Synthesis and electrochemistry of layered double hydroxide thin films by layer-by-layer assembly method

Ugur Unal, Ozge Altuntasoglu, Shintaro Ida, Yasumichi Matsumoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In this study, we have investigated the synthesis of several Layered Double Hydroxides (LDHs), such as Ni-Ga, Mg-Ga and Ni-Al LDHs with hydrothermal method. Total metal content and ratio of the hydrolysis agent in the reaction solution have found to be determining factors for the crystallinity and morphology of LDH products. In addition, we were able to obtain highly crystalline LDHs in a relatively short reaction times, when the reaction was carried out under stirring at moderately higher temperatures. Delamination of LDHs was carried out in formamide and delamination was confirmed by the images obtained from Atomic Force Microscope (AFM), The observed thickness of sheets was in agreement with the theoretical thickness of LDH layers. Delaminated single nanosize sheets were deposited on a substrate by Layer-by-Layer Assembly (LBL) method, which utilizes the electrostatic attraction principles between oppositely charged units. UV-vis spectroscopy of the films showed that deposition of intercalated LDH thin films with LBL was successfu. Electrochemical properties of the films were also investigated in this study. Cyclic voltammograms of the films revealed that LDH layers and intercalated species are electrochemically active. The redox peaks of Ni/Ni2+ couple were observed for Ni2+ containing LDHs in the region of -0.45 V vs Ag/AgCl. In conclusion, we have demonstrated in this study that various LDH nanosize sheets can be intercalated with anionic species in a Layer-by-Layer deposition manner. In addition, LDH thin films prepared by LBL method showed electrochemical response.

Original languageEnglish
Title of host publicationSolid-State Chemistry of Inorganic Materials VI
Pages136-141
Number of pages6
Publication statusPublished - Dec 1 2006
Event2006 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 27 2006Dec 1 2006

Publication series

NameMaterials Research Society Symposium Proceedings
Volume988
ISSN (Print)0272-9172

Other

Other2006 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period11/27/0612/1/06

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Unal, U., Altuntasoglu, O., Ida, S., & Matsumoto, Y. (2006). Synthesis and electrochemistry of layered double hydroxide thin films by layer-by-layer assembly method. In Solid-State Chemistry of Inorganic Materials VI (pp. 136-141). (Materials Research Society Symposium Proceedings; Vol. 988).