title: Landing Dynamics of Swimming Bacteria on a Polymeric Surface: Effect of Surface Properties.
abstract: Landing of bacteria for adhesion on a surface is a common phenomenon in our life. However, how surface properties are involved in this process remains largely unclear. Using digital holographic microscopy, we investigated the three-dimensional motions of flagellate Escherichia coli swimming near polymeric surfaces with different properties in aqueous solution before adhesion. We monitored the bacteria landing dynamics, which shows that the density distribution, the probability, and the orientation for collisions of the bacteria are determined by their motility but are slightly affected by the surface properties. However, surface hydrophobicity reduces the near-wall velocity of the bacteria through collisions and slightly increases the collision duration. This promotes the landing and adhesion of bacteria. By contrast, most bacteria collide with the surface using their flagella, which resist adhesion.
authors.affiliation: Faculty of Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Meng
authors.initials: M
authors.lastname: Qi
authors.affiliation: Faculty of Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Xiangjun
authors.identifier: 0000-0001-7049-944X
authors.initials: X
authors.lastname: Gong
authors.affiliation: Faculty of Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Bo
authors.initials: B
authors.lastname: Wu
authors.affiliation: Faculty of Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Guangzhao
authors.initials: G
authors.lastname: Zhang
mesh_terms: D001422:Bacterial Adhesion; D004926:Escherichia coli / Q000502:physiology*; D057927:Hydrophobic and Hydrophilic Interactions; D009038:Motion; D011108:Polymers / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D011108:Polymers