Induced Growth of (0001)-Oriented Hydroxyapatite Nanorod Arrays on ZnO-Seeded Glass Substrate

Abstract

The oriented growth of the hydroxyapatite (HAp) nanorod array on the glass substrate with a ZnO seed layer was investigated. The samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and transmission electron microscopy. The HAp nanorods have a length of about 2 µm and a diameter of about 200 nm. The growth mechanism of the (0001)-oriented HAp nanorod array was attributed to the "mold effect" of the (0001)-oriented ZnO seed layer. The dissolution characteristics of the as-prepared HAp nanorod array have also been investigated.

Ammonium Hydroxide Mediated Hydrothermal Crystallization of Hydroxyapatite Coatings on Titanium Substrate

“…The possibility of obtaining HAp coatings on various metallic substrates using chelate decomposition synthesis route was first shown by Fujishiro et al [24,25]. Since then, various seeding layers on the titanium substrate have been used in order to induce controlled growth of HAp crystals [26][27][28]. In the present study, we obtained hydroxyapatite coatings composed of hexagonal rods with a c-axis orientation using the appropriate concentration of NH 4 OH directly on the titanium substrate.…”

“…The application of the appropriate seeding layer made it possible to obtain a dense coating at a higher pH. More recently, adequate HAp crystal morphology in the coatings synthesized hydrothermally was obtained also through a suitable seeding layer [26][27][28]. Lu et al showed that the use of the glass substrate with a ZnO seed layer leads to the oriented growth of the hydroxyapatite nanorod array [26].…”

“…More recently, adequate HAp crystal morphology in the coatings synthesized hydrothermally was obtained also through a suitable seeding layer [26][27][28]. Lu et al showed that the use of the glass substrate with a ZnO seed layer leads to the oriented growth of the hydroxyapatite nanorod array [26]. Chen et al fabricated HAp coatings with oriented nanorod arrays by using the bioglass as precursors [27].…”

Growth of one-dimensional single-crystalline hydroxyapatite nanorods

“…Jevtic et al synthesized HA nanorods by a homogeneous precipitation process in an ultrasonic field [22]. Lu et al grew HA nanorod array on the glass substrate with a ZnO seed layer [23]. Nasiri-Tabrizi et al synthesize nanosized HA via the mechanochemical method [24].…”

Growth of Intricate ZnO Nanorod Networks on α‐Fe2O3‐Coated Si Substrate: Growth Mechanism and Optical Properties

“…Based on this special structure, a unique group of novel nanostructures have been synthesized by Wang's group, such as asymmetric nanocantilever arrays, piezoelectric nanobelts, nanosprings, nanorings, and crossed ZnO/MgO nanorod networks . Recently, Xu et al . found that the growth of vertical hydroxyapatite nanorod arrays onto a ZnO seed layer was induced by polar surface.…”