An increase in the field emission from vertically aligned multiwalled carbon nanotubes caused by NH3 plasma treatment

Field Emission from Lateral Multiwalled Carbon Nanotube Yarn Emitters

“…This current level is enough for field emission display applications. The lateral emitter exhibited a better or comparable field emission performance in comparison with other reported lateral emitters or vertical emitters (Gao et al, 2001;Jo et al, 2003;Seelaboyina et al, 2006;Jang et al, 2010;Chen et al, 2013). For example, the electron emission threshold for a current density of 1 mA/cm 2 was 4 and 6.5 V/μm for the single-walled CNT film prepared using methanol and DMF, respectively, with the gap distance of 165 μm and emission area of 6 mm 2 (Gao et al, 2001).…”

“…Various techniques have been studied to fabricate CNT emitters using as-grown, spraying, electrophoresis, and screen-printing methods, etc. She et al, 2003;Jeong et al, 2006;Jung et al, 2006;Chen et al, 2008Chen et al, , 2013Song et al, 2016). These techniques have mainly focused on field emission from a vertical configuration, i.e., field emission from the tip of CNTs (Jung et al, 2006;Chen et al, 2009Chen et al, , 2012.…”

Ultralow field emission from thinned, open-ended, and defected carbon nanotubes by using microwave hydrogen plasma processing

“…Considering the high density of our CNTs, this FE performance is outstanding. It is far better than a great many well reported CNT emitters such as ion irradiated CNTs [4], CNT-graphene composites [12,13], element doped CNTs [14], chemically processed CNTs [15], NH 3 , oxygen, and nitrogen processed CNTs [16][17][18][19][20]. Replotting of the data as ln(J/E 2 ) versus 1/E, i.e., the F-N plots, as shown in the inset of Fig.…”

“…Plasma treatment is another widely employed strategy. For example, Chen at al reported the FE properties of NH 3 plasma processed CNTs, and they found that the treated CNTs have a much lower E on than that of the untreated ones [16]. Similar strategies have also been used to improve the FE properties of CNTs, such as oxygen [17,18] and nitrogen processing [19,20].…”

Structural, Field Emission and Ammonia Gas Sensing Properties of Multiwalled Carbon Nanotube-Graphene Like Hybrid Films Deposited by Microwave Plasma Enhanced Chemical Vapor Deposition Technique

“…Neupane et al 32 synthesized CNT growth on the copper substrate with the help of nanosphere lithography and studied their field emission properties. Chen et al 33 studied field emission properties of bare CNT and ammonia treated CNT and have found a very high turn-on field up to 11.93 V/ m (corresponding to 0.1 A/cm 2 emission current density) and 8.84 V/ m with the plasma treatment. Pandey et al 34 have studied the field emission properties of morphological disordered graphene, transferred to the silicon substrate and proposed a two barrier model with the first barrier from Si to graphene and the second barrier from graphene to vacuum.…”