Molecular electronics hold promise for next generation ultra-low power, nano-scale integrated electronics. The main challenge in molecular electronics is to make a reliable interface between molecules and metal electrodes. Interfacing metals and molecules detrimentally affects the characteristics of nano-scale molecular electronic devices. It is therefore essential to investigate alternative arrangements such as contact-less tunneling gaps wherever such configurations are feasible. We conduct ab initio density functional theory and non-equilibrium Green's functions calculations to investigate the transport properties of a biocompatible glycine molecular junction. By analyzing the localized molecular orbital energy distributions and transmission probabilities in the transport-gap, we find a glycine molecule confined between two gold electrodes, without making a contact, is energetically stable and possesses high tunneling current resembling an excellent ohmic-like interface.
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28 July 2014
Research Article|
July 29 2014
Contactless electronic transport in a bio-molecular junction
Faruque M. Hossain;
Faruque M. Hossain
a)
1Department of Electrical and Electronic Engineering,
The University of Melbourne
, Parkville 3010, Australia
2Center for Neural Engineering (CfNE),
The University of Melbourne
, Parkville 3010, Australia
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Feras Al-Dirini;
Feras Al-Dirini
1Department of Electrical and Electronic Engineering,
The University of Melbourne
, Parkville 3010, Australia
2Center for Neural Engineering (CfNE),
The University of Melbourne
, Parkville 3010, Australia
Search for other works by this author on:
Efstratios Skafidas
Efstratios Skafidas
1Department of Electrical and Electronic Engineering,
The University of Melbourne
, Parkville 3010, Australia
2Center for Neural Engineering (CfNE),
The University of Melbourne
, Parkville 3010, Australia
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a)
Author to whom correspondence should be addressed. Electronic mail: fhossain@unimelb.edu.au
Appl. Phys. Lett. 105, 043102 (2014)
Article history
Received:
February 19 2014
Accepted:
July 20 2014
Citation
Faruque M. Hossain, Feras Al-Dirini, Efstratios Skafidas; Contactless electronic transport in a bio-molecular junction. Appl. Phys. Lett. 28 July 2014; 105 (4): 043102. https://doi.org/10.1063/1.4891857
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