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- W2324341444 abstract "Here we study the stability and rupture of molecular junctions under high voltage bias at the single molecule/single bond level using the scanning tunneling microscope-based break-junction technique. We synthesize carbon-, silicon-, and germanium-based molecular wires terminated by aurophilic linker groups and study how the molecular backbone and linker group affect the probability of voltage-induced junction rupture. First, we find that junctions formed with covalent S–Au bonds are robust under high voltage and their rupture does not demonstrate bias dependence within our bias range. In contrast, junctions formed through donor–acceptor bonds rupture more frequently, and their rupture probability demonstrates a strong bias dependence. Moreover, we find that the junction rupture probability increases significantly above ∼1 V in junctions formed from methylthiol-terminated disilanes and digermanes, indicating a voltage-induced rupture of individual Si–Si and Ge–Ge bonds. Finally, we compare the rupture probabilities of the thiol-terminated silane derivatives containing Si–Si, Si–C, and Si–O bonds and find that Si–C backbones have higher probabilities of sustaining the highest voltage. These results establish a new method for studying electric field breakdown phenomena at the single molecule level." @default.
- W2324341444 created "2016-06-24" @default.
- W2324341444 creator A5007637381 @default.
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- W2324341444 date "2015-02-24" @default.
- W2324341444 modified "2023-10-09" @default.
- W2324341444 title "Electric Field Breakdown in Single Molecule Junctions" @default.
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- W2324341444 doi "https://doi.org/10.1021/ja512523r" @default.
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