Deposition of Yarrowia lipolytica on plasma prepared teflonlike thin films

Abstract

The adhesion of Yarrowia lipolytica to teflonlike thin films deposited by plasma on polycarbonate substrates was investigated through a series of tests in order to develop a substrate for strong and selective adhesion of Yarrowia lipolytica cells. Teflonlike thin films were prepared using atmospheric pressure surface barrier discharge with mixtures of octafluorocyclobutane (C 4 F 8 ) and nitrogen as plasma gas. A variety of plasma gas feedrates and different deposition times were studied. The films were characterised by Fourier transform infrared and contact angle measurements using the sessile drop technique. Total surface energy and its components were calculated using the acid base theory. Attachment of the yeast cells was assessed by optical and scanning electron microscopy. The optimal deposition conditions for cell adhesion were determined using standard adhesion tests.

Biocidal action of ozone-treated polystyrene surfaces on vegetative and sporulated bacteria

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Superhydrophobicity of cotton fabrics treated with silica nanoparticles and water-repellent agent

“…These hierarchical double structures are achieved by the two physical characteristics: surface roughness due to the micro-or nano-structures and hydrophobicity because of waxy materials on top of the rough structures. Thus, to attain superhydrophobic surfaces, modification of surface chemistry is always needed [8,9] in conjunction with the surface roughness.…”

Plasma induced patterning of polydimethylsiloxane surfaces

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