Redoy Gazi Shuvo et. al., Macromol. Rapid. Commun., 2026, e00839, 47, 4, https://doi.org/10.1002/marc.202500839
Detecting nanoplastic particles in environmental samples and biological tissues remains a significant challenge, especially in view of new emerging polymers, not yet present in the environment. We present a method for producing labeled nanoparticles (NP/MP) of poly(ethylene terephthalate) (PET) and poly(ethylene furanoate) (PEF), tagged with Alexa Fluor 633 or Alexa Fluor 647 with a focus on stabilizer-free particles with zeta-potentials from -5 to -50 mV. Fluorescence spectroscopy of the Alexa-dye-labelled particles confirmed the successful incorporation of the Alexa dyes now further monitoring the biological profiles of the PEF-MP/NPs in the future. sSNOM (near field imaging) could identify the nano-particles by direct imaging.