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Aligned Ultralong ZnO Nanobelts and Their Enhanced Field Emission
Author(s) -
Wang W. Z.,
Zeng B. Q.,
Yang J.,
Poudel B.,
Huang J. Y.,
Naughton M. J.,
Ren Z. F.
Publication year - 2006
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200601274
Subject(s) - materials science , substrate (aquarium) , field electron emission , evaporation , current density , electric field , molten salt , nanotechnology , thermal , field (mathematics) , optoelectronics , metallurgy , oceanography , meteorology , thermodynamics , geology , physics , quantum mechanics , electron , mathematics , pure mathematics
Aligned ultralong ZnO nanobelts with an average length of 3.3 mm and widths up to 6 μm (see figure) are synthesized on a metal substrate through a one‐step process. The nanobelts obtained from this molten‐salt‐assisted thermal evaporation route show an emission current density of 1 mA cm –2 at an electric field of 2.9 V μm –1 , resulting from their high field‐enhancement factor (1.4 × 10 4 ).