Argon etching effect

Pretreated (enzymatic and enzymatic-I-hydrogen peroxide) knitted wool fabrics were treated with argon and atmospheric air plasma to improve adsorption capacity (Demir et al., 2010). After plasma treatment, a chitosan solution was appUed for antimicrobial effect. The treated fabrics were evaluated in terms of washing stabiUty as well as antimicrobial activity. The surface morphology was characterized by SEM images and Fourier transform infrared (FilR) analysis. The results indicate that the atmospheric plasma treatment had an etching effect and increased the fiinctionahty of wool surface. Atmospheric plasma treatment also enhanced the adhesion of chitosan to the surface and improved the antimicrobial activity. 

Table 2.1 gives the hydrophUidty as a function of exposure duration, power and the type of plasma treatment. It can be seen that the argon plasma was more effective than the air plasma, which can be attributed to the significant etching effect of the former. As seen in Table 2.2, the argon plasma was more effective than the air plasma, consistent with the hydrophilicity... 

The morphology of the surface of the oxide solid mask undergoes modifications due to the physical effect of particles bombarding the surface. In the SEM microphotograph of cleavage, we observed the presence of hollow channels in the aluminum oxide mask and pits in silicon. From the data it follows that, at the chosen mode of etching of the structure, the accelerated neutral atoms of argon completely removed the barrier film layer of silicon oxide from the bottom part of the aluminum oxide bulk, and the surface layer of silicon substrate was etched. 

Aluminum oxide, as stabilizer, 296 Anderson model of superconductivity, 2 Anisotropic conduction, oxides, 40 Anisotropic GL theory, to ana superconductors. 19 Ann type, effect on cell parameters and magnetic properties, 142 Annealing parameters, films, 238,24(y Applications, BCS theory of superconductivity, 114 Argon laser-etched patterns, thin films, 257-25Atomic structure LajCuO, 27,2, 29 orthorhombic Y-Ba-Oi-0,27,2 ... 

Argon ion etching coupled with XPS analysis can give information on the composition of the exposed films to help examine the effects through the thickness of the sample. Note that for these heterogeneous systems calibration etch time to etch depth ratio is difficult, and thus changes in chemical composition are discussed relative to the surface (28). 

The etching study was conducted to complement ultrathin sectioning of high modulus oriented fibers [238]. Representative results of the plasma etching experiment are shown in the secondary electron images (SEI) (Fig. 4.19% Glass fibers and amorphous polyester film were used as controls. Oriented PET and aramid fibers were etched for 15 min in argon in order to evaluate the effect of the treatment on oriented crystaUine... 

Fig. 4.19 SEI images show the result of plasma etching with argon (A) a glass fiber surface shows no ordered details (B) amorphous PET film with particles but no order (C) an orient crystalline PET fiber surface with lateral striations, and (D) an aramid surface also with lateral striations. The effect of plasma etching with oxygen is shown for a glass fiber surface (E) which reveals no detail and (F) an aramid fiber which exWbits a lateral striated texture.

---