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Single-crystalline GdB6 nanowire field emitters
Han Zhang1, Qi Zhang, Gongpu Zhao
1Curriculum in Applied and Materials Sciences, University of North Carolina, Chapel Hill, North Carolina 27599-3255, USA.
Journal of the American Chemical Society
|September 22, 2005
Summary
Gadolinium hexaboride (GdB6) nanowires were synthesized with a low work function. These GdB6 nanowires demonstrate efficient field emission, making them promising for electronic applications.
Area of Science:
- Materials Science
- Nanotechnology
- Condensed Matter Physics
Background:
- Rare-earth hexaborides are known for their unique electronic properties.
- Low work function materials are crucial for efficient electron emission.
Purpose of the Study:
- To synthesize GdB6 nanowires with controlled morphology.
- To investigate the field emission properties of GdB6 nanowires.
- To determine the work function of GdB6 nanowire field emitters.
Main Methods:
- Chemical Vapor Deposition (CVD) method for nanowire synthesis.
- Characterization of nanowire morphology and crystal structure.
- Fabrication and testing of single nanowire field emitters.
Main Results:
- Successfully produced GdB6 nanowires with rectangular cross-sections (approx. 50 nm lateral dimension).
- Nanowires grown along the 001 lattice direction, with {100} lattice planes on surfaces.
- Achieved field emission current >150 nA at <3.2 V/µm.
- Estimated work function of the GdB6 nanowire emitter is ~1.5 eV.
Conclusions:
- GdB6 nanowires are a novel material with potential for field emission devices.
- The synthesized nanowires exhibit excellent field emission performance due to their low work function.
- This research opens avenues for developing advanced electron sources.