Position-selective growth of ZnO nanowires by ultrasonic spray pyrolysis

• Published in: Journal of crystal growth Vol. 311; no. 20; pp. 4499 - 4504
• Main Authors: Than Htay, Myo, Hashimoto, Yoshio, Momose, Noritaka, Ito, Kentaro
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2009; Elsevier
• Subjects: A1. Growth mechanism; A1. Nanowire; A1. ZnO; A3. Position-selectivity; A3. Ultrasonic spray pyrolysis; Chemical synthesis methods; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Methods of crystal growth; physics of crystal growth; Methods of nanofabrication; Nanoscale materials and structures: fabrication and characterization; Physics; Quantum wires; Theory and models of crystal growth; physics of crystal growth, crystal morphology and orientation; A1. ZnO; A3. Ultrasonic spray pyrolysis; 81.16.−c; 81.05.Dz; 81.07.−b; A3. Position-selectivity; A1. Nanowire; 81.20.Rg; 81.20.−n; A1. Growth mechanism; Pyrolysis; Nucleation; Calcium oxide; Nitrates; Selectivity; Precursor; Nitric acid; Soda-lime glasses; Selective growth; 81.20.-n; Growth mechanism; 81.07.-b; 81.16.-c; Zinc oxide; Nanowires; Nanostructured materials; Nanomaterial synthesis
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2009.08.008

Position-selective growth of ZnO nanowires was realized by utilizing a patterned soda-lime glass layer. The soda-lime glass layer contributes as the origin of nucleation sites for the growth of nanowires in economically viable ultrasonic spray pyrolysis technique. The formation of nanowires took place with good reproducibility at relatively low substrate temperatures of 250– 400 ∘ C when the soda-lime glass matrix was present at the surface of substrates, and such a nitrate compound as nitric acid or nitrate salt was mixed in the precursor solutions. Based on this technique, the position-selective growth and density-controlled growth of ZnO nanowires can be performed on various types of substrate. The presence of a CaO compound in the glass matrix was revealed as an important condition to grow the nanowires.