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Dielectric and Infrared Spectroscopy Characterization of Co–Al Layered Double Hydroxides
Author(s) -
Zamaraite Ilona,
Vieira Daniel E. L.,
Vieira Luís G.,
Ribeiro José L.,
Vieira Joaquim M.,
Salak Andrei N.,
Banys Jūras
Publication year - 2021
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.202100106
Subject(s) - layered double hydroxides , dielectric , spectroscopy , materials science , characterization (materials science) , infrared spectroscopy , infrared , relaxation (psychology) , cobalt , dielectric spectroscopy , analytical chemistry (journal) , chemical physics , inorganic chemistry , nanotechnology , chemistry , optoelectronics , optics , hydroxide , electrochemistry , electrode , social psychology , psychology , physics , organic chemistry , quantum mechanics , chromatography , metallurgy
Layered double hydroxides (LDHs) are natural 2D materials with promising functionalities. A comprehensive understanding of physical properties (such as electrical or optical) is critical for their current and future applications. Herein, dielectric and infrared spectroscopy to extensively characterize thermal behavior of dynamic effects in cobalt–aluminum LDH with Co‐to‐Al ratio of 2 and intercalated with nitrate is applied. The dielectric response of the vacuum‐dried LDH shows noticeable relaxation processes in the radio frequency range. A detailed analysis of the relaxations allows assigning them to the dynamics of water clusters confined in the interlayer. Infrared spectroscopy enables the characterization of bands attributed to the OH stretching of these water clusters. It is found that a decrease in temperature results in freezing of the water clusters in the interlayers and in the coexistence of water‐like and ice‐like clusters network in this LDH.