Journal
APPLIED SURFACE SCIENCE
Volume 507, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2019.145146
Keywords
TiO2 nanoarray; Field emitters; Sharp branches; Decorating Au nanoparticles; Synergetic enhancement
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Funding
- National Natural Science Foundation of China (NSFC) [51702174, 51702175, 51664005]
- Platform/Talent Project of Guizhou Province [[2017]5626, [2017]5788]
- Zhejiang Provincial Nature Science Foundation [LQ17E020002]
- Natural Science Foundation of Ningbo Municipal Government [2019A610049]
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As the heart of vacuum electronic device, the low turn-on field (E-to) of field emitters plays a crucial role for their practical application. In current work, we reported the designed fabrication of TiO2 field emitters with boosted field emission (FE) behaviors, by growing sharp branches and decorating Au nanoparticles (Au NPs) around the surfaces of preformed TiO2 nanorod arrays. It was found that the obtained nanoarrays with designed architectures could make a balance between the increased emission sites and limited field screening effect. The field enhancement factor (beta) of as-fabricated TiO2 emitters was similar to 2 times to that the bare emitters. Moreover, their turn-on field and current density could be of 1.61 V/mu m and similar to 4.95 mA/cm(2), respectively, both of which were state-of-the-art ones among the TiO2 field emitters ever reported.
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