Covalently Functionalized Metallic Single-Walled Carbon Nanotubes Studied Using Electrostatic Force Microscopy and Dielectric Force Microscopy

• Published in: Journal of physical chemistry. C Vol. 117; no. 46; pp. 24570 - 24578
• Main Authors: Zhang, Kang, Marzari, Nicola, Zhang, Qing
• Format: Journal Article
• Language: English
• Published: Columbus, OH American Chemical Society 21.11.2013
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Electron states and collective excitations in thin films, multilayers, quantum wells, mesoscopic and nanoscale systems; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Electronic structure of nanoscale materials : clusters, nanoparticles, nanotubes, and nanocrystals; Exact sciences and technology; Materials science; Nanoscale materials and structures: fabrication and characterization; Nanotubes; Physics; Chemical modification; Singlewalled nanotube; Electronic properties; Electronic structure; Functionalization; Metallicity; Electrostatic force microscopy; Force microscopy; Hybridization; Carbon; Metallic bonds
• ISSN: 1932-7447; 1932-7455
• DOI: 10.1021/jp4076178

Contactless electrostatic force microscopy (EFM) and dielectric force microscopy (DFM) are demonstrated to be very powerful tools of characterizing the electronic properties of individual single-walled carbon nanotubes (SWCNTs). Taking the advantages of the tools, we confirm that the metallicity of metallic SWCNTs can be largely preserved upon dichlorocarbene functionalization ([2 + 1] cycloaddition) in comparison with the SWCNTs subject to the Prato reaction ([2 + 3] cycloaddition). This work demonstrates the distinct difference between sp2 rehybridized and sp3 rehybridized covalent configurations on their influences to electronic properties of metallic SWCNTs and supports the hypothesis that [2 + 1] cycloaddition could recover the sp2 hybridization on the sidewall of metallic SWCNTs and preserve the intrinsic electronic properties of SWCNTs.