Hydroxyapatite thin films

Hontsu, S., T. Matsumoto, J. Ishii, M. Nakamori, H. Tabata, and T. Kawai, Electrical properties of hydroxyapatite thin films grown by pulsed laser deposition. Thin Sol. Films, 295, 214-217 (1997). 

Dinda, G.P., Shin, J., and Mazumder, J. (2009) Pulsed laser deposition of hydroxyapatite thin films on Ti-6A1-4V effect of heat treatment on structure and properties. 

Kim, H.W., Kim, H.E., Salih, V., and Knowles, J.C. (2005) Sol-gel-modified titanium with hydroxyapatite thin films and effect on osteoblast-like cell responses. / Biomed. Mater. Res. A, 74A (3), 294-305. 

L. T., Rossi, A.L., Ospina, R.O., Borghi, F.F., Silva Filho, J.G., and Rossi, A.M. (2013) Growth of crystalline hydroxyapatite thin films at room temperature by tuning the energy of the rf-magnetron sputtering plasma. ACS Appl. Mater. Interfaces, 5 (19), 9435-9445. 

Mroz, W., Budner, B., Syroka, R., Niedzielski, I<., Golanski, G., Slosarczyk, A., Schwarze, D., and Douglas, T.E.L. (2014) In vivo implantation of porous titanium alloy implants coated with magnesium-doped octacalcium phosphate and hydroxyapatite thin films using pulsed laser deposition. /. Biomed. Mater. Res. Part B. doi 10.1002/jbm.b 33170... 

Mroz W, et al. In vivo implantation of porous titanium alloy implants coated with magnesium-doped octacalcium phosphate and hydroxyapatite thin films using pulsed laser depostion. J Biomed Mater Res B Appl Biomater 2015 103(1) 151—8. 

Cotell C.M., Chrisey D.B., Grabowski K.S., Sprague J.A., and Gossett C.R. 1992. Pulsed laser deposition of hydroxyapatite thin films on T1-6A1-4V, /. Appl. Biomater. 3 87-93. 

Another approach for bioactive medical implants that has been pursued for several years is the use of hydroxyapatite thin-film coatings on load-bearing bodies [165]. For load-bearing applications, metallic alloys are commonly used, and thermal... 

Two capabilities of ISS are important in applications to the analysis of ceramics. One of these is its surface sensitivity. Many catalyst systems use ceramics where the surface chemistry of the outer 50 A or less is extremely important to performance. Comparing the ratio of H and O to AI or Si is equally important for many systems involving bonding operations, such as ceramic detectors, thin films, and hydroxyapatite for medical purposes. 

Colovic, B., Jokanovic, V., Jokanovic, B., and Jovic, N. (2014) Biomimetic deposition of hydroxyapatite on the surface of silica thin film-covered steel tape. Ceram. Int, 40 (5),... 

Some examples of biologically relevant thin films are layers made by adsorbed proteins that are the precursors for cell attachment, bacterial films or biofilms, and coatings of minerals such as hydroxyapatite to enhance integration of the implants to bones. This section describes the evaluation of some of the biological attributes of such surface coatings. 

Biomimicking composite with hydroxyapatite. Also, nanofibiDus mats that enhanced cell adhesion over that of the thin film, reported. 

Lopatin, C., Pizziconi, V., Alford, T. and Laursen, T. (1998) Hydroxyapatite powders and thin films prepared by a sol-gel technique. Thin Solid Films, 326, 227-32. 

In the presence of fluoride, calcium ions have been found to be more firmly anchored than in pure hydroxyapatite [67]. This enhances the overall resistance to dissolution. Thus, the presence of a thin stable film of fluorapatite on the surface of hydroxyapatite crystals has two effects, namely (i) resistance to diffusion and dissolution of the anion and (ii) firmer binding of calcium ions into the surface. Both of these make the resulting apatite structure more resistant to dissolution, regardless of the pH of the external medium, and they thereby increase the resistance of the mineral phase to the onset of caries. 

Some work has been reported on deposition of hydroxyapatite under hydrothermal conditions, that is much above 100 °C. This includes a study by Liu, Savino and Yates (2011) who coated hydroxyapatite on titanium, stainless steel, aluminium and copper substrates by a seeded hydrothermal deposition method. The deposition strategy included an electrochemical reaction to form quickly a thin layer of HAp seed crystals. Subsequent hydrothermal crystal growth from the seed layer resulted in dense and durable HAp films. In a typical hydrothermal synthesis, a solution of Na2EDTA (0.20 M) and Ca(NOs)2 (0.20 M) was prepared in 15 ml water and a solution of (NH4)2HP04 (0.12 M) in 15 ml water was prepared in a second container. The two source solutions were mixed together after the pH of each solution was raised to 10.0 with ammonium hydroxide. The resulting combined solution was stirred at room temperature for about 20 min and then transferred to a Teflon-lined stainless steel pressure vessel of 40 ml internal volume. 

K. (2009) Adhesion study of pulsed laser deposited hydroxyapatite coating on laser surface nitrided titanium. Thin Solid Films, 517, 5496-5501. 

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