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Figure 4 | Nanoscale Research Letters

Figure 4

From: Effect of Purity and Substrate on Field Emission Properties of Multi-walled Carbon Nanotubes

Figure 4

(a) Field emission characteristics of as-grown MWNT spin coated over carbon paper with and without graphitic layer (sample A and sample B) and that of purified MWNT spin coated over carbon paper with and without graphitic layer (sample C and sample D), (b) Fowler–Nordheim plots of as-grown MWNT spin coated over carbon paper with and without graphitic layer (sample A and sample B) and that of purified MWNT spin coated over carbon paper with and without graphitic layer (sample C and sample D)

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