Open AccessField emission properties of well-ordered ZnO nanoneedle arrays
Author(s) -
Jiantao Xiao,
Bai Xin,
Gengmin Zhang
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.7057
Subject(s) - nanoneedle , materials science , field electron emission , substrate (aquarium) , optoelectronics , field (mathematics) , silicon , evaporation , nanotechnology , nanostructure , physics , mathematics , quantum mechanics , pure mathematics , electron , oceanography , geology , thermodynamics
Two kinds of vertically aligned, well-ordered zinc oxide nanoneedle arrays were synthesized on silicon substrates without any catalyst by a simple thermal evaporation method. The nanoneedle arrays have uniform distribution and unique orientation and height. The field emission study shows that both of them have not only low turn-on field and threshold field, but also the ability of stable and long time emission. The low turn-on field and threshold field result from the high aspect ratio and thin apex of the nanoneedles. The stable and long time emission are due to the uniform distribution and good contact between the nanoneedles and the substrate. The results show that regular nanoneedle arrays are ideal candidates for flat panel field emission applications.