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KMID : 1059520150590010018
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Journal of the Korean Chemical Society
2015 Volume.59 No. 1 p.18 ~ p.21
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Oxygen-Silver Junction Formation for Single Molecule Conductance
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Jo Han-Yeol
Yoo Pil-Sun
Kim Tae-Kyeong
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Abstract
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We use a scanning tunneling microscope based break-junction technique to measure the conductance of a 4,4'- dimethoxybiphenyl molecular junction formed with Ag and Au electrodes. We observe the formation of a clear molecular junction with Ag electrodes that result from stable Ag-oxygen bonding structures. However we have no molecular bonding formation when using Au electrodes, resulting in a tunneling current between the top and bottom metal electrodes. We also see a clear peak in the conductance histogram of the Ag-oxygen molecular junctions, but no significant molecular features are seen with Au electrodes. Our work should open a new path to the conductance measurements of single-molecule junctions with oxygen linkers.
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KEYWORD
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STM break-junction, Single molecule electronics, Oxygen, Ag electrodes
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