Enhanced secondary electron emission from group III nitride/ZnO coaxial nanorod heterostructures

Shu Ping Lau, Lei Huang, Siu Fang Yu, Huiying Yang, Jin Kyoung Yoo, Sung Jin An, Gyu Chul Yi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

The process of enhancement of secondary electron emission (SEE) yields from ultrafine coaxial GaN/ZnO and nanoneedle heterostructures was analyzed. The surface morphology of ZnO nanoneedles, and of AlN/ZnO and GaN/ZnO coaxial heterostructures, was investigated by scanning electron microscopy. It was found that the SEE yields are significantly enhanced by the inherited nanostructure from the ZnO nanoneedle template. The enhancement of SEE in the coaxial heterostructures is due to the combined effect of the group III nitride layer and the nanostructured tomography. It was also found that AlN/ZnO and GaN/ZnO coaxial heterostructures have a higher SEE yield than thin films of AlN and GaN deposited on Si substrates.
Original languageEnglish
Pages (from-to)736-740
Number of pages5
JournalSmall
Volume2
Issue number6
DOIs
Publication statusPublished - 1 Jun 2006
Externally publishedYes

Keywords

  • Heterostructures
  • Nanorods
  • Nitrides
  • Secondary electron emission
  • Semiconductors

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Engineering (miscellaneous)

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