Interaction of Luminescent Defects in Carbon Nanotubes with Covalently Attached Stable Organic Radicals
Source abstract
Abstract
The functionalization of single-walled carbon nanotubes (SWCNTs) with luminescent sp3 defects has greatly improved their performance in applications such as quantum light sources and bioimaging. Here, we report the covalent functionalization of purified semiconducting SWCNTs with stable organic radicals (perchlorotriphenylmethyl, PTM) carrying a net spin. This model system allows us to use the near-infrared photoluminescence arising from the defect-localized exciton as a highly sensitive probe for the short-range interaction between the PTM radical and the SWCNT. Our results point toward an increased triplet exciton population due to radical-enhanced intersystem crossing, which could provide access to the elusive triplet manifold in SWCNTs. Furthermore, this simple synthetic route to spin-labeled defects could enable magnetic resonance studies complementary to in vivo fluorescence imaging with functionalized SWCNTs and facilitate the scalable fabrication of spintronic devices with magnetically switchable charge transport.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Carbon Nanotubes in Composites · Luminescence and Fluorescent Materials · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute for Physical Chemistry, Universität Heidelberg, 69120 Heidelberg, Germany
Centre for Advanced Materials, Universität Heidelberg, 69120 Heidelberg, Germany
Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain
Laboratorio de Electroquímica, Departamento de Química, Facultad de Ciencias, Universidad de los Andes, 5101 Mérida, Venezuela
Faculty of Physics, Munich Quantum Center and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, 80539 München, Germany
Munich Center for Quantum Science and Technology (MCQST), 80799 München, Germany
Funding
Deutsche Forschungsgemeinschaft · Departament d'Universitats, Recerca i Societat de la Informació · Alexander von Humboldt-Stiftung · H2020 European Research Council · MICIU of Spain · Severo Ochoa FUNFUTURE
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