π-Plasmon absorption of carbon nanotubes for the selective and sensitive detection of Fe³⁺ ions.

ABSTRACT: Inspired by the remarkable electronic and optical properties of single walled carbon nanotubes (SWNTs), various molecular sensing devices with sensitivity down to the single molecule level have been developed. However, most sensing approaches such as field effect transistors or near infrared (NIR) fluorescence require the rigorous debundling and separation of metallic tubes and semiconducting tubes in order to reach the desired high sensitivity. Interestingly, all carbon nanomaterials including carbon nanotubes, graphite, graphene, and even amorphous carbon exhibit extremely strong π-plasmon absorption in the ultraviolet region. This strong absorption has been studied as an undesired optical background for applications based on visible and NIR absorptions. For the first time, we found that

SUBMITTER: Cheung W 

PROVIDER: S-EPMC6020252 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature