Field emission characteristics of carbon nanomaterials synthesized in methanol

Gamo, Hidenori; Kikuchi, Mayuko; Shibasaki, Takeshi; Ando, Toshihiro; Nishitani-Gamo, Mikka

doi:doi:10.1116/1.3292569

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Journal of Vacuum Science & Technology B / Volume 28 / Issue 2 / PAPERS FROM THE 22nd INTERNATIONAL VACUUM NANOELECTRONICS CONFERENCE / Materials

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J. Vac. Sci. Technol. B 28, C2B47 (2010); http://dx.doi.org/10.1116/1.3292569 (4 pages)

Field emission characteristics of carbon nanomaterials synthesized in methanol

Hidenori Gamo¹, Mayuko Kikuchi², Takeshi Shibasaki², Toshihiro Ando³, and Mikka Nishitani-Gamo⁴

¹Technical Research Institute, Toppan Printing Co., Ltd., 4-2-3 Takanodai-minami, Sugito, Saitama 345-8508, Japan
²Department of Applied Chemistry, Toyo University, 2100 Kujirai, Kawagoe, Saitama 350-8585, Japan
³National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
⁴Department of Applied Chemistry and Sensor Photonics Research Center, Toyo University, 2100 Kujirai, Kawagoe, Saitama 350-8585, Japan

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(Published online 31 March 2010)

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Field electron emission from various carbon nanomaterials catalytically synthesized in liquid methanol was measured to determine the relation between the emission properties and the morphology. The carbon nanomaterials with specific morphologies including fibriform, particlelike, and flakelike nanostructures were prepared at different temperatures ranging from 600 to 1000 °C. Field electron emission characteristics of the synthesized carbon nanomaterials were measured by using diode-type electrodes in a high-vacuum chamber. Low threshold electric fields in the range from 1.2 to 2.1 V μm⁻¹ were obtained from the carbon nanomaterials. Lower threshold electric fields of 1.2–1.4 V μm⁻¹ were observed in the fibriform nanostructured materials synthesized at 600 and 700 °C. Very stable emission currents were observed in the carbon nanomaterials with sp²-related high crystal quality grown at 900 °C. The authors found that the emission characteristics were strongly related to both the fine structure and crystallinity of the synthesized carbon nanomaterials.

ACKNOWLEDGMENTS

The authors would like to thank H. Tomokage and H. Sueyoshi of Fukuoka University for their valuable help with field emission measurements. This work was financially supported by a special research fund of Toyko University.

Article Outline

INTRODUCTION
EXPERIMENT
RESULTS AND DISCUSSION
CONCLUSIONS

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KEYWORDS and PACS

Keywords

carbon, electron field emission, nanofabrication, nanostructured materials

PACS

79.70.+q

Field emission, ionization, evaporation, and desorption
61.46.-w

Structure of nanoscale materials
81.16.-c

Methods of micro- and nanofabrication and processing

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History

Received 16 September 2009
Accepted 21 December 2009
Published online 31 March 2010

Digital Object Identifier

http://dx.doi.org/10.1116/1.3292569

PUBLICATION DATA

ISSN

1071-1023 (print)

1520-8567 (online)

Publisher

American Vacuum Society

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