Influence of Atmosphere on Photo-Assisted Atomic Switch Operations


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We conducted light irradiation experiments in air to clarify influence of atmosphere on the operation of a photo-assisted atomic switch. In air, Pt-Ag2S/Ag nanogap electrodes with a PTCDI thin layer in their nanogaps showed current fluctuations with an applied bias of from 1.5 V to 6 V regardless of the bias polarity and with or without light irradiation. This is in contrast to the fact that only two things cause an increase in current that result in the formation of a silver bridge and switching behavior under vacuum, namely, light irradiation and the application of positive bias to the Ag2S/Ag electrode [. In addition, photocurrent caused by irradiating a PTCDI thin layer was found to be sensitive to air and to N2. These results indicate that moisture or other gas molecules in air and in N2 have an influence on the photo-assisted atomic switching behavior.



Edited by:

Sumio Hosaka




T. Hino et al., "Influence of Atmosphere on Photo-Assisted Atomic Switch Operations", Key Engineering Materials, Vol. 596, pp. 116-120, 2014

Online since:

December 2013




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[8] The measurements shown in Fig. 4 and 5 are from Pt-Ag2S/Ag gap electrodes with a gap size of approximately 400 nm. No current fluctuations were observed in the measurements in air or in N2.