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Tier 2
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Original research — experimental, observational, or case-control study. Direct primary evidence.
Detection Methods
Environmental Sources
Nanoplastics
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Nanoplastic Analysis by Online Coupling of Raman Microscopy and Field-Flow Fractionation Enabled by Optical Tweezers
Analytical Chemistry2020
151 citations
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Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Score: 45
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0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Christian Schwaferts,
Christian Schwaferts,
Christian Schwaferts,
Christian Schwaferts,
Christian Schwaferts,
Christian Schwaferts,
Reinhard Nießner,
Natalia P. Ivleva
Natalia P. Ivleva
Natalia P. Ivleva
Vanessa Sogne,
Martin Elsner,
Natalia P. Ivleva
Vanessa Sogne,
Reinhard Nießner,
Natalia P. Ivleva
Martin Elsner,
Natalia P. Ivleva
Martin Elsner,
Florian Meier,
Natalia P. Ivleva
Natalia P. Ivleva
Natalia P. Ivleva
Martin Elsner,
Martin Elsner,
Reinhard Nießner,
Reinhard Nießner,
Roland Welz,
Roland Welz,
Natalia P. Ivleva
Natalia P. Ivleva
Christian Schwaferts,
Martin Elsner,
Natalia P. Ivleva
Natalia P. Ivleva
Martin Elsner,
Natalia P. Ivleva
Natalia P. Ivleva
Martin Elsner,
Reinhard Nießner,
Reinhard Nießner,
Reinhard Nießner,
Natalia P. Ivleva
Christian Schwaferts,
Reinhard Nießner,
Florian Meier,
Reinhard Nießner,
Natalia P. Ivleva
Thorsten Klein,
Natalia P. Ivleva
Reinhard Nießner,
Martin Elsner,
Reinhard Nießner,
Natalia P. Ivleva
Natalia P. Ivleva
Thorsten Klein,
Florian Meier,
Reinhard Nießner,
Florian Meier,
Natalia P. Ivleva
Natalia P. Ivleva
Florian Meier,
Florian Meier,
Natalia P. Ivleva
Natalia P. Ivleva
Florian Meier,
Natalia P. Ivleva
Florian Meier,
Martin Elsner,
Reinhard Nießner,
Reinhard Nießner,
Natalia P. Ivleva
Florian Meier,
Natalia P. Ivleva
Natalia P. Ivleva
Natalia P. Ivleva
Martin Elsner,
Martin Elsner,
Roland Welz,
Natalia P. Ivleva
Florian Meier,
Natalia P. Ivleva
Martin Elsner,
Martin Elsner,
Roland Welz,
Natalia P. Ivleva
Natalia P. Ivleva
Roland Welz,
Florian Meier,
Roland Welz,
Natalia P. Ivleva
Martin Elsner,
Natalia P. Ivleva
Natalia P. Ivleva
Thorsten Klein,
Thorsten Klein,
Thorsten Klein,
Natalia P. Ivleva
Thorsten Klein,
Natalia P. Ivleva
Summary
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.
Nanoplastic pollution is an emerging environmental concern, but current analytical approaches are facing limitations in this size range. However, the coupling of nanoparticle separation with chemical characterization bears potential to close this gap. Here, we realize the hyphenation of particle separation/characterization (field-flow fractionation (FFF), UV, and multiangle light scattering) with subsequent chemical identification by online Raman microspectroscopy (RM). The problem of low Raman scattering was overcome by trapping particles with 2D optical tweezers. This setup enabled RM to identify particles of different materials (polymers and inorganic) in the size range from 200 nm to 5 μm, with concentrations in the order of 1 mg/L (10<sup>9</sup> particles L<sup>-1</sup>). The hyphenation was realized for asymmetric flow FFF and centrifugal FFF, which separate particles on the basis of different properties. This technique shows potential for application in nanoplastic analysis, as well as many other fields of nanomaterial characterization.