Measurement of thermopower and current-voltage characteristics of molecular junctions to identify orbital alignment

2010 ◽  
Vol 96 (1) ◽  
pp. 013110 ◽  
Author(s):  
Aaron Tan ◽  
Seid Sadat ◽  
Pramod Reddy
Keyword(s):  
Molecular Junctions ◽  
Current Voltage ◽  
Current Voltage Characteristics

scholarly journals High electronic couplings of single mesitylene molecular junctions

2015 ◽  
Vol 6 ◽  
pp. 2431-2437 ◽  
Author(s):  
Yuki Komoto ◽  
Shintaro Fujii ◽  
Tomoaki Nishino ◽  
Manabu Kiguchi
Keyword(s):  
Charge Transport ◽  
Channel Model ◽  
Single Channel ◽  
Molecular Junctions ◽  
Liquid Environment ◽  
Resonant Tunnelling ◽  
Current Voltage ◽  
Electronic Conductance ◽  
Current Voltage Characteristics ◽  
High Conductance

We report on an experimental analysis of the charge transport properties of single mesitylene (1,3,5-trimethylbenzene) molecular junctions. The electronic conductance and the current–voltage characteristics of mesitylene molecules wired into Au electrodes were measured by a scanning tunnelling microscopy-based break-junction method at room temperature in a liquid environment. We found the molecular junctions exhibited two distinct conductance states with high conductance values of ca. 10−1 G 0 and of more than 10−3 G 0 (G 0 = 2e 2/h) in the electronic conductance measurements. We further performed a statistical analysis of the current–voltage characteristics of the molecular junctions in the two states. Within a single channel resonant tunnelling model, we obtained electronic couplings in the molecular junctions by fitting the current–voltage characteristics to the single channel model. The origin of the high conductance was attributed to experimentally obtained large electronic couplings of the direct π-bonded molecular junctions (ca. 0.15 eV). Based on analysis of the stretch length of the molecular junctions and the large electronic couplings obtained from the I–V analysis, we proposed two structural models, in which (i) mesitylene binds to the Au electrode perpendicular to the charge transport direction and (ii) mesitylene has tilted from the perpendicular orientation.

scholarly journals Inelastic Current-Voltage Characteristics of Atomic and Molecular Junctions

Nano Letters ◽  
2005 ◽  
Vol 5 (4) ◽  
pp. 813-813
Author(s):  
Yu-Chang Chen ◽  
Michael Zwolak ◽  
Massimiliano Di Ventra
Keyword(s):  
Molecular Junctions ◽  
Current Voltage ◽  
Current Voltage Characteristics

scholarly journals Inelastic Current−Voltage Characteristics of Atomic and Molecular Junctions

Nano Letters ◽  
2004 ◽  
Vol 4 (9) ◽  
pp. 1709-1712 ◽  
Author(s):  
Yu-Chang Chen ◽  
Michael Zwolak ◽  
Massimiliano Di Ventra
Keyword(s):  
Molecular Junctions ◽  
Current Voltage ◽  
Current Voltage Characteristics

scholarly journals Quantitative Current–Voltage Characteristics in Molecular Junctions from First Principles

Nano Letters ◽  
2012 ◽  
Vol 12 (12) ◽  
pp. 6250-6254 ◽  
Author(s):  
Pierre Darancet ◽  
Jonathan R. Widawsky ◽  
Hyoung Joon Choi ◽  
Latha Venkataraman ◽  
Jeffrey B. Neaton
Keyword(s):  
First Principles ◽  
Molecular Junctions ◽  
Current Voltage ◽  
Current Voltage Characteristics

Asymmetric current–voltage characteristics of molecular junctions containing bipolar molecules

2006 ◽  
Vol 417 (4-6) ◽  
pp. 401-405 ◽  
Author(s):  
Zbigniew L. Gasyna ◽  
Gustavo M. Morales ◽  
Arturo Sanchez ◽  
Luping Yu
Keyword(s):  
Molecular Junctions ◽  
Current Voltage ◽  
Current Voltage Characteristics
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