Abstract
A range of potentially bioactive ceramic coatings, based on combinations of either hydroxyapatite (HA) or titanium oxide nanoparticles with carbon nanotubes (CNTs), have been deposited on metallic substrates, using electrophoretic deposition (EPD). Sol–gel derived, ultrafine HA powders (10–70 nm) were dispersed in multi-wall nanotube-containing ethanol suspensions maintained at pH = ∼3.5 and successfully coated onto Ti alloy wires at 20 V for 1–3 min For TiO2/CNT coatings, commercially available titania nanopowders and surface-treated CNTs in aqueous suspensions were co-deposited on stainless steel planar substrates. A field strength of 20 V/cm and deposition time of 4 min were used working at pH = 5. Although the co-deposition mechanism was not investigated in detail, the evidence suggests that co-deposition occurs due to the opposite signs of the surface charges (zeta potentials) of the particles, at the working pH. Electrostatic attraction between CNTs and TiO2 particles leads to the creation of composite particles in suspension, consisting of TiO2 particles homogenously attached onto the surface of individual CNTs. Under the applied electric field, these net negatively charged “composite TiO2/CNT” elements migrate to and deposit on the anode (working electrode). The process of EPD at constant voltage conditions was optimised in both systems to achieve homogeneous and reasonably adhered deposits of varying thicknesses on the metallic substrates.
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References
Wei M (1999) J Biomed Mater Res 45:11
Heidenau F, Mittelmeier W, Detsch R, Haenle M, Stenzel F, Ziegler G, Gollwitzer H (2005) J Mater Sci Mater Med 16:883
Ramires PA, Romito A, Cosentino F, Milella E (2001) Biomaterials 22:1467
Gutwein LG, Webster TK (2002) J Nanoparticulate Res 4:231
Kaya C, Kaya F, Su B, Thomas BJC, Boccaccini AR (2005) Surf Coat Tech 2–3:303
Tabellion J, Clasen R (2004) J Mater Sci 39:803
Boccaccini AR, Roether JA, Thomas BJC, Shaffer MSP, Chavez E, Stoll E, Minay EJ (2006) J Ceram Soc Japan 114:1
Van Der Biest O, Vandeperre L (1999) Ann Rev Mater Sci 29:327
Boccaccini AR, Zhitomirsky I (2002) Curr Opin Solid State Mater Sci 6:251
Zhitomirsky I, Gal-Or L (1997) J Mater Sci: Mater Med 8:213
Wei M, Ruys AJ, Milthorpe BK, Sorrell CC (2005) J Mater Sci Mater Med 16:319
Chen F, Lin LW, Lin CJ, Lu WW (2005) Key Eng Mater 288–289:183
Krause D, Thomas BC, Leinenbach C, Eifler D, Minay EJ, Boccaccini AR (2006) Surf Coat Tech 200:4835
Du CS, Heldebrant D, Pan N (2002) J Mater Sci Lett 21:565
Thomas BJC, Boccaccini AR, Shaffer MSP (2005) J Amer Cer Soc 88:980
Thomas BJC, Shaffer MSP, Freeman S, Koopman M, Chawla KK, Boccaccini AR (2006) Key Eng Mater 314:141
Gao B, Yue GZ, Qiu Q, Cheng Y, Shimoda H, Fleming L, Zhou O (2001) Adv Mater 13:1770
Sinha N, Yeow JTW (2005) IEEE Trans Nanobiosci 4:180
Correa-Duarte MA, Wagner N, Rojas-Chapana J, Morsczeck C, Thie M, Giersig M (2004) Nano Lett 4:2233
Zao L, Gao L (2004) Carbon 42:423
Rao CNR, Govindaraj A (1998) Mater Res Innov 2:128
Singh C, Shaffer MSP, Windle AH (2003) Carbon 41:359
Wang N, Lin H, Li J, Yang X, Chi B (2006) Thin Solid Films 496:649
Esumi K, Ishigami M, Nakajima A, Sawada K, Honda H (1996) Carbon 34:279
Shaffer MSP, Fan X, Windle AH (1998) Carbon 36:1603
Ma J, Chen J (2002) J Am Ceram Soc 85:1735
Lee S, Sigmund S (2003) Chem Commun 4:780
Acknowledgments
EPSRC is acknowledged for financial support. Experimental assistance of Mr Feras Yosef is appreciated.
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Singh, I., Kaya, C., Shaffer, M.S.P. et al. Bioactive ceramic coatings containing carbon nanotubes on metallic substrates by electrophoretic deposition. J Mater Sci 41, 8144–8151 (2006). https://doi.org/10.1007/s10853-006-0170-0
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DOI: https://doi.org/10.1007/s10853-006-0170-0