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Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
Polyoxometalate-based layered structures for charge transport control in molecular devices
Antonios M Douvas1, Eleni Makarona, Nikos Glezos
1Institute of Microelectronics, National Center of Scientific Research "Demokritos", 15310 Aghia Paraskevi, Athens, Greece.
ACS Nano
|February 12, 2009
Summary
Hybrid organic-inorganic films using polyoxometalates (POMs) and 1,12-diaminododecane were fabricated for electronic devices. These POM-based multilayers show potential for memory applications due to their unique conduction mechanisms.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Chemistry
Background:
- Hybrid organic-inorganic films offer unique properties for advanced electronic applications.
- Polyoxometalates (POMs), specifically Keggin-structure 12-tungstophosphoric acid, are explored for their electronic potential.
- Layer-by-layer (LBL) self-assembly provides a controlled method for fabricating molecular multilayers.
Purpose of the Study:
- To evaluate hybrid organic-inorganic films composed of POMs and 1,12-diaminododecane (DD) as molecular materials for electronic devices.
- To investigate the impact of fabrication parameters, particularly solution composition, on the structural properties of POM-based multilayers.
- To elucidate the conduction mechanisms within these fabricated films.
Main Methods:
- Fabrication of hybrid films using the layer-by-layer (LBL) self-assembly method on 3-aminopropyl triethoxysilane (APTES)-modified silicon surfaces.
- Characterization of film structure and composition using spectroscopic techniques including UV-Vis, FTIR, and XPS.
- Electrical characterization of single-layered and multilayered films, supported by theoretical analysis.
Main Results:
- Reproducible and well-characterized POM-based single-layers and multilayers were successfully fabricated.
- The structural characteristics of the POM-based films were found to be significantly influenced by the deposition solution compositions.
- Electrical characterization revealed Fowler-Nordheim (FN) tunneling and percolation as dominant conduction mechanisms.
Conclusions:
- The fabricated hybrid POM-based films exhibit controllable structural characteristics and distinct conduction mechanisms.
- The findings support the potential of these molecular materials for use in electronic devices, particularly in memory applications.
- Further investigation into these POM-based multilayers is warranted for advanced electronic and memory device development.
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