| Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2016) | |
| Thin Films | Wednesday Sessions |
| Session TF-WeP |
| Session: | Thin Films Posters Session II |
| Presenter: | Yasuhisa Tsukahara, Kyoto Institute of Technology, Japan |
| Authors: | T. Ikeda, Kyoto Institute of Technology, Japan H.T. Nguyen, Kyoto Institute of Technology, Japan J. Takagi, Kyoto Institute of Technology, Japan K. Yamakawa, Kyoto Institute of Technology, Japan K. Adachi, Kyoto Institute of Technology, Japan Y. Tsukahara, Kyoto Institute of Technology, Japan |
| Correspondent: | Click to Email |
Metals like copper are easily oxidized in air to form metal oxides on the surface. This is often problematic for their applications because of reduction of the electrical conductivity. We studied influence of molecular coating of organic thiol compounds on copper plates and fine particles on their oxidation resistance and electrical conductivity.
Copper and nickel surfaces were coated with thiol terminated polystyrenes (PSt-SH)s and alkanethiols by dipping copper into solutions of the thiol compounds. XPS measurements revealed that the molecular thin layer of PSt-SH lead to a resistance against oxidation. Coating with alkanethiols like 1-dodecanethiol (Dod-SH) was also effective. However, only the PSt-SH layer kept the oxidation resistance against heating at high temperature, which was also confirmed by the color change of the metal surface by heating.
We also used cyclic voltammetry (CV) to evaluate the oxidation resistance. The oxidation resistance was determined from the integral value at the anode and cathode regions in the oxidation-reduction curve. We found that the oxidation resistance of copper covered with PSt- SH was excellent at high temperatures under atmosphere and was not decreased even by heating up to 150°C.
The temperature dependences of the contact electrical resistance measured by the four-point method indicated that the electrical conductivity was not reduced for the metal surface coated with PSt-SH even at high temperatures which is consistent with the results of XPS and CV measurements.
[1] Takuya IKEDA, Kaoru ADACHI and Yasuhisa TSUKAHARA, Journal of MMIJ, Vol.132, No.2, pp.39 - 46 (2016).
[2] Takuya IKEDA, Tomoki TAKATA, Juri TAKAGI, Kaoru ADACHI, and Yasuhisa TSUKAHARA, Kobunshi Ronbunshu, Vol.73, No.2, pp.198 - 206 (2016).
[3] Juri TAKAGI, Takuya IKEDA, Kaoru ADACHI, and Yasuhisa TSUKAHARA, Kobunshi Ronbunshu, Vol.73, No.3, pp.294 - 301 (2016).