TY - JOUR
T1 - Deconvolution of Tunneling Current in Large-Area Junctions Formed with Mixed Self-Assembled Monolayers
AU - Jin, Junji
AU - Kong, Gyu Don
AU - Yoon, Hyo Jae
N1 - Funding Information:
This research was supported by the NRF of Korea (NRF-2017M3A7B8064518). H.J.Y. also acknowledges the support from the Future Research Grant by Korea University.
PY - 2018/8/16
Y1 - 2018/8/16
N2 - Whereas single-component self-assembled monolayers (SAMs) have served widely as organic components in molecular and organic electronics, how the performance of the device is influenced by the heterogeneity of monolayers has been little understood. This paper describes charge transport by quantum tunneling across mixed SAMs of n-alkanethiolates of different lengths formed on ultraflat template-stripped gold substrate. Electrical characterization using liquid metal comprising eutectic gallium-indium alloy reveals that the surface topography of monolayer largely depends on the difference in length between the thiolates and is translated into distribution of tunneling current density. As the length difference is more significant, more phase segregation takes place, leading to an increase in the modality of Gaussian fitting curves. Consequently, statistical analysis permits access to deconvolution of tunneling currents, mirroring the phase-segregated surface. Our work provides an insight into the role of surface topography in the performance of molecular-scale electronic devices.
AB - Whereas single-component self-assembled monolayers (SAMs) have served widely as organic components in molecular and organic electronics, how the performance of the device is influenced by the heterogeneity of monolayers has been little understood. This paper describes charge transport by quantum tunneling across mixed SAMs of n-alkanethiolates of different lengths formed on ultraflat template-stripped gold substrate. Electrical characterization using liquid metal comprising eutectic gallium-indium alloy reveals that the surface topography of monolayer largely depends on the difference in length between the thiolates and is translated into distribution of tunneling current density. As the length difference is more significant, more phase segregation takes place, leading to an increase in the modality of Gaussian fitting curves. Consequently, statistical analysis permits access to deconvolution of tunneling currents, mirroring the phase-segregated surface. Our work provides an insight into the role of surface topography in the performance of molecular-scale electronic devices.
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U2 - 10.1021/acs.jpclett.8b01997
DO - 10.1021/acs.jpclett.8b01997
M3 - Article
C2 - 30063358
AN - SCOPUS:85051776959
SN - 1948-7185
VL - 9
SP - 4578
EP - 4583
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 16
ER -