Eui-Sang Yu Jeong, Eui Tae Seungha Lee Kim, In Soo Chung, Seok Han, Seungyeon Choi, Inhee Ryu, Yong-Sang 2024-01-19T10:04:42Z 2024-01-19T10:04:42Z 2023-01-19 2023-02 1936-0851 https://pubs.kist.re.kr/handle/201004/114059 Emerging as substantial concerns in the ecosystem, submicron plastics have attracted much attention for their considerable hazards. However, their effect and even amount in the environment remain unclear. Establishing a substantive analytic platform is essential to expand the understanding of nanoplastics. However, the issues of diffusion and detection limit that arise from ultradiluted concentration and extremely small scales of nanoplastics leave significant technical hurdles to analyze the nanoplastic pollutants. In this study, we obtain effective Raman signals in real time from underwater nanoplastics with ultralow concentrations via AC electro-osmotic flows and dielectrophoretic tweezing. This enables the field-induced active collection of nanoplastics toward the optical sensing area from remote areas in a rapid manner, integrating conventional technical skills of preconcentration, separation, and identification in a single process. A step further, synergetic combination with plasmonic nanorods, accomplishes the highest on-site detection performance so far. English American Chemical Society Real-Time Underwater Nanoplastic Detection beyond the Diffusion Limit and Low Raman Scattering Cross-Section via Electro-Photonic Tweezers Article 10.1021/acsnano.2c07933 1 ACS Nano, v.17, no.3, pp.2114 - 2123 ACS Nano 17 3 2114 2123 N scie scopus 000906457900001 2-s2.0-85145287643 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article MICROPLASTICS IDENTIFICATION SPECTROSCOPY ENVIRONMENT FLOW microplastic nanoplastic Raman spectroscopy surface-enhanced Raman scattering dielectrophoresis