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Synthesis and Functionalization of Nitrogen-doped Carbon Nanotube Cups with Gold Nanoparticles as Cork Stoppers
Published on: May 13, 2013
Oriented carbon nanostructures containing nitrogen obtained by ion beam assisted deposition
P Paredez1, C A Figueroa, L F Zagonel
1Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Unicamp 13083-970, Campinas, São Paulo, Brazil.
Journal of Nanoscience and Nanotechnology
|April 28, 2005
Summary
This study details nitrogen-doped graphite layers on nickel nanoparticles, revealing their field emission properties and structural characteristics. Increased nitrogen content enhances disorder in the graphite structure.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Science
Background:
- Nickel nanoparticles are crucial for various catalytic and electronic applications.
- Graphite coatings offer unique electronic and mechanical properties.
- Nitrogen doping can modify the electronic and structural characteristics of carbon materials.
Purpose of the Study:
- To synthesize and characterize nitrogen-doped graphite multilayer structures covering nanometric nickel particles.
- To investigate the influence of nitrogen content on the structural and field emission properties of these composite materials.
Main Methods:
- In-situ ion beam assisted deposition of nitrogen-doped graphite onto nickel nanoparticles.
- Characterization using X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), Raman spectroscopy, and high-resolution transmission electron microscopy (HRTEM).
Main Results:
- Successful deposition of graphite multilayers containing nitrogen onto nickel nanoparticles.
- XPS confirmed the presence of nitrogen within the carbon layer.
- AFM revealed regular domelike structures, while HRTEM confirmed well-organized multiwall graphite layers.
- Raman spectroscopy indicated characteristic graphite and disordered structures, with disorder increasing with nitrogen content.
- Field emission properties of the synthesized structures were evaluated.
Conclusions:
- Nitrogen-doped graphite multilayers can be effectively synthesized on nickel nanoparticles using ion beam assisted deposition.
- The nitrogen content significantly influences the structural disorder of the graphite layers.
- These findings provide insights into the development of novel carbon-based nanomaterials for potential electronic applications.
