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

Chemical Science
William CheungHuixin He

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 the strong π-plasmon absorption of SWNTs in the ultraviolet region is extremely sensitive to ion binding. It is even much more sensitive than the absorption in the visible and NIR regions. Herein, we present our first exploration into using the extremely strong plasmon absorption of SWNTs to develop a new sensing platform for the detection of metallic ions. The detection selectivity is realized by modifying the surface of SWNTs with molecular...Continue Reading

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Citations

Jan 17, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Xue-Jing ZhangMiao Du
Mar 13, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Shuangyan WuEnjun Gao
Aug 16, 2019·Sensors·Banshi D GuptaVivek Semwal
Dec 15, 2020·Advanced Materials·Nan WeiEsko I Kauppinen
Feb 5, 2021·International Journal of Pharmaceutics·Di Fan, Qiaojun Fang
Jun 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Denise Bellotti, Maurizio Remelli
Jun 12, 2018·ACS Applied Materials & Interfaces·Bo NiuLei Jiang
May 4, 2018·Journal of Chemical Theory and Computation·Alexsandro KirchCaetano Rodrigues Miranda
Oct 22, 2021·ACS Applied Materials & Interfaces·Christopher P HoroszkoDaniel A Heller

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Methods Mentioned

BETA
AFM
infrared spectroscopy

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