Selective oxidation of semiconducting single-wall carbon nanotubes by hydrogen peroxide

Selective oxidation of single-wall carbon nanotubes (SWCNTs) by H2O2 was conducted at varying heating times. This process was monitored by UV-vis-NIR spectroscopy resulting in a major increase in the relative absorption intensity that indicated a higher than 80% concentration of metallic SWCNTs in the final product.