Uncommon 2D diamond-like carbon nanodots derived from nanotubes: atomic structure, electronic states, and photonic properties

D W Boukhvalov; D A Zatsepin; Yu A Kuznetsova; V I Pryakhina; A F Zatsepin

doi:10.1039/d3cp01158e

Uncommon 2D diamond-like carbon nanodots derived from nanotubes: atomic structure, electronic states, and photonic properties

Phys Chem Chem Phys. 2023 Jul 5;25(26):17571-17582. doi: 10.1039/d3cp01158e.

Authors

D W Boukhvalov^{1

2}, D A Zatsepin^{2

3}, Yu A Kuznetsova², V I Pryakhina², A F Zatsepin²

Affiliations

¹ College of Science, Institute of Materials Physics and Chemistry, Nanjing Forestry University, Nanjing 210037, P. R. China. danil@njfu.edu.cn.
² Ural Federal University, Mira Street 19, Ekaterinburg 620002, Russia.
³ Institute of Metal Physics, Russian Academy of Sciences, Ural Branch, Yekaterinburg, Russia, 620108.

PMID: 37365886
DOI: 10.1039/d3cp01158e

Abstract

In this article, we report the results of a relatively facile fabrication of carbon nanodots from single-walled and multi-walled carbon nanotubes (SWCNTs and MWCNTs). The results of X-ray photoelectron spectroscopy (XPS) and Raman measurements show that the obtained carbon nanodots are quasi-two-dimensional objects with a diamond-like structure. Based on the characterization results, a theoretical model of the synthesized carbon nanodots was developed. The measured absorption spectra demonstrate the similarity in the local atomic structure of carbon nanodots synthesized from single-walled and multi-walled carbon nanotubes. However, the photoluminescence (PL) spectra of nanodots synthesized from both sources turned out to be completely different. Carbon dots fabricated from MWCNTs exhibit PL spectra similar to those of nanoscale carbon systems with sp³ hybridization and a valuable edge contribution. At the same time nanodots synthesized from SWCNTs exhibit PL spectra which are typical for quantum dots with an estimated size of ∼0.6-1.3 nm.