Nano-FTIR and chemical force analysis of electrografted aryldiazonium salts on ODT-microcontact printed Au-surfaces

被引：3
作者：
Su, Jiangling [1 ]
Orive, Alejandro Gonzalez [2 ]
Grundmeier, Guido [1 ]
机构：
[1] Paderborn Univ, Tech & Macromol Chem, Dept Chem, Warburger Str 100, D-33098 Paderborn, Germany
[2] Univ Laguna, Mat & Nanotechnol Inst, Dept Chem, Avda Astrofisico Francisco Sanchez S-N, San Cristobal De La Lagun 38206, Spain
来源：
APPLIED SURFACE SCIENCE | 2023年 / 609卷
关键词：
Microcontact printing; Electrografting; Aryldiazonium salts; Nano-FTIR spectroscopy; Adhesion; Chemical force microscopy; SELF-ASSEMBLED MONOLAYERS; ELECTROCHEMICAL REDUCTION; DIAZONIUM SALTS; FUNCTIONAL-GROUPS; CARBON; MICROSCOPY; ADHESION; GOLD; TITRATIONS; RESOLUTION;
D O I：
10.1016/j.apsusc.2022.155355
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The aim of this work is the analysis of pH-dependent adhesion on micropatterned electrografted aryldiazonium salts on gold substrates. A PDMS stamp inked with 1-octadecanethiol (ODT) solution was used for microcontact printing. Electrografting of nitrophenyl (C6H5-NO2) occurred in the ODT-free regions. An additional electro-chemical reduction step led to aminophenyl (C6H5-NH2) covered surfaces. The corresponding surface chemical states of the pattern were investigated by means of PM-IRRAS and XPS. The local surface structure was microscopically analyzed by means of FE-SEM and AFM as well as nano-FTIR spectroscopy. The ODT covered areas of the patterned substrates allowed for clear distinction between the pH-dependent forces of the nitro-phenyl (C6H5-NO2)-and aminophenyl (C6H5-NH2)-terminated layers as measured by chemical force microscopy. COOH-functionalized AFM tips in aqueous electrolytes ranging from pH 5-10 were employed. It could be shown that the aminophenyl (C6H5-NH2) terminated surface led to higher adhesion forces in comparison to the nitrophenyl (C6H5-NO2) group.
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页数：10
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