title: Patterned SLIPS for the Formation of Arrays of Biofilm Microclusters with Defined Geometries.
abstract: Biofilms represent an immense problem in medicine due to their strong drug-resistant properties and inherent stress-response activities. Due to the inhomogeneous and very complex architectures of large biofilm aggregates, biofilm studies often suffer from low reproducibility. In this study, an approach to form arrays of homogeneous biofilm microclusters with defined 2D geometries is presented. The method is based on the formation of water-infused hydrophilic porous polymer areas with precise geometries separated by "slippery" lubricant-infused porous surface (SLIPS). Due to the SLIPS' biofilm repellent properties, multiple identical 3D biofilm clusters are formed in the hydrophilic patches that can be used for biofilm screening. Formation of biofilm microcluster arrays of different bacterial strains of Pseudomonas aeruginosa on the SLIPS micropatterns is investigated. Critical parameters influencing minimal adhesive regions for biofilm attachment and minimal SLIPS dimensions to avoid biofilm adhesion are studied. The ability to produce arrays of biofilm microclusters with highly uniform, well-defined shapes opens an opportunity to study interactions of biofilms with various medically relevant factors with a better reproducibility and to investigate the complex biofilm architecture, heterogeneity, and interactions between biofilm subpopulations.
authors.affiliation: Institute of Functional Interfaces, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
authors.forename: Julia
authors.initials: J
authors.lastname: Bruchmann
authors.affiliation: Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
authors.forename: Ivana
authors.initials: I
authors.lastname: Pini
authors.affiliation: Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
authors.forename: Tejeshwar S
authors.initials: TS
authors.lastname: Gill
authors.affiliation: Institute of Functional Interfaces, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Schwartz
authors.affiliation: Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.|Institute of Organic Chemistry, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany.
authors.forename: Pavel A
authors.initials: PA
authors.lastname: Levkin
mesh_terms: D018441:Biofilms / Q000254:growth & development*; D046228:Microarray Analysis / Q000379:methods*; D011550:Pseudomonas aeruginosa / Q000502:physiology*
keywords: Pseudomonas aeruginosa; SLIPS; biofilms; patterning; porous polymer surface; superhydrophobicity