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Surface modification of CNT-cathodes by an acid-erosion process

Yunsong Di1,2, Xiaxi Yang1, Wei Lei1,4, Xiaobing Zhang1, Yunkang Cui1, Qilong Wang1 and Guodong Yang3

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We describe the preparation and properties of a carbon nanotube (CNT) paste for screen-printing CNT-cathodes. Inorganic binders have been added to the paste to improve the adhesion to the substrate and Zn powder has been added to reduce the loss of CNTs during thermal processing. An efficient method called the acid-erosion process has been introduced to improve the surface morphology of the CNT-cathodes made with the paste. The surface modification was verified with electron microscopic analyses, while the improvements in field emission and emission uniformity were quantified in a diode structure.


PACS

68.35.Np Adhesion

85.45.Fd Field emission displays (FEDs)

68.37.Hk Scanning electron microscopy (SEM) (including EBIC)

61.46.Fg Nanotubes

79.70.+q Field emission, ionization, evaporation, and desorption

81.65.Cf Surface cleaning, etching, patterning

Subjects

Condensed matter: electrical, magnetic and optical

Electronics and devices

Surfaces, interfaces and thin films

Nanoscale science and low-D systems

Dates

Issue 50 (19 December 2007)

Received 14 July 2007, in final form 21 October 2007

Published 20 November 2007



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