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Inorganic nanoparticle multilayers using photo-crosslinking layer-by-layer assembly and their applications in
Sanghyuk Cheong1, Younghoon Kim, Taegyun Kwon
1Department of Chemical and Biological Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-713, Korea. jinhan71@korea.ac.kr.
Nanoscale
|October 29, 2013
Summary
We developed a simple method to create nanoparticle nanocomposite multilayer films. This technique enables vertical growth of nanoparticle layers for advanced electronic devices.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Traditional nanoparticle (NP) film assembly often requires complex surface modifications or polymer interlayers.
- Existing methods for NP-based devices like memory layers typically involve high-temperature thermal treatments.
Purpose of the Study:
- To introduce a facile and general method for preparing organic/inorganic nanoparticle (NP) nanocomposite multilayer films.
- To demonstrate the application of these films in nonvolatile memory devices without high-temperature processing.
Main Methods:
- Utilized successive photo-crosslinking layer-by-layer (LbL) assembly between hydrophobic ligands and photoinitiator molecules on NP surfaces.
- Achieved vertical growth of densely packed NP layers (metal or transition metal oxide NPs).
Main Results:
- The method avoids additional surface modification for NPs and eliminates the need for polymer bridging layers.
- Photo-crosslinking LbL-assembled metal oxide NP films functioned as nonvolatile memory layers.
- Demonstrated memory device functionality without requiring thermal treatments above 200 °C.
Conclusions:
- This robust photo-crosslinking LbL assembly offers a facile route for fabricating functional NP-based electronic devices.
- The method simplifies NP film preparation and enables low-temperature processing for device applications.
