<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Luminescent Defects in Polymer-Wrapped\r\nCarbon Nanotubes: Synthesis, Properties and Applications"^^ . "Narrowband photoluminescence (PL) in the near-infrared and electrical exciton generation make semiconducting single-walled carbon nanotubes (SWNTs) promising\r\nmaterials for optoelectronic devices. The functionalization of SWNTs with luminescent\r\nsp3 defects offers synthetically tunable light emission and enhances their potential\r\nfor applications such as quantum light sources, bioimaging and sensing. However,\r\nthe synthetic protocols that are currently used to create these defects are limited to\r\naqueous dispersions of SWNTs, which are compromised by short tube lengths, residual\r\nmetallic SWNTs and poor solution-processability. Here, the combination of highly\r\nselective polymer-sorting and shear force mixing as a mild exfoliation method provides\r\nelectronically-pure (6,5) SWNTs in toluene with average tube lengths > 1 µm and\r\nstrategies for their sp3\r\nfunctionalization are developed based on simple diazonium\r\nchemistry.\r\nThe complexation by an ether crown allows for the solubilization of commercially\r\navailable aryldiazonium salts in organic solvents and thus enables their reaction with\r\npolymer-wrapped SWNTs. The resulting defect-tailored (6,5) SWNTs show a relatively\r\nhigh photoluminescence quantum yield (PLQY) of up to 4 % with 90 % of photons\r\nemitted from the sp3 defect. The dependence of the defect-induced PL brightening on\r\nthe nanotube length indicates that the PLQY of the pristine SWNT may exceed that of\r\nthe sp3 defect for a sufficiently high nanotube quality.\r\nBy using custom-synthesized diazonium salts in a modified protocol, stable organic\r\nradicals are covalently attached to purified semiconducting SWNTs via luminescent\r\naryl defects. The proximity between the defect-localized exciton and the unpaired\r\nelectron promotes spin exchange and electron transfer processes, which are identified\r\nthrough time-resolved PL measurements. The results point toward an increased yield of triplet excitons due to radical-enhanced intersystem crossing, which could serve as\r\na general concept to probe triplet states in SWNTs.\r\nThe dispersion in organic solvents facilitates the integration of defect-tailored, polymer-wrapped SWNTs into optoelectronic devices. A planar dielectric waveguide structure\r\nchannels the PL emitted from sp3 defects over distances > 1 mm and thus represents\r\na first step toward their interfacing with photonic circuits and photovoltaic devices.\r\nMoreover, the demonstration of electroluminescence from sp3 defects in light-emitting\r\nfield-effect transistors underpins their potential for electrically-driven single-photon\r\nsources."^^ . "2021" . . . . . . . "Felix Julian"^^ . "Berger"^^ . "Felix Julian Berger"^^ . . . . . . "Luminescent Defects in Polymer-Wrapped\r\nCarbon Nanotubes: Synthesis, Properties and Applications (PDF)"^^ . . . "Dissertation_Felix_Berger_Veroeffentlichung_PDFA.pdf"^^ . . . "Luminescent Defects in Polymer-Wrapped\r\nCarbon Nanotubes: Synthesis, Properties and Applications (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Luminescent Defects in Polymer-Wrapped\r\nCarbon Nanotubes: Synthesis, Properties and Applications (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Luminescent Defects in Polymer-Wrapped\r\nCarbon Nanotubes: Synthesis, Properties and Applications (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Luminescent Defects in Polymer-Wrapped\r\nCarbon Nanotubes: Synthesis, Properties and Applications (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Luminescent Defects in Polymer-Wrapped\r\nCarbon Nanotubes: Synthesis, Properties and Applications (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #29973 \n\nLuminescent Defects in Polymer-Wrapped \nCarbon Nanotubes: Synthesis, Properties and Applications\n\n" . "text/html" . . . "540 Chemie"@de . "540 Chemistry and allied sciences"@en . .