Frequency dependent multiphase flows on centrifugal microfluidics

Pishbin, Esmail; Kazemzadeh, Amin; Chimerad, Mohammadreza; Asiaei, Sasan; Navidbakhsh, Mahdi; Russom, Aman

doi:10.1039/c9lc00924h

Cited by 14 publications

(2 citation statements)

References 41 publications

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“…The formation of biofilms on the surface of medical devices and implants is a major cause of nosocomial or healthcare-associated infections. − The spreading and adhesion of bacteria are often more severe in the presence of liquid, for example, in the forms of slug flow and intermittent droplets. − It is therefore necessary to design surfaces that are not only liquid repellent but also resistant to biological contamination in order to prevent initial bacterial attachment. In recent years, there has been a lot of research toward the use of superhydrophobic surfaces to reduce bacterial adhesion and, thus, biofilm formation. − Superhydrophobic surfaces often rely on low-surface-energy coatings on nanostructures with a particular roughness.…”

Section: Introductionmentioning

confidence: 99%

“… 1 − 5 The spreading and adhesion of bacteria are often more severe in the presence of liquid, for example, in the forms of slug flow and intermittent droplets. 6 − 9 It is therefore necessary to design surfaces that are not only liquid repellent but also resistant to biological contamination in order to prevent initial bacterial attachment. In recent years, there has been a lot of research toward the use of superhydrophobic surfaces to reduce bacterial adhesion and, thus, biofilm formation.…”

Section: Introductionmentioning

confidence: 99%

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Wettability and Bactericidal Properties of Bioinspired ZnO Nanopillar Surfaces

Zhang,

Williams,

Jitniyom

et al. 2024

Langmuir

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Nanomaterials of zinc oxide (ZnO) exhibit antibacterial activities under ambient illumination that result in cell membrane permeability and disorganization, representing an important opportunity for health-related applications. However, the development of antibiofouling surfaces incorporating ZnO nanomaterials has remained limited. In this work, we fabricate superhydrophobic surfaces based on ZnO nanopillars. Water droplets on these superhydrophobic surfaces exhibit small contact angle hysteresis (within 2–3°) and a minimal tilting angle of 1°. Further, falling droplets bounce off when impacting the superhydrophobic ZnO surfaces with a range of Weber numbers (8–46), demonstrating that the surface facilitates a robust Cassie–Baxter wetting state. In addition, the antibiofouling efficacy of the surfaces has been established against model pathogenic Gram-positive bacteria Staphylococcus aureus (S. aureus) and Gram-negative bacteria Escherichia coli (E. coli). No viable colonies of E. coli were recoverable on the superhydrophobic surfaces of ZnO nanopillars incubated with cultured bacterial solutions for 18 h. Further, our tests demonstrate a substantial reduction in the quantity of S. aureus that attached to the superhydrophobic ZnO nanopillars. Thus, the superhydrophobic ZnO surfaces offer a viable design of antibiofouling materials that do not require additional UV illumination or antimicrobial agents.

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