Figure 7.

J-E plots of electrical conditionings and FESEM images of the CNT emitter after conditioning processes. (a) Typical J-E plots at different runs of electrical conditioning processes. (b) FESEM image of the CNT emitter after conditioning processes. (c, d) Magnified FESEM images of the regions marked in (b).

Ha et al. Nanoscale Research Letters 2013 8:355   doi:10.1186/1556-276X-8-355
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