Excimer laser processing as a tool for photocatalytic design of sol–gel TiO2 thin films

Starbova, K.; Yordanova, Velislava; Nihtianova, D.; Hintz, Werner; Tomas, Jürgen; Starbov, N.

doi:10.1016/j.apsusc.2007.12.036

Cited by 17 publications

(11 citation statements)

References 36 publications

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“…Ti peaks are shown due to the deposition (crystallisation) of titanium oxide. These results suggest that the metal surface was fused due to the thermal effect of the laser power; the titania sol appears to be crystallised and blended with hydroxyapatite to form apatie-TiO 2 spheres which are embedded into the metal surface matrix [6][7][8][9][10][11][12][13]17]. This indicates that the laser energy density plays the major role for the deposited coating thickness.…”

Section: Surface Morphologymentioning

confidence: 72%

“…The images display the variation in both morphology and composition of the surface; the EDS spectrum collected from the large particles reveal slightly higher phosphorus content than the surrounding. This is probably attributable to decomposition of some hydroxyapatite into calcium oxide under the thermal effects of the laser [6][7][8][9][10][11][12].…”

Section: Surface Morphologymentioning

confidence: 99%

“…However, samples soaked for 5 days did not show any new apatite formation (data not shown). This may be due to the fusion process, which might retard the Ca 2+ ion release [6,[13][14][15][16][17].…”

Section: Surface Morphologymentioning

confidence: 99%

“…Hence, crystallization of the amorphous CaP occurred by incorporation of OH -and CO 3 2-ions from the solution to from the apatite layer [5][6][13][14][15][16][17]. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Figure 6 shows XRD patterns collected from the film surfaces.…”

Section: Surface Morphologymentioning

confidence: 99%

“…Winfield et al [8] used excimer laser to crystallise zinc oxide thin films prepared by sol-gel technique. Starbova et al [9] investigated effects of excimer laser irradiation on the structure and performance of sol-gel titanium oxide films.…”

Section: Introductionmentioning

confidence: 99%

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Laser surface alloying of 316L stainless steel coated with a bioactive hydroxyapatite–titanium oxide composite

Ghaith

Hodgson

Sharp

2015

J Mater Sci: Mater Med

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Laser surface alloying of 316L stainless steel coated with a bioactive hydroxyapatite-titanium oxide composite. Abstract: Laser surface alloying (LSA) is a powerful technique for improving the mechanical and chemical properties of engineering components. In this study, Laser surface irradiation process employed in the surface modification off 316 L stainless steel substrate using hydroxyapatite-titanium oxide to provide a composite ceramic layer for the suitability of applying this technology to improve the biocompatibility of medical alloys and implants. Fusion of the metal surface incorporating hydroxyapatite-titania ceramic particles using a 30 W Nd:YAG laser at different laser powers, 40 %, 50% and 70 % power and a scan speed of 40 mms-1 was observed to adopt the optimum condition of ceramic deposition. Coatings were evaluated in terms of microstructure, surface morphology, composition biocompatibility using XRD, ATR-FTIR, SEM and EDS. Evaluation of the in vitro bioactivity by soaking the treated metal in SBF for 10 days showed the deposition of biomimetic apatite.Response to Reviewers: All fingers comments have been done. Thank you Powered by Editorial Manager® and ProduXion Manager® from Aries Systems CorporationLaser surface alloying of 316 L stainless steel coated with a bioactive hydroxyapatite-titanium oxide composite AbstractLaser surface alloying (LSA) is a powerful technique for improving the mechanical and chemicalproperties of engineering components. In this study, Laser surface irradiation process employed in the surface modification off 316 L stainless steel substrate using hydroxyapatite-titanium oxide to provide a composite ceramic layer for the suitability of applying this technology to improve the biocompatibility of medical alloys and implants. Fusion of the metal surface incorporating hydroxyapatite-titania ceramic particles using a 30 W Nd:YAG laser at different laser powers, 40 %, 50% and 70 % power and a scan speed of 40 mms -1 was observed to adopt the optimum condition of ceramic deposition. Coatings were evaluated in terms of microstructure, surface morphology, composition biocompatibility using XRD, ATR-FTIR, SEM and EDS. Evaluation of the in vitro bioactivity by soaking the treated metal in SBF for 10 days showed the deposition of biomimetic apatite.

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Section: Surface Morphologymentioning

confidence: 72%

Section: Surface Morphologymentioning

confidence: 99%

Section: Surface Morphologymentioning

confidence: 99%

Section: Surface Morphologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Laser surface alloying of 316L stainless steel coated with a bioactive hydroxyapatite–titanium oxide composite

Ghaith

Hodgson

Sharp

2015

J Mater Sci: Mater Med

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Photochemical formation of semiconducting nanostructures

et al. 2008

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Existing data on photochemical and photocatalytic approaches to the formation of semiconducting nanoparticles and also binary semiconducting nanostructures and nanocomposites of semiconductors with metals and polymers are reviewed. The nature of the effect of irradiation on the synthesis and properties of the obtained nanostructures and the possibility of photocatalytic control of the structural and spectral parameters of nanostructural semiconducting systems are examined.The accumulation of data on the properties of semiconducting (SC) nanomaterials, which has occurred particularly rapidly in the last 7-10 years, has opened up ever more alluring prospects for their application as light-sensitive and light-emitting components in nanophotonics [1-3], nanophotocatalysis [2,[4][5][6][7], biosensorics [8][9][10][11], and other important fields. The possibility of practical utilization is an important factor that has stimulated the search for and study of the processes involved in the formation of nanomaterials. On this account an enormous number of publications have now accumulated on the improvement of existing and development of new methods for the synthesis of semiconducting nanoparticles and nanostructures (e.g., see the reviews [6, 12-15]). A special position among them is occupied by methods based on photochemical transformations conducted either for the purpose of synthesis and directing it along a desired path or for improving the characteristics of nanostructures produced by other methods.Photochemical methods of synthesis have proved more effective than the production of nanomaterials by traditional synthetic approaches, and in a number of cases only they make it possible to achieve the assigned aim. For this reason the synthesis of semiconducting nanostructures and their modification under the conditions of photoirradiation are constantly attracting the attention of investigators, and the number of publications devoted to these questions is constantly increasing. We note, however, that they nevertheless remain disjointed.In view of the foregoing an attempt is made in the present article to organize existing data, to identify the most important directions for research and development, and thus to assess the current state of development of photochemical approaches to the formation of semiconducting nanostructures. Analysis of data on the photochemical formation and post-synthesis photochemical treatment of semiconducting nanostructures and multicomponent nanocomposites, including the nanoparticles of metals and polymers in addition to semiconductors, showed that in spite of the variety and diversity of the proposed approaches all the papers can be ascribed to only three courses: synthesis, synthesis control, and changing the characteristics of the semiconducting nanostructures. For this reason in this review photochemical approaches to the synthesis of nanoparticles of metal chalcogenides, binary semiconducting nanostructures, and nanocomposites consisting of semiconducting and conducting polymers are examin...

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Laser assisted modification and chemical metallization of electron-beam deposited ceria thin films

Krumov

Starbov

Starbova

et al. 2009

Applied Surface Science

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Excimer laser processing as a tool for photocatalytic design of sol–gel TiO2 thin films

Cited by 17 publications

References 36 publications

Laser surface alloying of 316L stainless steel coated with a bioactive hydroxyapatite–titanium oxide composite

Laser surface alloying of 316L stainless steel coated with a bioactive hydroxyapatite–titanium oxide composite

Photochemical formation of semiconducting nanostructures

Laser assisted modification and chemical metallization of electron-beam deposited ceria thin films

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