An MCBJ case study: The influence of π-conjugation on the single-molecule conductance at a solid/liquid interface

被引：153
作者：
Hong, Wenjing [1 ]
Valkenier, Hennie [2 ,3 ]
Meszaros, Gabor [1 ,4 ]
Manrique, David Zsolt [5 ]
Mishchenko, Artem [1 ]
Putz, Alexander [6 ,7 ]
Garcia, Pavel Moreno [1 ]
Lambert, Colin J. [5 ]
Hummelen, Jan C. [2 ,3 ]
Wandlowski, Thomas [1 ]
机构：
[1] Univ Bern, Dept Chem & Biochem, CH-3012 Bern, Switzerland
[2] Univ Groningen, Stratingh Inst Chem, NL-9747 AG Groningen, Netherlands
[3] Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands
[4] Hungarian Acad Sci, Chem Res Ctr, Inst Mat & Environm Chem, H-1025 Budapest, Hungary
[5] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England
[6] Res Ctr Juelich, Inst Bio & Nanosystems IBN 3, D-52425 Julich, Germany
[7] Res Ctr Juelich, Ctr Nanoelect Syst Informat Technol, D-52425 Julich, Germany
来源：
BEILSTEIN JOURNAL OF NANOTECHNOLOGY | 2011年 / 2卷
基金：
匈牙利科学研究基金会; 瑞士国家科学基金会;
关键词：
anthraquinone; pi-conjugation; mechanically controlled break junction; single-molecule conductance; SELF-ASSEMBLED MONOLAYERS; TUNNELING JUNCTIONS; ORGANIC-MOLECULES; CHARGE-TRANSPORT; ANCHORING GROUPS; ELECTRONICS; DEPENDENCE; RESISTANCE; METAL; CONDUCTIVITY;
D O I：
10.3762/bjnano.2.76
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
pi-Conjugation plays an important role in charge transport through single molecular junctions. We describe in this paper the construction of a mechanically controlled break-junction setup (MCBJ) equipped with a highly sensitive log I-V converter in order to measure ultralow conductances of molecular rods trapped between two gold leads. The current resolution of the setup reaches down to 10 fA. We report single-molecule conductance measurements of an anthracene-based linearly conjugated molecule (AC), of an anthraquinone-based cross-conjugated molecule (AQ), and of a dihydroanthracene-based molecule (AH) with a broken conjugation. The quantitative analysis of complementary current-distance and current-voltage measurements revealed details of the influence of p-conjugation on the single-molecule conductance.
引用
收藏
页码：699 / 713
页数：15
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