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Researchers from Sharif University of Technology Discuss Findings in Vacuum Technology

February 25, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Investigators publish new report on Vacuum Technology. According to news reporting out of Tehran, Iran, by VerticalNews editors, research stated, "In this research, we have used glancing angle deposition (GLAD) RF sputtering technique with various angular speeds ranging from 5 to 30 RPM to fabricate polytetrafluoroethylene (PTFE, Teflon) coated Tungsten on glass substrate for producing hydrophobic surface. According to scanning electron microscopy (SEM) observations, Tungsten nanorods were formed on the substrate with average diameter and length of about similar to 50 nm and 300 nm, respectively."

Our news journalists obtained a quote from the research from the Sharif University of Technology, "Hydrophobic property of W/Glass and PTFE/W/Glass systems was investigated by water contact angle measurements and we have found that the contact angle varied with the substrate angular speed. Maximum contact angle of 121 degrees was measured for the PTFE/W/Glass system at optimum angular speed of 10 RPM. X-ray photoelectron spectroscopy (XPS) determined surface chemical composition and F/C ratio was obtained at 1.15."

According to the news editors, the research concluded: "Based on our data analysis, both of the investigated systems obey Cassie-Baxter model."

For more information on this research see: Correlation between surface roughness and hydrophobicity of GLAD RF sputtered PTFE/W/Glass nanorod thin films. Vacuum, 2014;101():279-282. Vacuum can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier -; Vacuum -

Our news journalists report that additional information may be obtained by contacting A. Bayat, Sharif Univ Technol, Inst Nanosci & Nanotechnol, Tehran, Iran. Additional authors for this research include M. Ebrahimi and A.Z. Moshfegh.

Keywords for this news article include: Iran, Asia, Tehran, Vacuum Technology

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Source: Journal of Technology

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