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Coordination-Polymeric Nanofibers and their Field-Emission Properties
Sudip K Batabyal1, Abdul Malik Puthan Peedikakkal, Seeram Ramakrishna
1Department of Chemistry, National University of Singapore, Singapore 117543.
Macromolecular Rapid Communications
|June 4, 2011
Summary
Researchers developed a new method to create coordination polymer (CP) nanofibers using gel precursors and electrospinning. This technique enables large-scale fabrication of these novel materials for potential applications in field-emission technologies.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Chemistry
Background:
- Coordination polymers (CPs) are crystalline materials with diverse applications.
- Fabricating CPs into nanoscale structures like nanofibers is challenging.
- Existing methods often require organic polymeric additives.
Purpose of the Study:
- To report the first large-scale fabrication of coordination polymer (CP) nanofibers.
- To develop a method using CP gel precursors without organic additives.
- To explore the properties of these novel CP nanofibers.
Main Methods:
- Preparation of CP gel precursors by mixing metal salts (Ni(OAc)2) and ligands (4-trifluoromethylbenzoic acid with 4,4'-bis(pyridyl)ethylene or 4,4'-bipyridine).
- Dilution of gel precursors in organic solvents to create viscous solutions.
- Electrospinning of these solutions to form nanofibers.
Main Results:
- Successful large-scale fabrication of coordination polymer nanofibers.
- Characterization suggests one-dimensional polymeric structures for the gels and fibers.
- The synthesized nanofibers exhibit interesting field-emission properties.
Conclusions:
- A novel, additive-free electrospinning method for CP nanofibers has been established.
- The findings open avenues for processing one-dimensional coordination polymers.
- The field-emission properties suggest potential applications in electronic devices.
