Opto-thermophoretic manipulation is emerging as an effective way for versatile trapping,guiding,and assembly of biological nanoparticles and cells.Here we report a new opto-thermophoretic tweezer based on an all-diele...Opto-thermophoretic manipulation is emerging as an effective way for versatile trapping,guiding,and assembly of biological nanoparticles and cells.Here we report a new opto-thermophoretic tweezer based on an all-dielectric one-dimensional photonic crystal(1 DPC)for reversible assembly of biological cells with a controllable center.To reveal its ability of long-range optofluidic manipulation,we demonstrate the reversible assembly of many yeast cells as well as E.coli cells that are dispersed in water solution.The 1 DPC-based tweezer can also exert short-range optical gradient forces associated with focused Bloch surface waves excited on the 1 DPC,which can optically trap single particles.By combining both the optical and thermophoretic manipulation,the optically trapped single polystyrene particle can work as a controllable origin of the reversible cellular assembly.Numerical simulations are performed to calculate the temperature distribution and convective flow velocity on the 1 DPC,which are consistent with the experimental observations and theoretically confirm the long-range manipulations on the alldielectric 1 DPC platform.The opto-thermophoretic tweezers based on all-dielectric 1 DPC endow the microma-nipulation toolbox for potential applications in biomedical sciences.展开更多
基金National Natural Science Foundation of China(12134013,11774330,U20A20216,31870759,11974333,61535011,62105066)Advanced Laser Technology Laboratory of Anhui Province(20192301)+3 种基金Key Research Development Program of Anhui Province(202104a05020010)Hefei Municipal Natural Science Foundation(2021007)The Anhui Initiative in Quantum Information Technologies(AHY090000)Natural Science Foundation of Fujian Province(2021J01163)。
文摘Opto-thermophoretic manipulation is emerging as an effective way for versatile trapping,guiding,and assembly of biological nanoparticles and cells.Here we report a new opto-thermophoretic tweezer based on an all-dielectric one-dimensional photonic crystal(1 DPC)for reversible assembly of biological cells with a controllable center.To reveal its ability of long-range optofluidic manipulation,we demonstrate the reversible assembly of many yeast cells as well as E.coli cells that are dispersed in water solution.The 1 DPC-based tweezer can also exert short-range optical gradient forces associated with focused Bloch surface waves excited on the 1 DPC,which can optically trap single particles.By combining both the optical and thermophoretic manipulation,the optically trapped single polystyrene particle can work as a controllable origin of the reversible cellular assembly.Numerical simulations are performed to calculate the temperature distribution and convective flow velocity on the 1 DPC,which are consistent with the experimental observations and theoretically confirm the long-range manipulations on the alldielectric 1 DPC platform.The opto-thermophoretic tweezers based on all-dielectric 1 DPC endow the microma-nipulation toolbox for potential applications in biomedical sciences.
