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Plasma‐Modified PTFE for Biological Applications: Correlation between Protein‐Resistant Properties and Surface Characteristics
Author(s) -
Vandencasteele Nicolas,
Nisol Bernard,
Viville Pascal,
Lazzaroni Roberto,
Castner David G.,
Reniers François
Publication year - 2008
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200700143
Subject(s) - adsorption , plasma , materials science , surface roughness , analytical chemistry (journal) , etching (microfabrication) , plasma etching , surface finish , polytetrafluoroethylene , oxygen , chemistry , chemical engineering , chromatography , layer (electronics) , composite material , organic chemistry , physics , quantum mechanics , engineering
PTFE samples were treated by low‐pressure O 2 RF plasmas. The adsorption of BSA was used as a probe for the protein‐resistant properties. Exposure of PTFE to an O 2 plasma leads to an increase in chamber pressure. OES reveals the presence of CO, CO 2 and F in the gas phase, indicating a strong etching of the PTFE surface by the plasma. Furthermore, the high‐resolution C1s spectra show CF 3 , CF and CCF components. WCA as high as 160° were observed, indicating a super‐hydrophobic behavior. AFM images of surfaces treated at high plasma power showed an increase in roughness. Lower amounts of BSA adsorption were detected on high power, O 2 plasma‐modified PTFE samples compared to low power, oxygen plasma‐modified ones.