TY - JOUR
T1 - Solid-solid and gas-solid interactions induced during high-energy milling to produce PbTe nanopowders
AU - Rojas-Chávez, H.
AU - Reyes-Carmona, F.
AU - Garibay-Febles, V.
AU - Jaramillo-Vigueras, D.
N1 - Funding Information:
Acknowledgments This study was partially supported by: Consejo Nacional de Ciencia y Tecnología de México (CONACyT), SIP-IPN and COFAA-IPN. One of the authors (H. Rojas-Chávez) would like to thank CONACyT for the financial support extension. The authors are grateful to P. Castillo (UAM-I) and N. Daneu (Jozeˇf Stefan Institute) for their technical support.
PY - 2013/5
Y1 - 2013/5
N2 - Transformations from precursors to nanoparticles by high-energy milling are promoted by two major driving forces, namely physical and/or chemical. While the former has been difficult to trace since stress, strain and recovery may occur almost simultaneously during milling, the latter has been sequentially followed as an evolution from precursors to intermediate phases and thereof to high purity nanocrystals. The specific objective of this work is to discern how solid-solid and partially solid-gas reactions manifest themselves correspondingly as a short-range diffusion through an interface or how vapor species, as a subliming phenomenon, grows as a different phase on an active local surface. These series of changes were traced by sub-cooling the as-milled powders extracted during a milling cycle. Through this experimental technique, samples were electron microscopically analyzed and where it was required, selected area electron diffraction images were obtained. High-resolution transmission electron microscopy results, unambiguously, confirm that nanocrystals in the last stage show a cubic morphology which average size distributions are around 17 nm.
AB - Transformations from precursors to nanoparticles by high-energy milling are promoted by two major driving forces, namely physical and/or chemical. While the former has been difficult to trace since stress, strain and recovery may occur almost simultaneously during milling, the latter has been sequentially followed as an evolution from precursors to intermediate phases and thereof to high purity nanocrystals. The specific objective of this work is to discern how solid-solid and partially solid-gas reactions manifest themselves correspondingly as a short-range diffusion through an interface or how vapor species, as a subliming phenomenon, grows as a different phase on an active local surface. These series of changes were traced by sub-cooling the as-milled powders extracted during a milling cycle. Through this experimental technique, samples were electron microscopically analyzed and where it was required, selected area electron diffraction images were obtained. High-resolution transmission electron microscopy results, unambiguously, confirm that nanocrystals in the last stage show a cubic morphology which average size distributions are around 17 nm.
KW - Gas-solid reaction
KW - Lead telluride
KW - Recrystallization
KW - Solid-state reaction
KW - Structural defects
UR - http://www.scopus.com/inward/record.url?scp=84879241658&partnerID=8YFLogxK
U2 - 10.1007/s11051-013-1623-4
DO - 10.1007/s11051-013-1623-4
M3 - Artículo
SN - 1388-0764
VL - 15
JO - Journal of Nanoparticle Research
JF - Journal of Nanoparticle Research
IS - 5
M1 - 1623
ER -