use a laser beam to trap and analyze individual particles — combined with plasmonic enhancement techniques can detect and characterize nanoplastics and microplastics smaller than 20 µm, a size range that defeats most conventional filtration-based detection methods. Improving detection sensitivity for the smallest plastic particles is critical because nanoplastics are thought to be the most biologically active fraction, capable of crossing cell membranes and accumulating in tissues.
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.
Linear Regression Analysis of Super Microplastics Using Probe Raman Spectrometer
Researchers analyzed polystyrene microparticles using a probe Raman spectrometer to assess the feasibility of detecting super-microplastics, finding that analyzing particles on a silicon platform markedly improved the limit of detection compared to standard conditions.
Application of raman micro-spectroscopy for quantitative microplastics analysis
This review examines the application of Raman microspectroscopy for quantitative microplastic analysis, emphasizing the technique's ability to detect particles down to 1 micron - the smallest size range posing the highest environmental and health risk. The authors highlight Raman microspectroscopy's advantages over other methods for measuring microplastic concentrations across diverse environmental matrices.
Fast detection and 3D imaging of nanoplastics and microplastics by stimulated Raman scattering microscopy
Researchers developed a fast imaging technique using stimulated Raman scattering microscopy to detect and create 3D maps of nanoplastics and microplastics at the single-particle level. The method can identify plastic particles as small as 100 nanometers and distinguish between different polymer types without the need for dyes or labels. This technology could help scientists more accurately track tiny plastic particles in environmental and biological samples.
Strategies and Challenges of Identifying Nanoplastics in Environment by Surface-Enhanced Raman Spectroscopy
Researchers reviewed the use of surface-enhanced Raman spectroscopy (SERS) as a tool for detecting nanoplastics, which are plastic particles smaller than one micrometer. The study found that SERS offers high sensitivity for identifying individual nanoparticles, but significant challenges remain in applying this technique to complex environmental samples. The review outlines strategies for improving SERS-based nanoplastic detection to better assess environmental and health risks.