Investigation of electron-induced cross-linking of self-assembled monolayers by scanning tunneling microscopy

被引：4

作者：

Stohmann, Patrick ^{[1
]}

Koch, Sascha ^{[1
]}

Yang, Yang ^{[1
,2
]}

Kaiser, Christopher David ^{[1
]}

Ehrens, Julian ^{[3
]}

Schnack, Juergen ^{[3
]}

Biere, Niklas ^{[4
]}

Anselmetti, Dario ^{[4
]}

Goelzhaeuser, Armin ^{[1
]}

Zhang, Xianghui ^{[1
]}

机构：

[1] Univ Bielefeld, Phys Supramol Syst & Surfaces, Fac Phys, D-33615 Bielefeld, Germany

[2] Imperial Coll London, Dept Chem Engn, London SW7 2AZ, England

[3] Univ Bielefeld, Condensed Matter Theory Grp, Fac Phys, D-33615 Bielefeld, Germany

[4] Univ Bielefeld, Expt Biophys & Appl Nanosci, Fac Phys, D-33615 Bielefeld, Germany

来源：

BEILSTEIN JOURNAL OF NANOTECHNOLOGY | 2022年 / 13卷

基金：

欧盟地平线“2020”;

关键词：

carbon nanomembranes; electron-induced cross-linking; scanning tunneling microscopy; self-assembled monolayers; subnanometerpores; CARBON NANOMEMBRANES; TERPHENYLTHIOL; IRRADIATION; POLYMORPHISM; MOLECULES; MECHANISM; SURFACES; AU(111); METALS;

D O I：

10.3762/bjnano.13.39

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ultrathin membranes with subnanometer pores enabling molecular size-selective separation were generated on surfaces via electron-induced cross-linking of self-assembled monolayers (SAMs). The evolution of p-terphenylthiol (TPT) SAMs on Au(111) surfaces into cross-linked monolayers was observed with a scanning tunneling microscope. As the irradiation dose was increased, the cross- linked regions continued to grow and a large number of subnanometer voids appeared. Their equivalent diameter is 0.5 +/- 0.2 nm and the areal density is approximate to 1.7 x 10(17) m(-2). Supported by classical molecular dynamics simulations, we propose that these voids may correspond to free volumes inside a cross-linked monolayer.

引用

页码：462 / 471

页数：10

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