e-Journal of Surface Science and Nanotechnology
Online ISSN : 1348-0391
Conference -ACSIN-12&ICSPM21-
Sequential Phase Transition during Fabricating β-Ag2S Film on Ag Electrode by Wet Chemical Process
Hirofumi TanakaTomoki AkaiDaisuke TanakaTakuji Ogawa
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2014 Volume 12 Pages 185-188


A wet chemical process was used for low-cost fabrication of Ag2S flat thin films on the Ag electrodes utilized for an atomic switch. By precisely controlling the dipping condition, a flat thin film of β-Ag2S (cubic) was successfully fabricated. When a Ag thin film was dipped into a 0.01%-Na2S aqueous solution, α-Ag2S (monoclinic) was first precipitated, and then β-Ag2S, a Ag(I) ion conductor, was precipitated on the surface after dipping for 12 h. Because the ion-conduction in β-Ag2S is much larger than that in α-Ag2S with negligibly small, the results are important information for utilization of Ag2S for electric devices such as atomic switch. By combining the fabricated β-Ag2S electrodes with an organic field effect transistor structure, a Ag wire was grown on the surface of the β-Ag2S electrode only when the FET was in the “on” state. [DOI: 10.1380/ejssnt.2014.185]

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