Selective removal of metallic single-walled carbon nanotubes in full length by organic film-assisted electrical breakdown

• DOI: 10.1039/c4nr01690d
• Publication Date: 2014-05-12T08:34:15Z
• Authors: Keigo Otsuka; Taiki Inoue; Shohei Chiashi; Shigeo Maruyama
• Keywords: Exothermic reaction; Electrical breakdown

An organic film-assisted electrical breakdown technique is proposed to selectively remove metallic (m-) single-walled carbon nanotubes (SWNTs) in full length towards creation of pure semiconducting SWNT arrays which are available for the large-scale fabrication field effect transistors (FETs). The horizontally aligned embedded films resulted a maximum removal 16.4 μm. SWNTs was confirmed using scanning electron microscopy and Raman mapping measurements. on/off ratios FETs were improved up ca. 10 000, similar that achieved in-air breakdown. experimental results suggest exothermic oxidation induces propagation reaction, hence long-length m-SWNTs.