研究目的
To examine additional detailed field emission features including FIM/FEM images as well as electron energy spectra to clarify the potential performance of graphitized mechanical pencil lead as field emitters.
研究成果
It is concluded that the fully graphitized pencil lead is promising as low cost but superior field emitters.
研究不足
The edge corner of the sample is slightly rounded during the carbonization process according to the SEM observations possibly due to residual gases. A sufficiently large field enhancement based on the macroscopic shape cannot be expected.
1：Experimental Design and Method Selection:
The study uses a newly developed multi-chamber system consisting of analysis and treatment chambers as well as a sample loading chamber. In the analysis chamber, FIM/FIM images, field emission current, and energy spectra of electrons emitted from the sample are observed.
2：Sample Selection and Data Sources:
The commercially available
3：5 mm mechanical pencil lead (NEOX-GRAPHITE, PILOT Corp., Japan) is used as a field emitter. List of Experimental Equipment and Materials:
Mechanical pencil lead, multi-chamber system, electron energy analyzer.
4：Experimental Procedures and Operational Workflow:
The pencil lead is completely carbonized by heating with electron bombardment in vacuum. The edge corner of the sample is slightly rounded during the carbonization process.
5：Data Analysis Methods:
The energy spectrum is simulated based on the recursion transfer matrix method.
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