“…Carbon nanotube (CNT) has been considered as one of the most ideal field emission cathode materials due to its relatively high length diameter ratio, good thermal conductivity, and tip sharp structure. [1][2][3] Also CNT always has high mechanical strength and good chemical stability, which can greatly benefit the stage containing package of field emission display (FED). [4][5][6][7] In the past few decades, many institutions, such as American Motorola, 8) France LETI, 9,10) South Korean Samsung, [11][12][13] and Japanese ISE 14) have carried out extensive studies covering field emission materials, devices fabrication and related theories.…”