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A scheme for the soln. growth of a highly oriented microtubular array of ZnO onto substrates is presented. The structural surface metastability of the polar surface is used to design corresponding hollow structures. Well-aligned single cryst. hexagonal tube (1-2 μm in width, 10 μm in length) with well-defined crystallog. faces were grown along the [100] direction and oriented perpendicular on the substrate in very large uniform arrays. Application of these ZnO microtubes are discussed.
Giulia Tagliabue, Alfredo Angelo Luigi Naef, Ershad Mohammadi, Theodoros Tsoulos
Luc Thévenaz, Marcelo Alfonso Soto Hernandez