Characterization of the layer growth of plasma-polymerized HMDSO coatings on polycarbonate

Michaeli, Walter; Fonteiner, Ingrid; Goebel, Sebastian

doi:10.1002/1439-2054(20001201)284:1<30::aid-mame30>3.3.co;2-x

Cited by 10 publications

(2 citation statements)

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“…The HMDSO plasma‐polymerized surface showed a cauliflower‐like structure with agglomerations and no cracks. This property was also observed in an AFM study,9 as well as on flat substrates 10. The increase in the oxygen content leads to a more glass‐like structure and a smoother surface.…”

Section: Resultssupporting

confidence: 64%

Continuous Coating of Synthetic Fibers Using Hexamethyldisiloxane

Keller

Fortunato

Körner

et al. 2007

Plasma Process. Polym.

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The aim of this work was to optimize hexamethyldisiloxane (HMDSO) discharges for a continuous deposition on polyester (PET) multifilament fibers (PET 167f136) and to characterize the as‐deposited coatings. Therefore, PET fibers/yarns were cleaned in a one‐step plasma process prior to the coating to ensure a clean and a well‐defined substrate material. XPS was used to investigate the silicon and carbon content. High levels of SiO4 bonds led to a hard and brittle, glass‐like coating. The coating thickness was around 100 nm. Tensile strength tests showed that increasing the heat treatment yielded a decrease in the initial tensile load of the fiber. To correlate the carbon content and wettability, contact angle measurements were performed; scanning electron microscope (SEM) showed a cauliflower‐like structure of the coatings.

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Section: Resultssupporting

confidence: 64%

Continuous Coating of Synthetic Fibers Using Hexamethyldisiloxane

Keller

Fortunato

Körner

et al. 2007

Plasma Process. Polym.

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“…The plasma-derived silica film, however, is expected to be random, patchy and less tightly packed. Actually, the 'cauliflower morphology' reported in earlier papers [41] is applicable in this case, as seen from the patchy background of figure 6(b). Therefore, creation of a diffusion barrier is not expected.…”

Section: Surface Chemistrymentioning

confidence: 65%

Hierarchical nanostructures by nanotube grafting on porous cellular surfaces

Mukhopadhyay¹,

Karumuri

Barney

2009

J. Phys. D: Appl. Phys.

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Natural biological systems make use of capillary-type hierarchical structures in order to enhance surface functionality within limited size. This paper discusses fabrication of similar synthetic structures by grafting carbon nanotubes (CNTs) on microcellular substrates such as graphitic foam. A major hurdle so far had been deposition of dense CNT layers inside uneven pores. This has been overcome in this study by pre-coating the porous surface with plasma-derived silica molecules. It is seen that the pre-coating not only increases the density of nanocatalyst attachment on the surface but also makes each nanocatalyst more effective in nucleation and growth of nanotubes. The CNT layers formed are strongly attached to the substrate, which makes them particularly suitable for use in robust hierarchical devices in the future.

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