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Field emission tip effect and field emission performance of micro‐tip arrays fabricated on single‐crystal LaB6.

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Title: Field emission tip effect and field emission performance of micro‐tip arrays fabricated on single‐crystal LaB6.
Authors: Yan, Long1 (AUTHOR), Zhang, Xin1 (AUTHOR) zhxin@bjut.edu.cn, Zhou, Shenlin2 (AUTHOR), Rong, Qinglin1 (AUTHOR), Liu, Nan1 (AUTHOR), Zhang, Wei3 (AUTHOR), Li, Jichao4 (AUTHOR), Lu, Qingmei1 (AUTHOR) qmlu@bjut.edu.cn
Source: Journal of the American Ceramic Society. Jul2025, Vol. 108 Issue 7, p1-8. 8p.
Subjects: Electric fields, Inductive effect, Electronic ceramics, Femtosecond lasers, Commercial space ventures, Field emission
Abstract: A finite element simulation study is conducted using COMSOL Multiphysics software for tip effects such as induced potential, induced electric field intensity, and charge density of micro‐tips in a micro‐tips array under applied voltage. The simulation results indicate that under a constant micro‐tip spacing x, the field shielding effect increases as the micro‐tip curvature radius decreases. Moreover, when the tip spacing x is greater than twice the tip height h, the field shielding effect can be neglected. Based on the COMSOL simulation results of the micro‐tips array, the femtosecond laser processing technology was employed to achieve controllable fabrication of micro‐tips array microstructures on the (100) crystal plane of single‐crystal LaB6. Under the condition of good geometric morphology of the tips, tips with a height of 10 µm and a minimum tip curvature radius of 0.2 µm could be processed, with good uniformity in array morphology and distribution. Field emission performance tests show that under testing conditions with a vacuum level of 1 × 10−5 Pa and an applied electric field Ea of 5.6 V/µm, it exhibits a low turn‐on electric field Et (2.7 V/µm), a field emission current density of 4.36 A/cm2, and good emission stability. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the American Ceramic Society is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
  Group: Ti
  Data: Field emission tip effect and field emission performance of micro‐tip arrays fabricated on single‐crystal LaB<subscript>6</subscript>.
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  Data: <searchLink fieldCode="AR" term="%22Yan%2C+Long%22">Yan, Long</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Xin%22">Zhang, Xin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> zhxin@bjut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhou%2C+Shenlin%22">Zhou, Shenlin</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rong%2C+Qinglin%22">Rong, Qinglin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Nan%22">Liu, Nan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Wei%22">Zhang, Wei</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Jichao%22">Li, Jichao</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lu%2C+Qingmei%22">Lu, Qingmei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> qmlu@bjut.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+American+Ceramic+Society%22">Journal of the American Ceramic Society</searchLink>. Jul2025, Vol. 108 Issue 7, p1-8. 8p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Electric+fields%22">Electric fields</searchLink><br /><searchLink fieldCode="DE" term="%22Inductive+effect%22">Inductive effect</searchLink><br /><searchLink fieldCode="DE" term="%22Electronic+ceramics%22">Electronic ceramics</searchLink><br /><searchLink fieldCode="DE" term="%22Femtosecond+lasers%22">Femtosecond lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Commercial+space+ventures%22">Commercial space ventures</searchLink><br /><searchLink fieldCode="DE" term="%22Field+emission%22">Field emission</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: A finite element simulation study is conducted using COMSOL Multiphysics software for tip effects such as induced potential, induced electric field intensity, and charge density of micro‐tips in a micro‐tips array under applied voltage. The simulation results indicate that under a constant micro‐tip spacing x, the field shielding effect increases as the micro‐tip curvature radius decreases. Moreover, when the tip spacing x is greater than twice the tip height h, the field shielding effect can be neglected. Based on the COMSOL simulation results of the micro‐tips array, the femtosecond laser processing technology was employed to achieve controllable fabrication of micro‐tips array microstructures on the (100) crystal plane of single‐crystal LaB6. Under the condition of good geometric morphology of the tips, tips with a height of 10 µm and a minimum tip curvature radius of 0.2 µm could be processed, with good uniformity in array morphology and distribution. Field emission performance tests show that under testing conditions with a vacuum level of 1 × 10−5 Pa and an applied electric field Ea of 5.6 V/µm, it exhibits a low turn‐on electric field Et (2.7 V/µm), a field emission current density of 4.36 A/cm2, and good emission stability. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of the American Ceramic Society is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1111/jace.20496
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
        StartPage: 1
    Subjects:
      – SubjectFull: Electric fields
        Type: general
      – SubjectFull: Inductive effect
        Type: general
      – SubjectFull: Electronic ceramics
        Type: general
      – SubjectFull: Femtosecond lasers
        Type: general
      – SubjectFull: Commercial space ventures
        Type: general
      – SubjectFull: Field emission
        Type: general
    Titles:
      – TitleFull: Field emission tip effect and field emission performance of micro‐tip arrays fabricated on single‐crystal LaB6.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Yan, Long
      – PersonEntity:
          Name:
            NameFull: Zhang, Xin
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            NameFull: Zhou, Shenlin
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            NameFull: Rong, Qinglin
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            NameFull: Liu, Nan
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            NameFull: Zhang, Wei
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            NameFull: Li, Jichao
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            NameFull: Lu, Qingmei
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          Dates:
            – D: 01
              M: 07
              Text: Jul2025
              Type: published
              Y: 2025
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              Value: 00027820
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              Value: 108
            – Type: issue
              Value: 7
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            – TitleFull: Journal of the American Ceramic Society
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