Electrical resistance variation of carbon-nanotube networks due to surface modification of glass substrate

✍ Scribed by Jang, Eui Yun ;Seo, Dong Kyun ;Jung, Seoho ;Kim, Taewoo ;Kang, Tae June ;Kim, Yong Hyup

• Book ID: 105365576
• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 952 KB
• Volume: 207
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200925442

✦ Synopsis

Abstract

This study presents the effect of the wettability between a glass substrate and carbon‐nanotube (CNT) colloidal solution on the density of CNT networks in a dip‐coating process. The surface roughness and the density of functional groups of the glass substrate were modified by using an oxygen‐plasma treatment, and then we observed the density of CNT networks with respect to different surface conditions due to the surface modification. It is confirmed that the surface chemical property and the surface morphology of the glass substrate determines the density of CNT networks formed by the dip‐coating method. The change of surface free energy induced by hydroxylation and hydration enhances the wettability between a glass substrate and CNT colloidal solution. Moreover, the effective area on which silanol groups can be formed is dependent on the roughness of the surface of the substrate. Eventually, the change of the surface free energy due to the hydroxylation, hydration, and surface roughness effect on the density of the coated CNTs, which determines the sheet resistance of CNT networks.