Preparation of a superhydrophobic rough surface

Protein adsorption and cellular behavior depend strongly on the wettability of substrates. Such studies are scarce for surfaces exhibiting extreme values of contact angles. Fibronectin (FN) adsorption and adhesion of MC3T3-E1 cells were investigated on superhydrophobic polystyrene (SH-PS) surfaces and compared with the corresponding smooth polystyrene (PS) substrate and the control glass. The FN surface density was lower on the SH-PS than on PS, and the adsorbed protein showed altered conformation of cell adhesion domains, as obtained by ELISA with monoclonal antibodies. Cell adhesion occurred on the SH-PS without the formation of mature focal adhesions, as assessed by immunofluorescence for vinculin, talin and paxillin. Correspondingly, the development of the actin cytoskeleton was delayed and without the presence of defined F-actin fibers. FAK phosphorylation was reduced on SH-PS, as compared with PS and the control glass. Also, cell contractility was diminished on the SH-PS as revealed by phosphorylation of myosin light chain (pMLC). Likewise, FN reorganization and secretion were impaired on the superhydrophobic surfaces. Cell proliferation was significantly lower in SH-PS as compared with PS up to 21 days of culture.

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“…7,38 That FN adsorption occurs indeed on the SH-PS was confirmed by measuring WCA after FN adsorption (Fig. 2B).…”

Section: à2mentioning

confidence: 83%

“…Superhydrophobic surfaces have generated an increasing interest in the past few years owing to their industrial and scientific applications. [7][8][9][10][11] Nevertheless, the use of this kind of materials for biomedical applications has been poorly studied.…”

Section: Introductionmentioning

confidence: 99%

Role of superhydrophobicity in the biological activity of fibronectin at the cell–material interface

et al. 2011

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“…52 The fibers align hydrodynamically in flight so that they are mostly perpendicular to the surface and are trapped when the polymer hardens. The density of the fibers can be altered and relatively large surface areas can be treated.…”

Section: Other Fiber Surfacesmentioning

confidence: 99%

The superhydrophobicity of polymer surfaces: Recent developments

Shirtcliffe

McHale

Newton

2011

J Polym Sci B Polym Phys

168

108

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Superhydrophobicity is the extreme water repellence of highly textured surfaces. The field of superhydrophobicity research has reached a stage where huge numbers of candidate treatments have been proposed and jumps have been made in theoretically describing them. There now seems to be a move to more practical concerns and to considering the demands of individual applications instead of more general cases. With these developments, polymeric surfaces with their huge variety of properties have come to the fore and are fast becoming the material of choice for designing, developing, and producing superhydrophobic surfaces.

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“…Anodic aluminum oxide has been proposed as a suitable industrial process for use in the burgeoning field of nanotechnology [21] for developing nano-pore structure films with advantage of improvement of corrosion and wear resistance [22][23][24]. Low surface energy coatings can be produced by deposition of low surfaceenergy materials such as fluorocarbons and silicones precursors [8,10,25].…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic and icephobic surfaces prepared by RF-sputtered polytetrafluoroethylene coatings

Jafari

Menini

Farzaneh

2010

Applied Surface Science

196

102

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A superhydrophobic and icephobic surface were investigated on aluminum alloy substrate.Anodizing was used first to create a micro-nano structured aluminum oxide underlayer on the alloy substrate. In a second step, the rough surface was coated with RF-sputtered polytetrafluoroethylene (PTFE or Teflon®). Scanning electron microscopy images showed a "bird's nest"-like structure on the anodized surface. The RF-sputtered PTFE coating exhibited a high static contact angle of ~ 165º with a very low contact angle hysteresis of ~ 3º. X-ray photoelectron spectroscopy (XPS) results showed high quantities of CF 3 and CF 2 groups, which are responsible for the hydrophobic behavior of the coatings. The performance of this superhydrophobic film was studied under atmospheric icing conditions. These results showed that on superhydrophobic surfaces ice adhesion strength was 3.5 times lower than on the polished aluminum substrate.

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Preparation of a superhydrophobic rough surface

Cited by 73 publications

References 32 publications

Role of superhydrophobicity in the biological activity of fibronectin at the cell–material interface

Role of superhydrophobicity in the biological activity of fibronectin at the cell–material interface

The superhydrophobicity of polymer surfaces: Recent developments

Superhydrophobic and icephobic surfaces prepared by RF-sputtered polytetrafluoroethylene coatings

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