Rf magnetron sputtering of polytetrafluoroethylene under various conditions

Biederman, Hynek; Zeuner, Michael; Zalman, Jan; Bílková, P.; Slavı́nská, D.; Stelmasuk, V; Boldyreva, Alexandra

doi:10.1016/s0040-6090(01)01029-x

Cited by 70 publications

(66 citation statements)

References 15 publications

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“…It was found that the average contact angle of Pt nanorods was about 52 o indicating a hydrophilic surface. Similarly, for the normal angle deposited flat Teflon thin film, the average contact angle was about 108 o which indicates a hydrophobic surface, and it is in close agreement with the previously reported values of the contact angle of Teflon films [5]. As can be seen in Table 1, higher contact angle values of composite (Pt/Teflon) have been measured indicating a significant increase in the hydrophobicity of originally hydrophilic Pt nanostructures.…”

Section: Resultssupporting

confidence: 90%

“…It was found that as the surface roughness increases, the contact angle of the metallic nanorods decreases and therefore these nanostructures resulted in hydrophilic surfaces. On the other hand, many studies have focused on utilizing Radio Frequency (RF) sputtering technique to deposit Polytetrafluoroethylene (PTFE), commonly known as Teflon, on rough surfaces to get superhydrophobic surfaces [2][3][4][5][6][7][8]. It has been documented that an increase in PTFE film surface roughness increases the contact angle of water and therefore hydrophobicity without altering the surface chemistry [2,3].…”

Section: Introductionmentioning

confidence: 99%

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Hydrophobic Metallic Nanorods coated with Teflon Nanopatches by Glancing Angle Deposition

2009

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Introducing a hydrophobic property to vertically aligned hydrophilic metallic nanorods was investigated experimentally and theoretically. First, platinum nanorod arrays were deposited on flat silicon substrates using a sputter Glancing Angle Deposition Technique (GLAD). Then a thin layer of Teflon (nanopatches) was partially deposited on the tips of platinum nanorod at a glancing angle of θ = 85 o as well as at normal incidence (θ = 0 o ) for different deposition times. We show that GLAD technique is capable of depositing ultrathin isolated Teflon nanopatches on selective regions of nanorod arrays due to the shadowing effect during GLAD. Contact angle measurements on Pt/Teflon nano-composite have shown contact angle values as high as 138 o , indicating a significant increase in the hydrophobicity of originally hydrophilic Pt nanostructures. Finally, a 2D simplified wetting model utilizing Cassie and Baxter theory of heterogeneous surfaces has been developed to explain the wetting behavior of Pt/Teflon nanocomposite.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Hydrophobic Metallic Nanorods coated with Teflon Nanopatches by Glancing Angle Deposition

2009

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“…There are a lot of reports on the PTFE thin films prepared by PVD methods, such as vacuum evaporation and r.f. sputtering [3][4][5][6][7][8][9][10][11][12][13][14]. Many researchers had reported on properties of the fluorocarbon polymer thin films prepared by r.f.…”

Section: Introductionmentioning

confidence: 99%

Fluorocarbon polymer thin films prepared by three different types of r.f. magnetron sputtering systems

Iwamori

Hasegawa

Uemura

2008

Surface and Coatings Technology

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“…Recently, a variety of techniques are available to fabricate polymer coatings like electrochemical synthesis, [6] self-assembly, [7] sol-gel, [8] plasma polymerization, [9] pulsed laser ablation, [10] ion beam, [11] vacuum evaporation (thermal, electron beam) [1,12] , and sputtering technique. [13,14] Although many of the polymer coatings can be fabricated from solution methods, these films suffer easily from the contamination of residual solvent or impurities present in the solution. Meanwhile, the solution methods are not suitable for fabricating uniform nano-scaled coatings and multilayer structure systems because the solvent damages the underlying layer.…”

Section: Introductionmentioning

confidence: 99%

Growth feature of PTFE coatings on rubber substrate by low-energy electron beam dispersion

Liu

Zhou

Рогачев

et al. 2015

Polym. Adv. Technol.

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Polytetrafluoroethylene (PTFE) coatings were prepared on Si and acrylonitrile-butadiene rubber substrates by lowenergy electron beam dispersion. The effects of substrate nature, distance of target to substrate (d ts ) and coatings thickness on the surface morphology, structure, and tribological properties of the coatings were investigated. The results showed that substrate nature affects the shape and size distribution of surface conglomerations of PTFE coatings due to the interaction process of active dispersion particles with underlying polymer layer. Surface energy of PTFE coatings decreases first with the coatings thickness increases to 1.25 μm and then slowly increases with the thickness. Structure defects (pore, interstice, and so on) in the coatings increase with the thickness increases but reduce significantly with the d ts increases. PTFE coating prepared at the d ts of 20 cm had a higher intensity of the amorphous absorption bands. Friction experiment indicated that the destroyed area of the coatings in the friction region decreases with increases the coatings thickness but increases with the d ts . The rubber modified by PTFE coatings with spherical structure possesses a higher stability in the friction process and a lower coefficient of friction.

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Rf magnetron sputtering of polytetrafluoroethylene under various conditions

Cited by 70 publications

References 15 publications

Hydrophobic Metallic Nanorods coated with Teflon Nanopatches by Glancing Angle Deposition

Hydrophobic Metallic Nanorods coated with Teflon Nanopatches by Glancing Angle Deposition

Fluorocarbon polymer thin films prepared by three different types of r.f. magnetron sputtering systems

Growth feature of PTFE coatings on rubber substrate by low-energy electron beam dispersion

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