Assembly of aligned semiconducting carbon nanotubes in organic solvents via introducing inter-tube electrostatic repulsion. (May 2019)

• Record Type: Journal Article
• Authors: Gao, Bing; Zhang, Xiaopin; Qiu, Song; Jin, Hehua; Song, Qijun; Li, Qingwen
• Is Part Of: Carbon. Volume 146(2019)
• Page Start: 172
• Page End: 180
• Publication Date: 2019-05
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2019.01.095
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: The main challenge for application of solution-derived carbon nanotube (CNT) in high performance field-effect transistor is how to obtain the aligned film with full surface coverage and uniform inter-tube pitch. Herein, a wafer-scale aligned array of s-SWCNTs can be assembled using the combination of the introduced inter-tube electrostatic repulsion and an improved "bi-phasic" dip-coating method. By using a conjugated molecule with positive charge to modify the charge on the surface of s-SWCNTs dispersed in organic solvents, the inter-tube electrostatic repulsion was correspondingly introduced. The inter-tube electrostatic repulsion can significantly inhibit the agglomeration of s-SWCNTs in the formation process of the aligned SWCNT films. Significantly, the aligned SWCNT thin film exhibits excellent surface coverage and anisotropy over the 3 inch aligned area. Graphical abstract: Image 1