Effect of H2S Plasma Treatment on the Surface Modification of a Polyethylene Terephthalate Surface

Abstract

H2S plasma created by an electrode-less radio-frequency discharge was used to modify the surface properties of the polymer polyethylene terephthalate. X-ray photoelectron spectroscopy, secondary ion mass spectrometry and atomic force microscopy were used to determine the evolution of the surface functionalities and morphology. A very thin film of chemically bonded sulfur formed on the surface within the first 10 s of treatment, whereas treatment for more than 20 s caused deposition of higher quantities of unbonded sulfur. The sulfur concentration reached a maximum of between 40 and 80 s of plasma treatment; at longer treatment times, the unbonded sulfur vanished, indicating instability of the deposited sulfur layer. Large differences in the surface morphology were observed.

Colorimetric Detection of Perfluorinated Compounds by All-Polymer Photonic Transducers

“…Such treatment results in improved adhesion properties. 22−24 To develop a routine for HY activation, we tested plasmas with different O 2 /N 2 ratios. 19 The surface activation was assessed by water contact angle measurements for over 24 h after the plasma treatment.…”

Sulfur promotes hydrogen evolution on molybdenum carbide catalysts

“…In contrast, for higher sulfur loadings (Z11 wt%) the excess sulfur started to bind with carbon, forming C-S bonds as shown in both C 1s (C-S peak, 1s 285.67 eV) and S 2p spectra (S-C double peaks, 2p 3/2 162.23 and 2p 1/2 163.53 eV. 33,34 ); in the presence of excessive sulfur, S starts to be used to form MoS 2 resulting in a Mo 2 C/MoS 2 composite when the limit of sulfur replacement of carbon site is reached. For S (11), the formation of MoS 2 is assigned to a typical S 2p spectrum of MoS 2 (Fig.…”

Growth of Multiorientated Polycrystalline MoS2 Using Plasma-Enhanced Chemical Vapor Deposition for Efficient Hydrogen Evolution Reactions

“…This position corresponded to the substrate position. With the introduction of H 2 S = 60 sccm ( Figure 1 e), some of the excited emission lines were suppressed owing to the emergence of other active species, such as S 2 molecules, H 2 molecules, atomic H (H α ), and atomic S (S I 923.46 nm line), caused by the electron impact dissociation of molecular gases [ 27 ]. These active molecular species and atomic H and S significantly affected the microstructure of the film [ 26 ].…”