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

被引：155

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：

瑞士国家科学基金会; 匈牙利科学研究基金会;

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

页码：699 / 713

页数：15

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