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@ARTICLE{Raievska:890117,
      author       = {Raievska, Oleksandra and Stroyuk, Oleksandr and Dzhagan,
                      Volodymyr and Solonenko, Dmytro and Zahn, Dietrich R. T.},
      title        = {{U}ltra-small aqueous glutathione-capped {A}g–{I}n–{S}e
                      quantum dots: luminescence and vibrational properties},
      journal      = {RSC Advances},
      volume       = {10},
      number       = {69},
      issn         = {2046-2069},
      address      = {London},
      publisher    = {RSC Publishing},
      reportid     = {FZJ-2021-00706},
      pages        = {42178 - 42193},
      year         = {2020},
      abstract     = {We introduce a direct aqueous synthesis of luminescent 2-3
                      nm Ag-In-Se (AISe) quantum dots (QDs) capped by glutathione
                      (GSH) complexes, where sodium selenosulfate Na2SeSO3 is used
                      as a stable Se2- precursor. A series of size-selected AISe
                      QDs with distinctly different positions of absorption and PL
                      bands can be separated from the original QD ensembles by
                      using anti-solvent-induced size-selective precipitation. The
                      AISe-GSH QDs emit broadband PL with the band maximum varying
                      from 1.65 eV (750 nm) to 1.90 eV (650 nm) depending on the
                      average QD size and composition. The PL quantum yield varies
                      strongly with basic synthesis parameters (ratios of
                      constituents, Zn addition, duration of thermal treatment,
                      etc.) reaching $4\%$ for “core” AISe and $12\%$ for
                      “core/shell” AISe/ZnS QDs. The shape and position of PL
                      bands is interpreted in terms of the model of radiative
                      recombination of a self-trapped exciton. The AISe-GSH QDs
                      reveal phonon Raman spectra characteristic for small and
                      Ag-deficient tetragonal Ag-In-Se QDs. The ability of
                      ultra-small AISe QDs to support such "bulk-like" vibrations
                      can be used for future deeper insights into structural and
                      optical properties of this relatively new sort of QDs.},
      cin          = {IEK-11},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-11-20140314},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113) / 530 - Science and Technology of Nanosystems
                      (POF3-500)},
      pid          = {G:(DE-HGF)POF3-113 / G:(DE-HGF)POF3-530},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000592897600023},
      doi          = {10.1039/D0RA07706B},
      url          = {https://juser.fz-juelich.de/record/890117},
}