Improved field emission at electric-discharge-conditioned sites on diamond surfaces due to the formation of carbon nanotubes

Koenigsfeld, N.; Kalish, R.; Hoffman, A.
June 2003
Applied Physics Letters;6/30/2003, Vol. 82 Issue 26, p4687
Academic Journal
The role of local materials modification to field emission (FE) from diamond is studied. FE properties of a boron-doped hydrogenated diamond film containing an array of sp[SUP2] rich channels that extend from surface to substrate and of diamond films subjected to an electric discharge are reported. Whereas the implantation-graphitized regions do not show any improvement in emission properties, compared to unirradiated or fully irradiated regions of the same sample, much improved emission is found for all regions once conditioned by an electric discharge. We show that carbon nanowhiskers (most likely carbon nanotubes) were formed in the vicinity of all conditioned sites and can account for the improved emission following ''conditioning'' that have been reported for many carbon-based field emitters.


Related Articles

  • Universal field-emission model for carbon nanotubes on a metal tip. Zhong, D. Y.; Zhang, G. Y.; Liu, S.; Sakurai, T.; Wang, E. G. // Applied Physics Letters;1/21/2002, Vol. 80 Issue 3, p506 

    Electron-field-emission properties have been investigated systematically for carbon nanotubes (CNTs) fabricated on a metal tip. With a vacuum gap of 0.7 mm, the threshold field is as low as 0.7 V/μm and the current density approaches 10 mA/cm[sup 2] at an electronic field of 1.0 V/μm. The...

  • Study of the field-screening effect of highly ordered carbon nanotube arrays. Suh, Jung Sang; Jeong, Kwang Seok; Lee, Jin Seung; Han, Intaek // Applied Physics Letters;4/1/2002, Vol. 80 Issue 13, p2392 

    We have studied the field-screening effect provoked by the proximity of neighboring tubes by changing the tube height of highly ordered carbon nanotubes fabricated on porous anodic aluminum oxide templates. The field emission was critically affected by the tube height that protruded from the...

  • Uniform field emission from aligned carbon nanotubes prepared by CO disproportionation. Lee, Jin Seung; Suh, Jung Sang // Journal of Applied Physics;12/15/2002, Vol. 92 Issue 12, p7519 

    We have fabricated aligned carbon nanotubes (CNTs) by disproportionation of CO on a well-ordered Co nanowire array prepared on a porous anodic aluminum oxide (AAO) template using overdeposition and etching techniques, and studied their field emission properties. CNTs fabricated at 600°C were...

  • Field emission of large-area and graphitized carbon nanotube array on anodic aluminum oxide template. Gao, Han; Mu, Cheng; Wang, Fan; Xu, Dongsheng; Wu, Kai; Xie, Youchang; Liu, Shuang; Wang, Enge; Xu, Jun; Yu, Dapeng // Journal of Applied Physics;5/1/2003, Vol. 93 Issue 9, p5602 

    Large-area, graphitized, and patterned carbon nanotube (CNT) arrays were prepared via cracking of ethylene on an open-ended anodized aluminum oxide (AAO) template that also served as a catalyst. With ion-milling and gold coating techniques, ohmic contact between the CNTs and electrode for field...

  • In-situ atomistic observation of carbon nanotubes during field emission. Kuzumaki, Toru; Horiike, Yasuhiro; Kizuka, Tokushi // AIP Conference Proceedings;2001, Vol. 590 Issue 1, p281 

    The structural variation in the tip of carbon-nanotube during field emission was in-situ observed at an atomic scale by high-resolution transmission electron microscopy equipped with newly designed two specimen holders system. The nanotubes which were sticking out of the rod specimen were fixed...

  • Saturation of emission current from carbon nanotube field emission array. Lim, Seong Chu; Jeong, Hee Jin; Shin, Young Min; Kim, Keun Soo; Kim, Won Seok; Park, Young Soo; Choi, Young Chul; An, Kay Hyeok; Bae, Dong Jae; Lee, Young Hee // AIP Conference Proceedings;2001, Vol. 590 Issue 1, p221 

    Field emission properties of carbon nanotube field emission arrays (CNT-FEA) that are exposed to various gases were studied. The existence of the hysteresis loop during the rise and fall bias sweep stems from gas adsorbates. We observed that gas adsorbates played an important role in the...

  • Role of extrinsic atoms on the morphology and field emission properties of carbon nanotubes. Chan, L. H.; Hong, K. H.; Xiao, D. Q.; Hsieh, W. J.; Lai, S. H.; Shih, H. C.; Lin, T. C.; Shieu, F. S.; Chen, K. J.; Cheng, H. C. // Applied Physics Letters;6/16/2003, Vol. 82 Issue 24, p4334 

    Extrinsic atoms were doped into multiwalled carbon nanotubes (MWCNTs) using microwave plasma-enhanced chemical vapor deposition. Doped nitrogen atoms alter the original parallel graphenes into highly curved ones including some fullerene-like structures. Doped nitrogen atoms could replace carbon...

  • Field emission from multiwall carbon nanotubes in gas for producing microplasma discharge. Zou, Q.; Wang, M. Z.; Yang, Y. L. // Journal of Applied Physics;Jul2009, Vol. 106 Issue 1, p13305 

    Electron field emission (FE) from multiwall carbon nanotubes (CNTs) in gas (Ar and air) for producing microplasma discharge was measured in a scanning electron microscope. The results showed that the FE properties of the CNTs were stable in Ar and air gases when the FE threshold voltages were...

  • Thermoelectric Properties of Nanotubular and Fractal Carbon Deposits. Zolotukhin, I. V.; Golev, I. M.; Popov, A. A.; Ievlev, V. P. // Technical Physics Letters;Aug2002, Vol. 28 Issue 8, p678 

    The structure and thermo emf of nanotubular and fractal carbon layers deposited from an electric discharge plasma were studied. The thermo emf of such nanotubular and fractal deposits is almost tenfold higher as compared to that of polycrystalline carbon, which is explained by the nanostructural...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics