Local infrared spectral measurement system for the inspection of independent nano-plastic particles in water-based solutions†

Abstract

This study proposes a new method of bubble accumulation that enables the capture of individual nanoparticles diluted in water-based solvent and the evaluation of the shape and local infrared spectra of each independent nanoparticle. We have demonstrated this system using nanoparticles of defined size generated by nano-second laser ablation. Following a process of concentration of microbubbles, we have been able to analyze the material properties of individual nanoparticles by AFM-IR. The AFM images and IR spectra results indicate the presence of independent nanoparticles, and the IR spectra showed that the particle size is considered to decrease as the oxidation reaction progresses. This system approach for the concentration and analysis of nanoparticles can particularly contribute to bio adaptation research, since the identification of the physical properties of nanoparticles can provide a better understanding of the environmental/biological effects and relationships, the mechanism of nanoparticle aggregation and the interatomic forces between particles.