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Wetting behaviour of laser synthetic surface microtextures on Ti–6Al–4V for bioapplication by Narendra B. Dahotre, Sameer R. Paital, Anoop N. Samant, and.

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Presentation on theme: "Wetting behaviour of laser synthetic surface microtextures on Ti–6Al–4V for bioapplication by Narendra B. Dahotre, Sameer R. Paital, Anoop N. Samant, and."— Presentation transcript:

1 Wetting behaviour of laser synthetic surface microtextures on Ti–6Al–4V for bioapplication by Narendra B. Dahotre, Sameer R. Paital, Anoop N. Samant, and Claus Daniel Philosophical Transactions A Volume 368(1917):1863-1889 April 28, 2010 ©2010 by The Royal Society

2 Schematic of a laser interferometer set-up (Engleman et al. 2005). Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

3 Schematic of the pulsed Nd:YAG laser system used for the coating process (Paital et al. 2009). Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

4 Overlap of successive laser pulses over a single spot area. Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

5 Different steps involved in the evolution of the surface morphology at various times (t1<t2<t3) for a single laser beam. Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

6 Surface evolution for laser beam radii of (a) 450 μm, (b) 300 μm and (c) 150 μm. Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

7 Combination of profiles generated by successive pulses defining the width w and amplitude A. Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

8 Flow chart illustrating the method to predict surface morphology starting with laser processing parameters and material geometry and properties. Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

9 Groove pattern on Ti–6Al–4V by the laser interference technique (3.82 W laser power): (a) two- dimensional morphological evolution, (b) three-dimensional morphological evolution and (c) variation in height and width (across the line scan) of the features obt... Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

10 Pillar pattern on Ti–6Al–4V by the laser interference technique (3.82 W laser power): (a) two- dimensional morphological evolution, (b) three-dimensional morphological evolution and (c) variation in height and width at FWHM (across the line scan) of the feat... Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

11 Light optical images of the distilled water droplet shadow on (a) flat Ti–6Al–4V, (b) groove- patterned Ti–6Al–4V and (c) pillar-patterned Ti–6Al–4V and those of the SBF droplet shadow on (d) flat Ti–6Al–4V, (e) groove-patterned Ti–6Al–4V and (f) pillar-patt... Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

12 Schematic illustration of liquid invasion into (a) a groove pattern and (b) a pillar pattern. Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

13 (a) Variation in roughness factor Rf and (b) critical wetting angle θc with laser fluence for interference-patterned samples. Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

14 Low-magnification optical microscopic images of the surfaces of the coatings obtained at laser scan speed of: (a) 36 cm min−1, (b) 48 cm min−1, (c) 78 cm min−1 and (d) 102 cm min−1 (Paital & Dahotre 2009). Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

15 (a) Two-dimensional morphological evolution and (b) variation in height h and width w of the groove patterns (across the line scan). Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

16 The variation in roughness factor Rf and critical wetting angle θc with laser fluence of Ca–P- coated samples obtained by the laser direct writing technique. Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

17 SEM micrographs revealing the morphology of the MC3T3-E1 osteoblast cells following culture for 1 day on a laser direct writing synthesized Ca–P-coated sample obtained at a laser power of 156 W. Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society

18 Fluorescent micrographs for cytoskeleton assessment of adherent MC3T3-E1 osteoblast cells after culture for 1 day on a laser direct writing synthesized Ca–P-coated sample obtained at a laser power of 156 W. Narendra B. Dahotre et al. Phil. Trans. R. Soc. A 2010;368:1863-1889 ©2010 by The Royal Society


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