sp3-Functionalization of Single-Walled Carbon Nanotubes Creates Localized Spins

Lohmann, Sven-Hendrik; Trerayapiwat, Kasidet Jing; Niklas, Jens; Poluektov, Oleg G.; Sharifzadeh, Sahar; Ma, Xuedan

doi:10.1021/acsnano.0c08782

sp³-Functionalization of Single-Walled Carbon Nanotubes Creates Localized Spins

Journal Article · Fri Dec 11 00:00:00 EST 2020 · ACS Nano

DOI:https://doi.org/10.1021/acsnano.0c08782· OSTI ID:1797960

Lohmann, Sven-Hendrik ^[1]; Trerayapiwat, Kasidet Jing ^[2]; ^[1]; ^[1]; ^[2]; ^[3]

Argonne National Lab. (ANL), Lemont, IL (United States)
Boston Univ., MA (United States)
Argonne National Lab. (ANL), Lemont, IL (United States); Univ. of Chicago, IL (United States)

Chemical functionalization-introduced sp³ 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 sp³ quantum defects. Signatures of isolated spins that are highly localized at the sp³ 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 T₁ and spin dephasing time T₂ to be around 9 μs and 40 ns, respectively. Furthermore, these findings of the localized spin states that are associated with the sp³ 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.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1797960

Journal Information:: ACS Nano, Journal Name: ACS Nano Journal Issue: 12 Vol. 14; ISSN 1936-0851

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
carbon nanotubes
defeats
electron paramagnetic resonance spectroscopy
electron spin resonance
functionalization
quantum mechanics
single-walled carbon nanotubes
sp3 quantum defects
spin coherence time
spin-lattice relaxation time

sp3-Functionalization of Single-Walled Carbon Nanotubes Creates Localized Spins

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sp³-Functionalization of Single-Walled Carbon Nanotubes Creates Localized Spins