Copper Nanoparticle/Multiwalled Carbon Nanotube Composite Films with High Electrical Conductivity and Fatigue Resistance Fabricated via Flash Light Sintering

Hyun-Jun Hwang; Sung-Jun Joo; Hak-Sung Kim

doi:10.1021/acsami.5b08112

Copper Nanoparticle/Multiwalled Carbon Nanotube Composite Films with High Electrical Conductivity and Fatigue Resistance Fabricated via Flash Light Sintering

ACS Appl Mater Interfaces. 2015 Nov 18;7(45):25413-23. doi: 10.1021/acsami.5b08112. Epub 2015 Nov 5.

Authors

Hyun-Jun Hwang¹, Sung-Jun Joo¹, Hak-Sung Kim^{1

2}

Affiliations

¹ Department of Mechanical Engineering, Hanyang University , Haengdang-dong, Seongdong-gu, Seoul 133-791, South Korea.
² Institute of Nano Science and Technology, Hanyang University , Seoul, 133-791, Korea.

PMID: 26505908
DOI: 10.1021/acsami.5b08112

Abstract

In this work, multiwalled carbon nanotubes (MWNTs) were employed to improve the conductivity and fatigue resistance of flash light sintered copper nanoparticle (NP) ink films. The effect of CNT weight fraction on the flash light sintering and the fatigue characteristics of Cu NP/CNT composite films were investigated. The effect of carbon nanotube length was also studied with regard to enhancing the conductivity and fatigue resistance of flash light sintered Cu NP/CNT composite films. The flash light irradiation energy was optimized to obtain high conductivity Cu NP/CNT composite films. Cu NP/CNT composite films fabricated via optimized flash light irradiation had the lowest resistivity (7.86 μΩ·cm), which was only 4.6 times higher than that of bulk Cu films (1.68 μΩ·cm). It was also demonstrated that Cu NP/CNT composite films had better durability and environmental stability than those of Cu NPs only.

Keywords: Cu nanoparticle; flash light; multiwalled carbon nanotube; printed electronics; sintering.

Publication types

Research Support, Non-U.S. Gov't