Single-Molecule Break Junctions Based on a Perylene-Diimide Cyano-Functionalized (PDI8-CN2) Derivative

被引：11
作者：
Frisenda, Riccardo [1 ]
Parlato, Loredana [2 ,3 ]
Barra, Mario [2 ,3 ]
van der Zant, Herre S. J. [1 ]
Cassinese, Antonio [2 ,3 ]
机构：
[1] Delft Univ Technol, Kavli Inst Nanonsci, NL-2628 CJ Delft, Netherlands
[2] Univ Naples Federico II, CNR SPIN, I-80125 Naples, Italy
[3] Univ Naples Federico II, Dept Phys, I-80125 Naples, Italy
来源：
NANOSCALE RESEARCH LETTERS | 2015年 / 10卷
关键词：
Perylene-diimide molecules; Single molecule; Break junctions; Conductance; Density functional theory; CHARGE-TRANSPORT; MOBILITY; AMBIENT;
D O I：
10.1186/s11671-015-1011-3
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this letter, we report the single-molecule conductance properties of a cyano-functionalized perylene-diimide derivative (PDI8-CN2) investigated with gold nano-electrodes. This molecule is of large interest for the fabrication of high-performance and air-stable n-type organic field-effect transistors. Low-bias experiments performed on mechanically controllable break junctions reveal the presence of two different values of the single-molecule conductance, which differ by about two orders of magnitudes. Up to date, this feature was never observed for other perylene-diimide compounds having alternative chemical moieties attached to the basic aromatic core. Theoretical calculations suggest that the highest single-molecule conductance value here observed, comprised between 10(-2) and 10(-3) G(0), is related to a charge transport path directly linking the two cyano groups.
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页数：7
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