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Oxygen-Silver Junction Formation for Single Molecule Conductance

대한화학회지 2015년 59권 1호 p.18 ~ 21
 ( Jo Han-Yeol ) - Hankuk University of Foreign Studies Department of Physics

 ( Yoo Pil-Sun ) - Hankuk University of Foreign Studies Department of Physics
 ( Kim Tae-Kyeong ) - Hankuk University of Foreign Studies Department of Physics

Abstract


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.

키워드

STM break-junction; Single molecule electronics; Oxygen; Ag electrodes
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