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MnO 2 Nanosheets: Birnessite‐Type MnO 2 Nanosheets with Layered Structures Under High Pressure: Elimination of Crystalline Stacking Faults and Oriented Laminar Assembly (Small 3/2015)
Author(s) -
Sun Yugang,
Wang Lin,
Liu Yuzi,
Ren Yang
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201570018
Subject(s) - stacking , hydrothermal circulation , materials science , birnessite , diffraction , phase (matter) , hydrothermal synthesis , high pressure , laminar flow , chemical engineering , crystallography , nanotechnology , optics , chemistry , metallurgy , organic chemistry , manganese oxide , engineering physics , engineering , physics , thermodynamics , oxide
Y. Sun and co‐workers show on page 300 how crystalline stacking faults can be squeezed out under extreme pressure. Birnessite‐type δ‐phase MnO 2 nanosheets with a high concentration of stacking faults are synthesized through a microwave‐assisted hydrothermal process to demonstrate capability of the pressurized strategy for perfecting crystalline lattices. Compressing these MnO 2 nanosheets in a diamond anvil cell up to tens of GPa effectively eliminates the crystalline stacking faults, leading to an increase of symmetry of diffraction peaks.