NanoPlasticsDetect

The intensive use of plastic materials has given rise to an alarming pollution linked to the presence of micro- and nanoplastics. The latter have dimensions of less than 1 µm, making them an even greater threat to biodiversity and human health. While current analysis methods are limited to particles larger than 5 µm, the detection of nanoplastics remains a major challenge. The NanoPlasticsDetect project aims to break new ground in the quantitative detection of nanoplastics by exploiting time-resolved ultraviolet (UV) autofluorescence. Plastics emit intrinsic autofluorescence when illuminated in the UV, providing superior sensitivity to current Raman and infrared spectroscopies. The central objective is to improve detection sensitivity thanks to this autofluorescence property, targeting particles as small as 30 nm in diameter. A further original feature is the ability to differentiate between types of plastic by exploiting their autofluorescence lifetime. Developing this approach requires the development of suitable characterization methods, as well as a deeper understanding of the UV photophysics of nanoplastics. The NanoPlasticsDetect project aims to fill this gap by exploiting joint developments in spectroscopy, nanophotonics and the synthesis of calibrated plastic nanoparticles. The project builds on the partners' recent progress and preliminary results, with strong complementarity between the teams. This novel UV approach promises enhanced sensitivity, the ability to detect nanoscale particles, and a direct, label-free application ideal for in situ scenarios. The NanoPlasticsDetect project will open up new perspectives for the detection of nanoplastics, helping to better understand and quantify this invisible pollution.