Single-Walled Carbon Nanotubes Studied by Nuclear Magnetic Resonance

University Of North Carolina At Chapel Hill, Chapel Hill NC

Investigators

Abstract

This research is focused on investigation of single-walled carbon nanotubes (SWNTs) using nuclear magnetic resonance (NMR). The one-dimensional structural characteristics of SWNTs could lead to novel correlated electronic states which is one of the most fundamental issues in condensed matter physics. NMR will be used to examine the correlation of electrons in SWNTs. The properties of SWNTs can be modified by Li and K intercalations and NMR will be used to investigate the intercalation mechanism and characterize changes of electronic properties. This could lead to new methods for tailoring the properties of SWNTs with applications including Li batteries. Finally, the accessibility of SWNTs by gas molecules and the characteristics of adsorption will be investigated. This study provides insight into the nano-confinement effects on nanofluids and could provide crucial information for the development of SWNT-based molecular sensors and filters. This research provides an excellent opportunity for students to acquire a broad knowledge and research capabilities including novel materials synthesis, state-of-the-art spectroscopy, fundamental physics, and applications suitable for a wide range of careers including in academe, industry, and government. This research is focused on investigation of single-walled carbon nanotube (SWNT), a seamless cylinder formed by wrapping a graphene sheet. The study aims at understanding the electronic properties, especially novel characteristics associated with the one-dimensional nature of the structure. Modifications of SWNT properties by lithium and potassium intercalations will also be explored with potential applications such as high-density lithium batteries. Trapping of ambient gas molecules inside the tubes of SWNTs will be studied. This could lead to sensitive molecular sensors and efficient gas filters. The main technique to be used is nuclear magnetic resonance, which provides detailed information on structures, molecular motion, and electronic properties. This research provides an excellent opportunity for students to acquire a broad knowledge and research capabilities including novel materials synthesis, state-of-the-art spectroscopy, fundamental physics, and applications suitable for a wide range of careers including in academe, industry, and government. It will also attract high school and undergraduate students to the exciting field of nanotechnology.