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@ARTICLE{Prymak:878394,
      author       = {Prymak, Oleg and Grasmik, Viktoria and Loza, Kateryna and
                      Heggen, Marc and Epple, Matthias},
      title        = {{T}emperature-{I}nduced {S}tress {R}elaxation in {A}lloyed
                      {S}ilver–{G}old {N}anoparticles (7–8 nm) by in {S}itu
                      {X}-ray {P}owder {D}iffraction},
      journal      = {Crystal growth $\&$ design},
      volume       = {20},
      number       = {1},
      issn         = {1528-7505},
      address      = {Washington, DC},
      publisher    = {ACS Publ.},
      reportid     = {FZJ-2020-02830},
      pages        = {107 - 115},
      year         = {2020},
      abstract     = {Alloyed silver–gold nanoparticles (spherical, 8 nm) were
                      wet-chemically prepared by reduction with sodium
                      citrate/tannic acid and colloidally stabilized by
                      poly(N-vinylpyrrolidone) (PVP), in steps of 10 atom $\%,$
                      including pure silver nanoparticles (35 nm) and pure gold
                      nanoparticles (7 nm). The nanoparticles were subjected to in
                      situ X-ray powder diffraction up to 850 °C to induce
                      internal stress relaxation and recrystallization. The
                      stress-induced negative deviation from Vegard’s rule that
                      was present in the original alloyed nanoparticles vanished
                      between 150 and 250 °C, indicating the internal healing of
                      defects. Simultaneously, a discontinuous increase in the
                      crystallite size and a drop in the microstrain were
                      observed. After heating to 850 °C, the original gradient
                      structure (silver-rich shell, gold-rich core) had changed to
                      a homogeneous elemental distribution as shown by high-angle
                      annular dark-field scanning transmission electron
                      microscopy/energy-dispersive X-ray spectroscopy (STEM/EDX).
                      Thus, there is a considerable mobility of the metal atoms
                      inside the nanoparticles that starts as low as 150 °C.},
      cin          = {ER-C-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)ER-C-1-20170209},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)
                      / DFG project 286659497 - Bimetallische Nanopartikel der
                      Platinmetalle (Ru, Rh, Pd, Os, Ir, Pt) und des Silbers:
                      Synthese, Mikrostruktur und biologische Wirkung (286659497)
                      / DFG project 257727131 - Nanoskalige Pt
                      Legierungselektrokatalysatoren mit definierter Morphologie:
                      Synthese, Electrochemische Analyse, und ex-situ/in-situ
                      Transmissionselektronenmikroskopische (TEM) Studien
                      (257727131)},
      pid          = {G:(DE-HGF)POF3-143 / G:(GEPRIS)286659497 /
                      G:(GEPRIS)257727131},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000506088200016},
      doi          = {10.1021/acs.cgd.9b00728},
      url          = {https://juser.fz-juelich.de/record/878394},
}