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Electronic transport through ruthenium-based redox-active molecules in metal-molecule-metal nanogap junctions

Mahapatro, Ajit K. and Ying, Jiewen and Ren, Tong and Janes, David B. (2008) Electronic transport through ruthenium-based redox-active molecules in metal-molecule-metal nanogap junctions. NANO LETTERS, 8 (8). pp. 2131-2136.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl072982c

Abstract

Electronic transport through ruthenium-based redox-active organometallic molecules is measured by self-assembling diruthenium(III) tetra(2-anilinopyridinate)-di(4-thiolphenylethynyl) (trans-Ru2(ap)4(C′CC6H4S−)2 (A) and trans- Ru2(ap)4((C′CC6H4)2S−)2 (B) molecules in nanogap molecular junctions. Voltage sweeps at a high scan rate show low bias current peaks (at ±0.35 ± 0.05 V for A and ±0.27 ± 0.05 V for B), which change to plateaus in slow bias scans and a second conductance peak at approximatley ±1.05 ± 0.15 V. The peaks/plateaus are not observed in the return bias sweeps, possibly due to charge storage in the molecules. The energy states for the molecular orbitals of these molecules as estimated from the conductance peaks are in close agreement with the respective energy values from voltammetric measurements in solution.

Item Type:Article
Subjects:Physical Science > Nanoelectronics
Material Science > Nanochemistry
ID Code:6306
Deposited By:IoN
Deposited On:07 Aug 2009 10:45
Last Modified:07 Aug 2009 10:45

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