Preparation of polytetrafluoroethylene by pulsed electron ablation: Deposition and wettability aspects

Henda, Redhouane; Wilson, Graeme N.; Gray-Munro, J.E.; Alshekhli, Omar; McDonald, Andrew M.

doi:10.1016/j.tsf.2011.09.035

Cited by 20 publications

(17 citation statements)

References 22 publications

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“…The crystallite size decreases with increasing Sr doping. The decreasing of the crystallite size may be due to the slowing of the crystal growth process [19]. Thus, doping of LaFeO 3 by Sr possibly affects the crystall growth rate, resulting in decreasing the mean grain size in these films.…”

Section: Resultsmentioning

confidence: 99%

Perovskite La1-xSrxFeO3 Thin Films Deposited by Laser Ablation Process

Cyza

Cieniek

Kopia

2016

Archives of Metallurgy and Materials

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The aim of the research was to investigate the influence of strontium on the structure of thin films La1-xSrxFeO 3 (x = 0; 0,1; 0,2). The LaFeO 3 and Sr-doped LaFeO3 films were produced by pulsed laser deposition (PLD) on Si (100) substrate using the Nd-YAG (λ = 266 nm) laser. SEM, AFM and XRD methods were used to characterize the structure and morphology of the thin films. X-Ray Diffraction analysis showed only the LaFeO 3 phase in the undoped thin film and the La0.9Sr0.1O 3 and La0.8Sr0.2O 3 phases in thin films doped by Sr. The mean crystallite size, calculated by Williamson-Hall method, was smaller (of the order of 18 nm) in films doped by Sr. SEM analysis showed small droplets in thin films doped by Sr. Highly developed surface layer was observed using the AFM microscope for thin films doped by Sr.Keywords: Perovskite LaFeO 3 , thin films, gas sensors, PLD on the surface structure of thin films by modification of process parameters. it were found optimal conditions for the deposition of nanocrystalline thin films of LaCoO 3 doped by Sr using laser ablation method. The study of the influence of Sr doping on the structure of LaFeO 3 thin films deposited by PLD is presented in this paper. Experimental Preparation of targetsThe undoped LaFeO 3 targets were purchased from the Kurt J. Lesker Company. The powders of La1-xSrxO 3 (x = 0.1, 0.2) were prepared by mechanical alloying method. The powders La1-xSrxO 3 multiphase La 2 O 3 , La(OH) 3 , La1-xSrxFeO 3 (x = 0, 0.1, 0.2) were milled in ball mill during t = 2, 4, 6, 10 hours using ZrO 2 balls. The powders were dried at temperature 973 K during 4 hours. Then, the targets were prepared by compacting the powders of La1-xSrxFeO 3 under a pressure of p = 10 9 Pa during 5 min then the pellets were sintered at T = 1623°K during 10 h. Deposition of thin filmsThe La1-x SrxCoO 3 (x = 0, 0.1, 0.2) thin films were deposited on (100) oriented Si substrate using a laser ablation system equipped with the Nd-YAG (266 nm) laser and the chamber

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Section: Resultsmentioning

confidence: 99%

Perovskite La1-xSrxFeO3 Thin Films Deposited by Laser Ablation Process

Cyza

Cieniek

Kopia

2016

Archives of Metallurgy and Materials

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“…PED technology belongs to the family of the channel spark discharges, a type of hollow cathode glow discharge in which a target material is ablated by the local heating induced by an accelerated electron beam [8,9]. At the very beginning, this technique was mainly employed for the deposition of both inorganic, i.e., superconductive MBa 2 Cu 3 O 7−x [10], and organic, i.e., polytetrafluoroethylene (PTFE) [11], thin films.…”

Section: Introductionmentioning

confidence: 99%

The Pulsed Electron Deposition Technique for Biomedical Applications: A Review

et al. 2019

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The "pulsed electron deposition" (PED) technique, in which a solid target material is ablated by a fast, high-energy electron beam, was initially developed two decades ago for the deposition of thin films of metal oxides for photovoltaics, spintronics, memories, and superconductivity, and dielectric polymer layers. Recently, PED has been proposed for use in the biomedical field for the fabrication of hard and soft coatings. The first biomedical application was the deposition of low wear zirconium oxide coatings on the bearing components in total joint replacement. Since then, several works have reported the manufacturing and characterization of coatings of hydroxyapatite, calcium phosphate substituted (CaP), biogenic CaP, bioglass, and antibacterial coatings on both hard (metallic or ceramic) and soft (plastic or elastomeric) substrates. Due to the growing interest in PED, the current maturity of the technology and the low cost compared to other commonly used physical vapor deposition techniques, the purpose of this work was to review the principles of operation, the main applications, and the future perspectives of PED technology in medicine.

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“…The thickness of the deposited films can be easily controlled, as it depends on the number of pulses. Finally, the chemical structure and properties of the target material are well preserved in the deposited coatings …”

Section: Introductionmentioning

confidence: 99%

“…Finally, the chemical structure and properties of the target material are well preserved in the deposited coatings. [9][10][11] However, the ablation of composite materials is a particularly challenging aspect of physical methods, due to different physical interactions of each composite component with the energetic beam. These differences can be used, for example, for the pulsed laser deposition of poorly absorbing polymers, by taking advantage of carbon particles as laser radiation absorbers.…”

mentioning

confidence: 99%

Poly(propylene)/carbon composite thin films obtained by pulsed electron‐beam deposition

Jędrzejewski

Piwowarczyk

Jędrzejewska

et al. 2018

Plasma Processes & Polymers

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For the first time pulsed electron beam deposition (PED) was used to deposit thin films composed of polymer‐carbon composite material. The targets were polypropylene‐carbon (PP/C) composites, with different carbon fillers: carbon black, nanotubes, or graphene. It was confirmed that coatings with composite structure were obtained – the PED method enables complex structures, including nanotubes, to be ablated whole from the target, transported toward substrate, and incorporated into the polymer matrix. These breakthrough results can contribute significantly to improved understanding of the mechanism of electron beam ablation of polymer and composite materials, and open up new possibilities for the deposition of complex composite thin films for use in, for example, advanced sensor applications.

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Preparation of polytetrafluoroethylene by pulsed electron ablation: Deposition and wettability aspects

Cited by 20 publications

References 22 publications

Perovskite La1-xSrxFeO3 Thin Films Deposited by Laser Ablation Process

Perovskite La1-xSrxFeO3 Thin Films Deposited by Laser Ablation Process

The Pulsed Electron Deposition Technique for Biomedical Applications: A Review

Poly(propylene)/carbon composite thin films obtained by pulsed electron‐beam deposition

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