Emission properties of carbon nanowalls on porous silicon

Evlashin, Stanislav A.; Mankelevich, Yuri A.; Borisov, Vladimir V.; Pilevskii, Andrey A.; Stepanov, Anton S.; Krivchenko, Victor A.; Suetin, Nikolai V.; Rakhimov, Alexander T.

doi:doi:10.1116/1.3681287

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Journal of Vacuum Science & Technology B / Volume 30 / Issue 2 / Nanometer Science & Technology

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J. Vac. Sci. Technol. B 30, 021801 (2012); http://dx.doi.org/10.1116/1.3681287 (6 pages)

Emission properties of carbon nanowalls on porous silicon

Stanislav A. Evlashin, Yuri A. Mankelevich, Vladimir V. Borisov, Andrey A. Pilevskii, Anton S. Stepanov, Victor A. Krivchenko, Nikolai V. Suetin, and Alexander T. Rakhimov

Skobel’tsyn Institute of Nuclear Physics, Moscow State University, Moscow 119991, Russia

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(Published online 1 February 2012)

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For the past two decades various methods of carbon nanostructures growth have been proposed. Special substrate pretreatment methods are generally used to grow carbon nanowalls on silicon substrates and among them are mechanical and catalytic methods and ion bombardment in an rf discharge with bias. This work describes the possibility of growing carbon structures on porous silicon in a dc discharge without any additional pretreatment of the substrate surface. Carbon structures were grown on n- and p-type (100) porous silicon substrates produced by using standard photoelectrochemical etching. The analysis of these carbon structures revealed nanocrystalline carbon with multilayer carbon nanotubes and fibers. All samples demonstrated low field emission thresholds (E_tr < 3 V/μm) and high current densities, showing an achieved current density of more than 6 A/cm² for an electric field of E ∼ 15 V/μm. The authors investigated various modifications of porous silicon samples and carbon structures and demonstrated a practicable technique to create a reproducible uniform spot that varies in size from several millimeters to tens of millimeters. The authors propose a simplified and less expensive alternative to existing methods.

ACKNOWLEDGMENTS

The work was fulfilled with the financial support of the Russian Ministry of Education and Science (Contracts Nos. 14.740.11.0832, 16.513.11.3122, and 02.740.11.0863), Leading Scientific School (Grant No. NS-3322.2010.2).

Article Outline

INTRODUCTION
EXPERIMENT
RESULTS AND DISCUSSION
SUMMARY AND CONCLUSIONS

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KEYWORDS and PACS

Keywords

carbon fibres, carbon nanotubes, current density, etching, field emission, multilayers, nanofabrication, nanofibres, photoelectrochemistry

PACS

81.07.De

Nanotubes
81.65.Cf

Surface cleaning, etching, patterning
82.50.-m

Photochemistry
61.48.De

Structure of carbon nanotubes, boron nanotubes, and other related systems
73.63.Fg

Nanotubes
79.70.+q

Field emission, ionization, evaporation, and desorption

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History

Received 30 September 2011
Accepted 18 December 2011
Published online 1 February 2012

Digital Object Identifier

http://dx.doi.org/10.1116/1.3681287

PUBLICATION DATA

ISSN

1071-1023 (print)

1520-8567 (online)

Publisher

American Vacuum Society

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