Excimer laser induced patterning of polymeric surfaces

Callewaert, Kristof; Martelé, Yves; Breban, L.; Naessens, Kris; Vandaele, P.; Baets, Roel; Geuskens, Georges; Schacht, Etienne

doi:10.1016/s0169-4332(02)01376-4

Cited by 29 publications

(17 citation statements)

References 10 publications

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“…Among laser micromachining processes, ultraviolet (UV) laser ablation is a powerful and flexible technique which can be used for rapid patterning of small scale geometrical features that can be used on a number of different materials, such as polymers, ceramics, and metals (Callewaert 2003). Excimer lasers are generally short pulsed lasers that use a mixture of gases to generate output radiation and emission at a particular wavelength in the UV region of the spectrum (Tseng 2004).…”

Section: Lasers In Micromachiningmentioning

confidence: 99%

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Micromachining of polyurethane (PU) polymer using a KrF excimer laser (248nm)

Singh

Sharma

2014

Applied Surface Science

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SUMMARYPolyurethane (PU) polymer, a thermoplastic material, melts when exposed to laser light due to a variety of primary and secondary structures. Pattern and/or inducing a significant chemical change of the surface of polyurethane impacts a number of technologies, such as tissue engineering, MEMS devices, semiconductor manufacturing.At present, polyurethane (PU) is considered to be a best compromise material available, in terms of biocompatibility, mechanical flexibility and strength. Excimer laser micromachining is an appropriate tool for an alternative approach to conventional machining. It is highly desirable to relate the material removal rate with etch rate and ablation depth for understanding the ablation dynamics. In this investigation, micromachining of polyurethane polymer is conducted using a short pulse (FWHM = 25 ns) KrF Excimer Laser (248 nm wavelength) that generates laser energy in the range of 100 to 650 mJ. The machined surfaces were examined using conventional optical microscopy, surface profilometer and laser interference optical microscope (MicroXAM).The influence of the operating parameters, such as input energy, number of pulses, and environment on resulting micromachined geometries is also studied. Simple as well as complex geometries, such as micro-fluidic channels, micro-gears, part geometries used in medical applications, and electrical circuits were micromachined.iii ACKNOWLEDGMENTS

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Section: Lasers In Micromachiningmentioning

confidence: 99%

“…It has been observed that the interaction of pulsed high repetition excimer laser with polymer surface leads to ablative photo-decomposition which results basically due to etching of polymer surface and explosive ejection of decomposition products at supersonic velocities (Callewaert 2003). Ricciardi et.…”

Section: Excimer Laser 2d/3d Patterningmentioning

confidence: 99%

Micromachining of polyurethane (PU) polymer using a KrF excimer laser (248nm)

Singh

Sharma

2014

Applied Surface Science

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“…These techniques range from surface topography modification [6][7][8] to surface chemistry modification [9][10][11] and have given rise to the increased interest in using polymers as biomaterials [12][13][14][15][16][17][18][19]. Nylon 6,6, the strongest and most abrasive resistant unreinforced nylon, has been used for such biological applications as sutures, tracheal tubes and gastrointestinal segments [20].…”

Section: -Introductionmentioning

confidence: 99%

Wettability and osteoblast cell response modulation through UV laser processing of nylon 6,6

Waugh

Lawrence

2011

Applied Surface Science

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1522 668891 -AbstractWith an ageing population the demand for cheap, efficient implants is ever increasing. Laser surface treatment offers a unique means of varying biomimetic properties to determine generic parameters to predict cell responses. This paper details how a KrF excimer laser can be employed for both laser-induced patterning and whole area irradiative processing to modulate the wettability characteristics and osteoblast cell response following 24 hour and 4 day incubation. Through white light interferometry (WLI) it was found that the surface roughness had considerably increased by up to 1.5 µm for the laser-induced patterned samples and remained somewhat constant at around 0.1 µm for the whole area irradiative processed samples. A sessile drop device determined that the wettability characteristics differed between the surface treatments. For the patterned samples the contact angle, θ, increased by up to 25° which can be attributed to a mixed-state wetting regime.For the whole area irradiative processed samples θ decreased owed to an increase in polar component, γ P . For all samples θ was a decreasing function of the surface energy. The laser whole area irradiative processed samples gave rise to a distinct correlative trend between the cell response, θ and γ P . However, no strong relationship was determined for the laser-induced patterned samples due to the mixed-state wetting regime. As a result, owed to the relationships and evidence of cell differentiation one can deduce that laser whole area irradiative processing is an attractive technology for employment within regenerative medicine to meet the demands of an ageing population.Keywords: Excimer laser, nylon 6,6, wettability, osteoblast cells, bioactivity, regenerative medicine. -IntroductionIt has been realized worldwide within the scientific community and various industries that lasers offer major advantages over alternative techniques for materials processing [1][2][3][4]. Some of the main advantages of using a laser for materials processing are:• Relative cleanliness.• Accurate processing.o Allows much control over the Heat Affected Zone (HAZ) due to the ability of relative precise control over the thermal profile and thermal penetration/absorption.• Precise placement of the beam onto the target material allowing user specified areas of the target material to be processed.• Post-processing techniques required are usually minimal.• Non-contact processing.• Automation (repeatability) of the various processing techniques using a laser is relatively easy to implement.With a large number of different lasers now commercially available it is possible for one to deduce that almost all materials can be processed using a laser due to the wide range of laser parameters that can be utilized. With the many benefits of using lasers for materials processing it has been found that the interest in laser-induced surface treatment has grown, especially within the biomedical industry. This is due to the fact that lasers offer the user a highly selective, rapid...

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“…The UV laser beam-material interaction gives rise to ablative photo-decomposition and subsequently gives rise to etching of the material surface. Research such as that conducted by Callewaert et al [51] showed that UV laser direct writing of the material eradicates the requirement for photo-masks, making the process easier and keeping the running costs low. Leading on from this, Pfleging and Bruns [52] and Duncan et al [53] showed that two and 3-D topographies can be efficiently achieved using excimer lasers.…”

Section: Various Surface Treatments 21 Laser Surface Treatmentmentioning

confidence: 99%

Surface Treatments to Modulate Bioadhesion: A Critical Review

Waugh¹,

Toccaceli²,

Gillett³

et al. 2016

rev adhes adhesives

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On account of the recent increase in importance of biological and microbiological adhesion in industries such as healthcare and food manufacturing many researchers are now turning to the study of materials, wettability and adhesion to develop the technology within these industries further. This is highly significant as the stem cell industry alone, for example, is currently worth £3.5 million in the United Kingdom (UK) alone. This paper reviews the current state-of-the-art techniques used for surface treatment with regards to modulating biological adhesion including laser surface treatment, plasma treatment, micro/nano printing and lithography, specifically highlighting areas of interest for further consideration by the scientific community. What is more, this review discusses the advantages and disadvantages of the current techniques enabling the assessment of the most attractive means for modulating biological adhesion, taking in to account cost effectiveness, complexity of equipment and capabilities for processing and analysis.

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Excimer laser induced patterning of polymeric surfaces

Cited by 29 publications

References 10 publications

Micromachining of polyurethane (PU) polymer using a KrF excimer laser (248nm)

Micromachining of polyurethane (PU) polymer using a KrF excimer laser (248nm)

Wettability and osteoblast cell response modulation through UV laser processing of nylon 6,6

Surface Treatments to Modulate Bioadhesion: A Critical Review

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