<i>sp</i><sup>3</sup>-Functionalization of Single-Walled Carbon Nanotubes Creates Localized Spins.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 33306353.
- Also identified by DOI 10.1021/acsnano.0c08782.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Chemical functionalization-introduced <i>sp</i><sup>3</sup> quantum defects in single-walled carbon nanotubes (SWCNTs) have shown compelling optical properties for their potential applications in quantum information science and bioimaging. Here, we utilize temperature- and power-dependent electron spin resonance measurements to study the fundamental spin properties of SWCNTs functionalized with well-controlled densities of <i>sp</i><sup>3</sup> quantum defects. Signatures of isolated spins that are highly localized at the <i>sp</i><sup>3</sup> defect sites are observed, which we further confirm with density functional theory calculations. Applying temperature-dependent line width analysis and power-saturation measurements, we estimate the spin-lattice relaxation time <i>T</i><sub>1</sub> and spin dephasing time <i>T</i><sub>2</sub> to be around 9 μs and 40 ns, respectively. These findings of the localized spin states that are associated with the <i>sp</i><sup>3</sup> quantum defects not only deepen our understanding of the molecular structures of the quantum defects but could also have strong implications for their applications in quantum information science.