Abstract
For the first time, the mechanism of growth of plate-like n-HA electrodeposited on superhydrophilic vertically aligned multi-walled carbon nanotubes (VACNT) is presented and a model for the specific growth preference is discussed. Results show that the carboxyl (carboxylic acid)/carboxylate functional groups directly attached on VACNT tips after oxygen plasma treatment were essential for the acceleration of the OH− formation and the deposition of plate-like HA crystals. FEG-SEM, EDX and XRD showed that a homogeneous highly crystalline HA film, stoichiometric and with preferential growth in the (002) plane direction, was formed.
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Acknowledgments
This work was supported by FAPESP (07/00013-4, 06/03525-3). Special thanks to Maria Lucia Brison (LAS/INPE) for the SEM images, Diego Davi Coimbrão (UFSCar) for the high-resolution SEM and Marcelo E. H. Maia da Costa (PUC/Rio) for the XPS spectra. We would also like to thank the referees for the comments and recommendations on how to improve our work. We also very grateful for the special attention given by Professor Karl J. Jalkanen to improved the quality of this manuscript.
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Dedicated to Professor Akira Imamura on the occasion of his 77th birthday and published as part of the Imamura Festschrift Issue.
An erratum to this article can be found at http://dx.doi.org/10.1007/s00214-011-1065-y
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Lobo, A.O., Marciano, F.R., Regiani, I. et al. Proposed model for growth preference of plate-like nanohydroxyapatite crystals on superhydrophilic vertically aligned carbon nanotubes by electrodeposition. Theor Chem Acc 130, 1071–1082 (2011). https://doi.org/10.1007/s00214-011-0993-x
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DOI: https://doi.org/10.1007/s00214-011-0993-x