Endohedral Functionalization of Metallicity-Sorted Single-Walled Carbon Nanotubes

Marianna V Kharlamova,Thomas Pichler,Dominik Eder,Andreas Mittelberger,Oleg Domanov,Christian Kramberger,Kazuhiro Yanagi

doi:10.3390/proceedings2020056033

Abstract

We performed endohedral functionalization of high-purity metallicity-sorted semiconducting and metallic single-walled carbon nanotubes (SWCNTs) with a mean diameter of 1.4 nm with silver chloride (AgCl) by the method of capillary filling with the melt. The AgCl-filled SWCNTs were investigated by high-resolution scanning transmission electron microscopy and spectroscopic techniques, such as Raman spectroscopy, X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy, which were combined to study comprehensively the modified electronic properties of the filled SWCNTs. The data revealed a downshift of the Fermi level of the nanotubes upon filling, i.e., a p-doping of SWCNTs.

Highlights

Single-walled carbon nanotubes (SWCNTs) have attracted ever-increasing attention from the research community due to their extraordinary physical and chemical properties and unique onedimensional structure
We performed the filling of high-purity semiconducting and metallic single-walled carbon nanotubes (SWCNTs) with a mean diameter of 1.4 nm with silver chloride (AgCl), which is an insulator and potential electron acceptor and which melts at moderate temperatures, by the method of capillary filling with the melt, and we investigated the electronic properties of the filled SWCNTs
The filling of the SWCNTs was analyzed by high-resolution scanning transmission electron microscopy (HR STEM), and the electronic properties of the filled nanotubes were studied by spectroscopic techniques, such as Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS)

Summary

Introduction

Single-walled carbon nanotubes (SWCNTs) have attracted ever-increasing attention from the research community due to their extraordinary physical and chemical properties and unique onedimensional structure. This makes them promising candidates for various applications, including nanoelectronics, energy storage, sensors and nanomedicine. The encapsulation of electron donors and acceptor substances inside SWCNTs opens the way for tailoring the electronic properties of nanotubes for specific applications [1] In this contribution, we performed the filling of high-purity semiconducting and metallic SWCNTs with a mean diameter of 1.4 nm with silver chloride (AgCl), which is an insulator and potential electron acceptor and which melts at moderate temperatures, by the method of capillary filling with the melt, and we investigated the electronic properties of the filled SWCNTs

Methods

Results

Conclusion