Design and Fabrication of CNT-Based E-Gun Using Stripe-Patterned Alloy Substrate for X-Ray Applications

Jongmin Lim; Amar P. Gupta; Seung Jun Yeo; Moonkyoo Kong; Chong Gil Cho; Seung Hoon Kim; Jeung Sun Ahn; Mallory Mativenga; Jehwang Ryu

doi:10.1109/TED.2019.2943870

Design and Fabrication of CNT-Based E-Gun Using Stripe-Patterned Alloy Substrate for X-Ray Applications

Jongmin Lim, Amar P. Gupta, Seung Jun Yeo, Moonkyoo Kong, Chong Gil Cho, Seung Hoon Kim, Jeung Sun Ahn, Mallory Mativenga, Jehwang Ryu

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

We report the enhancement of carbon nanotube (CNT) field emitters by growing them directly on stripe-patterned alloy substrates. For a gate voltage of 1300 V, CNT field emitters grown on full and stripe-patterned alloy substrates achieved respective emission currents of 0.22 and 2.32 mA, corresponding to tenfold performance enhancement. Performance enhancement is attributed to the reduced screening effect (as a result of the spacing between strips) during field emission and a damage-free patterning process. To verify the ability of the stripe-patterned CNT field emitters to generate X-rays, we designed and assembled an electron gun through brazing. With the open type X-ray system, an X-ray image of human teeth was successfully obtained, verifying the potential of the stipe-patterned CNT emitters in X-ray applications.

Original language	English
Article number	8874963
Pages (from-to)	5301-5304
Number of pages	4
Journal	IEEE Transactions on Electron Devices
Volume	66
Issue number	12
DOIs	https://doi.org/10.1109/TED.2019.2943870
Publication status	Published - Dec 2019

Bibliographical note

Publisher Copyright:
© 1963-2012 IEEE.

Keywords

Carbon nanotube (CNT)
X-ray
field emission

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10.1109/TED.2019.2943870

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title = "Design and Fabrication of CNT-Based E-Gun Using Stripe-Patterned Alloy Substrate for X-Ray Applications",

abstract = "We report the enhancement of carbon nanotube (CNT) field emitters by growing them directly on stripe-patterned alloy substrates. For a gate voltage of 1300 V, CNT field emitters grown on full and stripe-patterned alloy substrates achieved respective emission currents of 0.22 and 2.32 mA, corresponding to tenfold performance enhancement. Performance enhancement is attributed to the reduced screening effect (as a result of the spacing between strips) during field emission and a damage-free patterning process. To verify the ability of the stripe-patterned CNT field emitters to generate X-rays, we designed and assembled an electron gun through brazing. With the open type X-ray system, an X-ray image of human teeth was successfully obtained, verifying the potential of the stipe-patterned CNT emitters in X-ray applications.",

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author = "Jongmin Lim and Gupta, {Amar P.} and Yeo, {Seung Jun} and Moonkyoo Kong and Cho, {Chong Gil} and Kim, {Seung Hoon} and Ahn, {Jeung Sun} and Mallory Mativenga and Jehwang Ryu",

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doi = "10.1109/TED.2019.2943870",

language = "English",

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AU - Lim, Jongmin

AU - Gupta, Amar P.

AU - Yeo, Seung Jun

AU - Kong, Moonkyoo

AU - Cho, Chong Gil

AU - Kim, Seung Hoon

AU - Ahn, Jeung Sun

AU - Mativenga, Mallory

AU - Ryu, Jehwang

PY - 2019/12

Y1 - 2019/12

N2 - We report the enhancement of carbon nanotube (CNT) field emitters by growing them directly on stripe-patterned alloy substrates. For a gate voltage of 1300 V, CNT field emitters grown on full and stripe-patterned alloy substrates achieved respective emission currents of 0.22 and 2.32 mA, corresponding to tenfold performance enhancement. Performance enhancement is attributed to the reduced screening effect (as a result of the spacing between strips) during field emission and a damage-free patterning process. To verify the ability of the stripe-patterned CNT field emitters to generate X-rays, we designed and assembled an electron gun through brazing. With the open type X-ray system, an X-ray image of human teeth was successfully obtained, verifying the potential of the stipe-patterned CNT emitters in X-ray applications.

AB - We report the enhancement of carbon nanotube (CNT) field emitters by growing them directly on stripe-patterned alloy substrates. For a gate voltage of 1300 V, CNT field emitters grown on full and stripe-patterned alloy substrates achieved respective emission currents of 0.22 and 2.32 mA, corresponding to tenfold performance enhancement. Performance enhancement is attributed to the reduced screening effect (as a result of the spacing between strips) during field emission and a damage-free patterning process. To verify the ability of the stripe-patterned CNT field emitters to generate X-rays, we designed and assembled an electron gun through brazing. With the open type X-ray system, an X-ray image of human teeth was successfully obtained, verifying the potential of the stipe-patterned CNT emitters in X-ray applications.

KW - Carbon nanotube (CNT)

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ER -

Design and Fabrication of CNT-Based E-Gun Using Stripe-Patterned Alloy Substrate for X-Ray Applications

Abstract

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Keywords

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