A comparative study of electron transport in benzene molecule covalently bonded to gold and silicon electrodes for pioneering the electron transport properties of silicon quantum dot-molecule hybrid polymers

Choi, Jin-Kyu; Pham, Hien Thu; Jeong, Hyun‐Dam

doi:10.1016/j.cap.2015.03.021

Cited by 2 publications

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References 61 publications

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“…4g ), where the rising point is different for the two states, as shown in the logarithmic plot in the inset. On the basis of the results of the theoretical analysis of the junction with semiconductor electrodes, in which the existence of a band gap affects the conductance characteristics differently from the cases of metal electrodes 32 33 , the difference in the rising point of the I–V curve is considered to reflect the difference in the position of lowest unoccupied molecular orbital (LUMO)/highest occupied molecular orbital energy level 29 34 and the dominant current is caused by the LUMO level in the case of the DEB molecule 27 . The observed phenomena are consistent with the results of analysis.…”

Section: Resultsmentioning

confidence: 99%

Mechanically activated switching of Si-based single-molecule junction as imaged with three-dimensional dynamic probe

et al. 2015

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Understanding and extracting the full functions of single-molecule characteristics are key factors in the development of future device technologies, as well as in basic research on molecular electronics. Here we report a new methodology for realizing a three-dimensional (3D) dynamic probe of single-molecule conductance, which enables the elaborate 3D analysis of the conformational effect on molecular electronics, by the formation of a Si/single molecule/Si structure using scanning tunnelling microscopy (STM). The formation of robust covalent bonds between a molecule and Si electrodes, together with STM-related techniques, enables the stable and repeated control of the conformational modulation of the molecule. By 3D imaging of the conformational effect on a 1,4-diethynylbenzene molecule, a binary change in conductance with hysteresis is observed for the first time, which is considered to originate from a mechanically activated conformational change.

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