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In this article, we report the results of relatively facile fabrication ofcarbon nanodots from single-walled and multi-walled carbon nanotubes (SWCNT andMWCNT). The results of X-ray photoelectron spectroscopy (XPS) and Ramanmeasurements show that the obtained carbon nanodots are quasi-two-dimensionalobjects with a diamond-like structure. Based on the characterization results, atheoretical model of synthesized carbon nanodots was developed. The measuredabsorption spectra demonstrate the similarity of the local atomic structure ofcarbon nanodots synthesized from single-walled and multi-walled carbonnanotubes. However, the photoluminescence (PL) spectra of nanodots synthesizedfrom both sources turned out to be completely different. Carbon dots fabricatedfrom MWCNTs exhibit PL spectra similar to nanoscale carbon systems with sp3hybridization and a valuable edge contribution. At the same time nanodotssynthesized from SWCNTs exhibit PL spectra which are typical for quantum dotswith an estimated size of ~0.6-1.3 nm.

Uncommon 2D Diamond-like Carbon Nanodots Derived from Nanotubes: Atomic Structure, Electronic States and Photonic Properties