Presentation Information
[20p-A601-12]Collection and detection of gold nano particles using a self-propelled microrobot for Raman identification of nanoplastics in liquids
〇Hiromori Takahashi1, Keiko Esashika1, Kotarou Takano1, Toshiharu Saiki1 (1.Keio Univ.)
Keywords:
janus particle,liquid detection,nano plastics
In recent years, the potential toxicity of microplastics (MPs) and nanoplastics (NPs) has been widely pointed out and their effects on organisms and human health are a concern. For relatively large MPs, investigations of their distribution and migration pathways are underway, mainly in the marine environment, and experiments are underway to evaluate their toxicity and damage to organisms. The effects of MPs on organisms are mainly evaluated by laboratory exposure, and many physiological abnormalities due to accumulation in the body have been reported. On the other hand, the distribution of NPs and their effects on organisms and the human body are still unknown; since NPs themselves penetrate into tissues through cell membranes, their effects are considered to be more serious than those of MPs. NPs are generated when MPs are fragmented by ultraviolet light or physical forces, but due to their small size, it is not easy to confirm their existence prior to size measurement or substance identification. In this study, we propose and demonstrate a mechanism for simple and fast collection and identification of very small amounts of NPs by employing self-propelled robotic particles. Au nanoparticles are detected and adsorbed by Au-coated Janus particles to form hot spots for Raman identification of NPs during self-propelling in solution.