Yu, Eui-Sang Lee, Sang-Hun Lee, Geon Park, Q-Han Chung, Aram J. Seo, Minah Ryu, Yong-Sang 2024-01-19T14:32:41Z 2024-01-19T14:32:41Z 2021-09-05 2021-06 2198-3844 https://pubs.kist.re.kr/handle/201004/116931 Probing the kinetic evolution of nanoparticle (NP) growth in liquids is essential for understanding complex nano-phases and their corresponding functions. Terahertz (THz) sensing, an emerging technology for next-generation laser photonics, has been developed with unique photonic features, including label-free, non-destructive, and molecular-specific spectral characteristics. Recently, metasurface-based sensing platforms have helped trace biomolecules by overcoming low THz absorption cross-sectional limits. However, the direct probing of THz signals in aqueous environments remains difficult. Here, the authors report that vertically aligned nanogap-hybridized metasurfaces can efficiently trap traveling NPs in the sensing region, thus enabling us to monitor the real-time kinetic evolution of NP assemblies in liquids. The THz photonics approach, together with an electric tweezing technique via spatially matching optical hotspots to particle trapping sites with a nanoscale spatial resolution, is highly promising for underwater THz analysis, forging a route toward unraveling the physicochemical events of nature within an ultra-broadband wavelength regime. English WILEY Nanoscale Terahertz Monitoring on Multiphase Dynamic Assembly of Nanoparticles under Aqueous Environment Article 10.1002/advs.202004826 1 ADVANCED SCIENCE, v.8, no.11 ADVANCED SCIENCE 8 11 scie scopus 000631730100001 2-s2.0-85102917818 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article nanoparticles nanophotonics and plasmonics nanoscale electrical tweezers optical biosensors terahertz optics