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Optorheological Characteristics of Photosynthetic Bacterium Suspension
Langmuir ( IF 3.7 ) Pub Date : 2021-09-07 , DOI: 10.1021/acs.langmuir.1c01527 Min Jung Kim 1 , Zheng Min Huang 2 , Yun Ki Kim 3 , Jyongsik Jang 3 , Jae Ryoun Youn 1 , Young Seok Song 2
Langmuir ( IF 3.7 ) Pub Date : 2021-09-07 , DOI: 10.1021/acs.langmuir.1c01527 Min Jung Kim 1 , Zheng Min Huang 2 , Yun Ki Kim 3 , Jyongsik Jang 3 , Jae Ryoun Youn 1 , Young Seok Song 2
Affiliation
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Understanding the rheological behavior of materials is of great importance in science. Here, we report a microscopic foundation for optorheology by manipulating the rheological feature through light. A new phenomenon is observed in the photosynthetic bacterial suspension, that the fluid viscosity changes by light-induced electrons. Type IV pili of photosynthetic bacteria is found, and it allows the electron to transport through the exterior of cells and changes the surface potential of cells, which causes an adjustment in the spatial arrangement of cells in the suspension. When an external electric field is applied, the electric dipole of the cells is induced and their dispersion is changed. The rheological properties are measured to evaluate the internal structure of the suspension depending on the light. The photoelectrons enhance the dispersion of the photosynthetic bacteria in the solution, thus leading to a significant increment in the viscosity. We envision that this discovery will provide new applications to the interface of optics, bioengineering, and rheology.
中文翻译：
光合细菌悬浮液的光变特性
了解材料的流变行为在科学中具有重要意义。在这里，我们通过光操纵流变学特征报告了光流变学的微观基础。在光合细菌悬浮液中观察到一个新现象，即流体粘度通过光诱导电子发生变化。发现光合细菌IV型菌毛，它允许电子通过细胞外部传输并改变细胞的表面电位，从而引起悬浮液中细胞空间排列的调整。当施加外部电场时，细胞的电偶极子被诱导并改变它们的分散。测量流变特性以评估取决于光的悬浮液的内部结构。光电子增强了光合细菌在溶液中的分散，从而导致粘度显着增加。我们设想这一发现将为光学、生物工程和流变学的界面提供新的应用。
更新日期：2021-09-21
中文翻译：
光合细菌悬浮液的光变特性
了解材料的流变行为在科学中具有重要意义。在这里，我们通过光操纵流变学特征报告了光流变学的微观基础。在光合细菌悬浮液中观察到一个新现象，即流体粘度通过光诱导电子发生变化。发现光合细菌IV型菌毛，它允许电子通过细胞外部传输并改变细胞的表面电位，从而引起悬浮液中细胞空间排列的调整。当施加外部电场时，细胞的电偶极子被诱导并改变它们的分散。测量流变特性以评估取决于光的悬浮液的内部结构。光电子增强了光合细菌在溶液中的分散，从而导致粘度显着增加。我们设想这一发现将为光学、生物工程和流变学的界面提供新的应用。
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