Long-Range Electron Transport of Ruthenium-Centered Multilayer Films via a Stepping-Stone Mechanism
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- 作者：Kei-ichi Terada ; Hisao Nakamura ; Katsuhiko Kanaizuka ; Masa-aki Haga ; Yoshihiro Asai ; Takao Ishida
- 刊名：ACS Nano
- 出版年：2012
- 出版时间：March 27, 2012
- 年：2012
- 卷：6
- 期：3
- 页码：1988-1999
- 全文大小：651K
- 年卷期：v.6,no.3(March 27, 2012)
- ISSN：1936-086X
文摘
We studied electron transport of Ru complex multilayer films, whose structure resembles redox-active complex films known in the literature to have long-range electron transport abilities. Hydrogen bond formation in terms of pH control was used to induce spontaneous growth of a Ru complex multilayer. We made a cross-check between electrochemical measurements and I鈥揤 measurements using PEDOT:PSS to eliminate the risk of pinhole contributions to the mechanism and have found small 尾 values of 0.012鈥?.021 脜鈥?. Our Ru complex layers exhibit long-range electron transport but with low conductance. On the basis of the results of our theoretical鈥揺xperimental collaboration, we propose a modified tunneling mechanism named the 鈥渟tepping-stone mechanism鈥? where the alignment of site potentials forms a narrow band around EF, making resonant tunneling possible. Our observations may support Tuccito et al.鈥檚 proposed mechanism.