Field Emitters Using Inverse Opal Structures

William M. Jones, Runyu Zhang, Eshwari Murty, Xiuting Zhu, Yifan Yao, Harish Manohara, Paul V Braun, Lauren C. Montemayor

Research output: Contribution to journalArticle

Abstract

Electronics to be used in space must often perform in high temperature or radiation hard environments that render conventional solid-state technologies unable to meet mission requirements. As a result, microscale and nanoscale field emission devices are being explored as fundamental components of electronics capable of operating in these harsh environments. Wide scale implementation of these devices is hindered by the difficulty of fabricating large, mechanically stable, uniform arrays of sharp emitting tips. This work presents a scalable method to produce uniform arrays of field emitting tips. Polystyrene spheres are applied as a template for electrochemical deposition. An electrochemical etching process is developed to sharpen tips to a radius of curvature of 5–10 nm, optimizing them for field emission applications. The flexibility of the fabrication process allows for device optimization in terms of tip geometry, density, and constituent material to achieve high field enhancement factors, exceeding 100. Miniaturized field emitting diode and gated triode devices are fabricated. Finally, the electrochemically deposited material is used as a scaffold for the deposition of a refractory, low work function emitting layer, and the hybrid cathode is characterized as a field emitter at temperatures up to 300 ºC.

Original languageEnglish (US)
Article number1808571
JournalAdvanced Functional Materials
Volume29
Issue number16
DOIs
StatePublished - Apr 18 2019

Fingerprint

Field emission
emitters
Electronic equipment
Electrochemical etching
Triodes
Polystyrenes
Scaffolds
Refractory materials
field emission
Diodes
Cathodes
Radiation
Fabrication
Temperature
triodes
Geometry
refractories
electronics
microbalances
polystyrene

Keywords

  • diode
  • field emission
  • inverse opal
  • self-assembly
  • triode

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry

Cite this

Jones, W. M., Zhang, R., Murty, E., Zhu, X., Yao, Y., Manohara, H., ... Montemayor, L. C. (2019). Field Emitters Using Inverse Opal Structures. Advanced Functional Materials, 29(16), [1808571]. https://doi.org/10.1002/adfm.201808571

Field Emitters Using Inverse Opal Structures. / Jones, William M.; Zhang, Runyu; Murty, Eshwari; Zhu, Xiuting; Yao, Yifan; Manohara, Harish; Braun, Paul V; Montemayor, Lauren C.

In: Advanced Functional Materials, Vol. 29, No. 16, 1808571, 18.04.2019.

Research output: Contribution to journalArticle

Jones, WM, Zhang, R, Murty, E, Zhu, X, Yao, Y, Manohara, H, Braun, PV & Montemayor, LC 2019, 'Field Emitters Using Inverse Opal Structures', Advanced Functional Materials, vol. 29, no. 16, 1808571. https://doi.org/10.1002/adfm.201808571
Jones WM, Zhang R, Murty E, Zhu X, Yao Y, Manohara H et al. Field Emitters Using Inverse Opal Structures. Advanced Functional Materials. 2019 Apr 18;29(16). 1808571. https://doi.org/10.1002/adfm.201808571
Jones, William M. ; Zhang, Runyu ; Murty, Eshwari ; Zhu, Xiuting ; Yao, Yifan ; Manohara, Harish ; Braun, Paul V ; Montemayor, Lauren C. / Field Emitters Using Inverse Opal Structures. In: Advanced Functional Materials. 2019 ; Vol. 29, No. 16.
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