Au nanolayers deposited on polyethyleneterephtalate and polytetrafluorethylene degraded by plasma discharge

作者：Svorcik V^*; Siegel J; Slepicka P; Kotal V; Svorcikova J; Spirkova M

来源：Surface and Interface Analysis, 2007, 39(1): 79-85.

DOI：10.1002/sia.2512

• polyethyleneterephtalate and polytetrafluorethylene
• plasma discharge
• chemical structure and surface morphology modification
• Au evaporation

Polyethyleneterephtalate (PET) and polytetrafluorethylene (PTFE) foils were modified by plasma discharge. The effect of plasma modification on polymer surface wettability and on properties of gold coatings were studied as a function of time from plasma exposure (aging time) and polymer substrate temperature. Thickness, sheet resistance, and surface topology of gold layers were studied. Aging of the plasma-exposed samples is accompanied by increase in contact angle, which is explained by rearrangement of the polymer segments in the polymer surface monolayer, and a decrease in the concentration of polar groups. The aging also leads to a decline in surface roughness R-a measured by atomic force microscopy (AFM). Under deposition conditions, comparable thicknesses of deposited Au layers were prepared on pristine PET and plasma-treated PET and PTFE samples. The thinnest Au layers were evaporated onto pristine PTFE. The sheet resistance decreases with increasing thickness of Au layer. Plasma treatment leads to an increase of PTFE surface roughness, which becomes even more pronounced after Au deposition. A higher roughness shows that the PET samples are deposited with the Au layer at temperatures above the glassy transition temperature T-g.

• 出版日期2007-1