Wetting behaviour of laser synthetic surface microtextures on Ti–6Al–4V for bioapplication by...

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 AVolume 368(1917):1863-1889

April 28, 2010

©2010 by The Royal Society

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

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

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

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

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

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

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

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

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

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

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

(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

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

(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

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

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

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