Field electron emission measurements as a complementary technique to assess carbon nanotube quality
作者： Mateus G Masteghin , Muhammad Ahmad , Mehmet O Tas , Christopher TG Smith , Vlad Stolojan
DOI: 10.1063/1.5142346
关键词: Microstructure 、 Nanotube 、 Analytical chemistry 、 Carbon nanotube 、 Field electron emission 、 Raman spectroscopy 、 Anode 、 Amorphous carbon 、 Electric field 、 Materials science
摘要: Carbon nanotubes (CNTs) can be used in many different applications. Field emission (FE) measurements were together with Raman spectroscopy to show a correlation between the microstructure and field parameters. However, characterization does not suffer from fluorescence noise present spectroscopy. In this study, is characterize vertically aligned CNT forest samples based on their D/G band intensity ratio (ID/IG), FE properties such as threshold electric field, enhancement coefficient, anode tip separation (ATS) at outset of have been obtained. A relationship between ATS first factor, and, subsequently, ATS ID/IG are shown. Based findings, it shown that higher factor (�3070) results when lower (0.45), initial emissions larger distances (�47 lm). For studied, morphology tips did play an important role; therefore, (b) could directly related carbon nanotube structural breaks lattice or amorphous content. Thus, work presents complementary tool evaluate quality samples, advantages alarger probe size averaging over whole length. Correspondingly, one find best emitter according its ID/IG.
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