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@ARTICLE{Radovsky:201766,
      author       = {Radovsky, Gal and Popovitz-Biro, Ronit and Stroppa, Daniel
                      G. and Houben, Lothar and Tenne, Reshef},
      title        = {{N}anotubes from {C}halcogenide {M}isfit {C}ompounds:
                      {S}n–{S} and {N}b–{P}b–{S}},
      journal      = {Accounts of chemical research},
      volume       = {47},
      number       = {2},
      issn         = {1520-4898},
      address      = {Columbus, Ohio},
      publisher    = {American Chemical Soc.},
      reportid     = {FZJ-2015-04060},
      pages        = {406 - 416},
      year         = {2014},
      abstract     = {Carbon fullerenes and nanotubes revolutionized
                      understandingof the reactivity of nanoscale compounds.
                      Subsequently, our group and others discovered analogous
                      inorganic compounds with hollow, closed nanostructures. Such
                      inorganic nanostructures offer many applications,
                      particularly in the energy and electronics industries.One
                      way to create inorganic nanostructures is via misfit
                      layer-ed compounds (MLC), which are stacks of alternating
                      two-dimensional molecular slabs, typically held together via
                      weak van der Waals forces. They contain “misfits” in
                      their a–b plane structures that can make them unstable,
                      leading to collapse of the slabs into tubular
                      nanostructures. For example, metal chalcogenide MLCs of the
                      general formula (MX)1+y/TX2 (M = Sn, Pb, Bi, Sb, and other
                      rare earths; T = Sn, Ti, V, Cr, Nb, Ta, etc.; X = S or Se)
                      consist of a superstructure of alternating layers where the
                      MX unit belongs to a (distorted NaCl) orthorhombic symmetry
                      group (O), the TX2 layer possesses trigonal (T) or
                      octahedral symmetry, and the two layers are held together
                      via both van der Waals and polar forces. A misfit in the a
                      axis or both a and b axes of the two sublattices may lead to
                      the formation of nanostructures as the lattices relax via
                      scrolling. Previous research has also shown that the
                      abundance of atoms with dangling bonds in the rims makes
                      nanoparticles of compounds with layered structure unstable
                      in the planar form, and they tend to fold into hollow closed
                      structures such as nanotubes.This Account shows that
                      combining these two triggers, misfits and dangling bond
                      annihilation in the slab rims, leads to new kinds of
                      nanotubes from MLCs. In particular, we report the structure
                      of two new types of nanotubes from misfits, namely, the
                      SnS/SnS2 and PbS/NbS2 series. To decipher the complex
                      structures of these nanotubes, we use a range of methods:
                      high-resolution transmission electron microscopy (HRTEM),
                      energy-dispersive X-ray spectroscopy (EDS), selected area
                      electron diffraction (SAED) analyses, scanning electron
                      microscopy (SEM), and Cs-corrected scanning transmission
                      electron microscopy (STEM) in the high-angle annular
                      dark-field mode (HAADF). In both new types, the lattice
                      mismatch between the two alternating sublayers dictates the
                      relative layer-stacking order and leads to a variety of
                      chiral tubular structures. In particular, the
                      incommensuration (a type of misfit) of the SnS2/SnS system
                      in both the (in plane) a and b directions leads to a variety
                      of relative in-plane orientation and stacking orders along
                      the common c-axis. Thus the SnS/SnS2 nanotubes form
                      superstructures with the sequence O–T and O–T–T, and
                      mixtures thereof. We also report nanotubes of the misfit
                      layered compound (PbS)1.14NbS2, and of NbS2 intercalated
                      with Pb atoms, with the chemical formula PbNbS2. Thus, the
                      possibility to use two kinds of folding mechanisms jointly
                      offers a new apparatus for the synthesis of unique 1-D
                      nanostructures of great complexity and a potentially large
                      diversity of physicochemical properties.},
      cin          = {PGI-5},
      ddc          = {540},
      cid          = {I:(DE-Juel1)PGI-5-20110106},
      pnm          = {42G - Peter Grünberg-Centre (PG-C) (POF2-42G41)},
      pid          = {G:(DE-HGF)POF2-42G41},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000331775200012},
      doi          = {10.1021/ar400138h},
      url          = {https://juser.fz-juelich.de/record/201766},
}