Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 9, Issue 8, Pages 2093-2097Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2007.06.004
Keywords
anisotropic etching; microtip; field emission
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A highly ordered array of single-crystalline Zn microtips is obtained after anodizing of Zn foil in NH4Cl/H2O2 solution, and the formation mechanism and field emission property of such Zn microtips have been described. Sixfold single-crystalline Zn microtips are obtained by selective anisotropic etching of crystallographic planes with different dissolution rates. From the results of TEM analysis, the single-crystalline Zn microtips, formed on the Zn foil after anodic dissolution treatment, are enclosed by {1 (1) over bar 00} and are preferentially oriented along the c-axis. Besides, the improvement of turn-on field from 33.9 to 20.0 V/mu m is achieved with thin surface ZnO after annealing treatment. (C) Elsevier B.V. All rights reserved.
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