Chemical Treatment for Aluminum Alloys, Low Electrical Resistance Coating

The gas sensitivity properties of carbon nanotubes were investigated. The carbon nanotubes in this study were fabricated by hot filament chemical vapor deposition using Ni/Fe catalyst. The sensor samples were treated by chemical etching using H2SO4/HNO3. The experimental results have shown that the electrical resistance of carbon nanotubes was sensitively changed on exposure to gaseous ambient containing ethanol and water vapor. It was found that the gas sensitivity of carbon nanotubes was greatly enhanced after chemical treatment. It was also shown that the response time of nanotube sensor was faster than that of usual sensors.

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The anisotropic structure of electro conductive leather studied by Van der Pauw method

Textile & Leather Review ◽

10.31881/tlr.2019.16 ◽

2019 ◽

Vol 2 (3) ◽

pp. 136-144

Author(s):

Aulon Shabani ◽

Majlinda Hylli ◽

Ilda Kazani ◽

Pellumb Berberi ◽

Orion Zavalani ◽

...

Keyword(s):

Chemical Treatment ◽

Electrical Resistance ◽

Surface Resistance ◽

Treatment Process ◽

Electrode Placement ◽

Conductive Materials ◽

Measuring Surface ◽

Van Der Pauw ◽

Placement Technique ◽

Van Der Pauw Method

Determining the surface resistance of electro conductive refined natural leather materials is in the focus of this paper. Natural leather samples are initially transformed to conductive by applying chemical treatment process known as polymerization. Due to the existence of various techniques for measuring electrical resistance of conductive materials, we are focused on measuring surface resistance by arranging four electrodes in the edges of square leather samples, also known as Van der Pauw method. Improving the results accuracy, we use a multi-variant electrode placement over the sample edges. The result is the average of all results gained for different placements. Moreover, we use this electrode placement technique to analyse the anisotropy of conductive samples. The results of this research provide important knowledge about leather chemical treatment and its electrical proprieties.

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