Effects of dodecylamine and dodecanethiol on the conductive properties of nano-Ag films

被引：69

作者：

Mo, Lixin ^{[1
]}

Liu, Dongzhi ^{[1
]}

Li, Wei ^{[1
]}

Li, Luhai ^{[2
]}

Wang, Lichang ^{[3
]}

Zhou, Xueqin ^{[1
]}

机构：

[1] Tianjin Univ, Sch Chem Engn, Tianjin 300072, Peoples R China

[2] Beijing Inst Graph Commun, Beijing Area Key Lab Printing & Packaging Mat & T, Beijing 102600, Peoples R China

[3] So Illinois Univ, Dept Chem & Biochem, Carbondale, IL 62901 USA

来源：

APPLIED SURFACE SCIENCE | 2011年 / 257卷 / 13期

关键词：

Silver nanoparticles; Conductive ink; Protective agents; Heat-treatment; SELF-ASSEMBLED MONOLAYERS; SILVER NANOPARTICLES; THERMAL-BEHAVIOR; TEMPERATURE; NANOCRYSTALS; FABRICATION; PARTICLES;

D O I：

10.1016/j.apsusc.2011.01.090

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：

Nano-Ag particles, with dodecylamine (DDA) and dodecanethiol (DDT) as the protective agent, were prepared and studied in order to investigate the effect of protective agent in the post heat-treatment of nano-Ag films. Results of electrical resistivity, micro-structural evolution and thermal analysis showed that the Ag-DDA films require a lower treatment temperature to convert into conductive materials compared to that of the Ag-DDT films. And the Ag-DDA films also have lower final electrical resistivity as well as more uniform and dense microstructure in comparison with the Ag-DDT films. Further study indicated that Ag-DDA films are thermodynamically unstable and the sinter of Ag-DDA particles could occur spontaneously even at room temperature. FT-IR, H-1 NMR and X-ray diffraction determinations revealed that both DDA and DDT molecules coordinate to the surface of nano-Ag particles through their head-groups. The bonding energy of Ag-S is higher than that of Ag-N and the alkyl chains ordering of chemisorbed DDT is also higher than that of chemisorbed DDA. It is implied that the post heat-treatment temperature and final resistivity of nano-Ag films are associated with the bonding energy and configuration of different capping molecules. Finally the conductive ink was prepared with well dispersed Ag-DDA nanoparticles and the ink-jet printed patterns on PI films show a sheet resistance of 166m Omega/square after heat-treating at 140 degrees C for 60 min. (C) 2011 Elsevier B. V. All rights reserved.

引用

页码：5746 / 5753

页数：8

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