@article{9d998675ab014405b2befaece02675c8,
title = "Unravelling 3D Dynamics and Hydrodynamics during Incorporation of Dielectric Particles to an Optical Trapping Site",
abstract = "Mapping of the spatial and temporal motion of particles inside an optical field is critical for understanding and further improvement of the 3D spatio-temporal control over their optical trapping dynamics. However, it is not trivial to capture the 3D motion, and most imaging systems only capture a 2D projection of the 3D motion, in which the information about the axial movement is not directly available. In this work, we resolve the 3D incorporation trajectories of 200 nm fluorescent polystyrene particles in an optical trapping site under different optical experimental conditions using a recently developed widefield multiplane microscope (imaging volume of 50 × 50 × 4 μm3). The particles are gathered at the focus following some preferential 3D channels that show a shallow cone distribution. We demonstrate that the radial and the axial flow speed components depend on the axial distance from the focus, which is directly related to the scattering/gradient optical forces. While particle velocities and trajectories are mainly determined by the trapping laser profile, they cannot be completely explained without considering collective effects resulting from hydrodynamic forces.",
keywords = "3D imaging, hydrodynamics, multiplane widefield microscopy, optical field, optical trapping, particle tracking",
author = "Boris Louis and Huang, {Chih Hao} and Rafael Camacho and Scheblykin, {Ivan G.} and Teruki Sugiyama and Tetsuhiro Kudo and Marc Melendez and Rafael Delgado-Buscalioni and Hiroshi Masuhara and Johan Hofkens and Roger Bresoli-Obach",
note = "Funding Information: This work was supported by the Flemish Government through long-term structural funding Methusalem (CASAS2, Meth/15/04), by the Research Foundation - Flanders (FWO, grant numbers G0A817N, W002221N, and 1529418N), by the KU Leuven (C14/16/053; C14/22/085), by the National Science and Technology Council [NSTC, former Ministry of Science and Technology (MOST)] of Taiwan (NSTC 111-2634-F-A49-007, NSTC 111-2113-M-A49-016-, 110-2929-I-009-508, 110-2113-M-A49-016-, and 108-2112-M-009-008-), and by a bilateral agreement between FWO and MOST (grant VS00721N). B.L. and R.B.-O acknowledge FWO for their personal grants (11B1119N, 12Z8120N, respectively). R.B.-O. also thanks the Agencia Estatal de Investigaci{\'o}n for a Ramon y Cajal contract (RYC2021-032773-I). T.K. thanks the JSPS KAKENHI (JP 21K14555). T.S. acknowledges KAKENHI Grant-in-Aid (No. JP22H05138) for Transformative Research Areas (A) “Revolution of Chiral Materials Science using Helical Light Fields” from the Japan Society for the Promotion of Science (JSPS) and JSPS KAKENHI (No. JP22K20512). I.G.S. thanks the Swedish Research Council (2016-4433). H.M and T.S. also acknowledge the Center for Emergent Functional Matter Science of National Yang Ming Chiao Tung University from The Featured Areas Research Center Program within the framework of the Higher Education SPROUT Project by the Ministry of Education (MOE) in Taiwan. This work is dedicated to the late Prof. Juan Jos{\'e} S{\'a}enz from the Donostia International Physics Center (DIPC, Donostia, Spain) for his enthusiastic support of international collaboration on COODY-Nano (COllective Optofluidic DYnamics of NPs) on which the present work is made possible. Publisher Copyright: {\textcopyright} 2023 American Chemical Society.",
year = "2023",
month = feb,
day = "28",
doi = "10.1021/acsnano.2c11753",
language = "English",
volume = "17",
pages = "3797--3808",
journal = "ACS Nano",
issn = "1936-0851",
publisher = "American Chemical Society",
number = "4",
}