| 1 | Controllable optofluidic assembly of biological cells using an all-dielectric one-dimensional photonic crystal显示文摘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. | FENGYA LU LEI GONG YAN KUAI XI TANG YIFENG XIANG PEI WANG DOUGUO ZHANG | 2022 | Photonics Research2022，10，1： | 0 |
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