Laser Interactions with Organic/Polymer Materials

Rebollar, Esther; Castillejo, Marta

doi:10.1007/978-3-319-69537-2_13-1

Cited by 8 publications

(4 citation statements)

References 268 publications

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“…11 Several process parameters significantly affect the consistency of the fabricated structures during ablation, including the laser source, laser power, media, and substrate material, and it is possible to obtain high-quality, low-cost, reproducible, and consistent structures by properly organizing these parameters. 12 For instance, in a recently published study, picosecond laser microprocessing was used to build micro-grooves and micro-cavities on poly (L-lactide) (PLLA) plates, and the morphology, behavior, and differentiation potential of human mesenchymal stem cells (hMSCs) were investigated on the surfaces. 13 In another recent study, polycaprolactone/hydroxyapatite (PCL/HA) composite scaffolds were prepared by stacking multiple sheets exposed to laser micromachining.…”

Section: Introductionmentioning

confidence: 99%

Surface channel patterned and endothelialized poly(glycerol sebacate) based elastomers

et al. 2022

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Prevascularization of tissue equivalents is critical for fulfilling the need for sufficient vascular organization for nutrient and gas transport. Hence, endothelial cell culture on biomaterials is of great importance for researchers. Numerous alternate strategies have been suggested in this sense, with cell-based methods being the most commonly employed. In this study, poly (glycerol sebacate) (PGS) elastomers with varying crosslinking ratios were synthesized and their surfaces were patterned with channels by using laser ablation technique. In order to determine an ideal material for cell culture studies, the elastomers were subsequently mechanically, chemically, and biologically characterized. Following that, human umbilical vein endothelial cells (HUVECs) were seeded into the channels established on the PGS membranes and cultured under various culture conditions to establish the optimal culture parameters. Lastly, the endothelial cell responses to the synthesized PGS elastomers were evaluated. Remarkable cell proliferation and impressive cellular organizations were noticed on the constructs created as part of the investigation. On the concrete output of this research, arrangements in various geometries can be created by laser ablation method and the effects of various molecules, drugs or agents on endothelial cells can be evaluated. The platforms produced can be employed as an intermediate biomaterial layer containing endothelial cells for vascularization of tissue-engineered structures, particularly in layer-by-layer tissue engineering approaches.

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Section: Introductionmentioning

confidence: 99%

Surface channel patterned and endothelialized poly(glycerol sebacate) based elastomers

et al. 2022

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“…The process is much more complex if several irradiations are repeated along the same path and considering different writing speeds. Laser irradiation is a very complex phenomenon that can simultaneously produce several thermally activated effects, including melting, vaporization, depolymerization, retro-polymerization, and polymer decomposition processes, as well as ablation and pyrolysis of the polymer and fillers [ 38 , 39 ]. Partial combustion of carbonaceous components is also possible under inert flow conditions when the processing environment is not sealed.…”

Section: Resultsmentioning

confidence: 99%

Functional Piezoresistive Polymer Composites Based on CO2 Laser-Irradiated Graphene Oxide-Loaded Polyurethane: Morphology, Structure, Electrical and Piezoresistive Properties

Mastropasqua

Veca²,

Damin

et al. 2022

Nanomaterials

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Nanocomposite materials have recently attracted great attention for their wide range of applications, such as in smart materials, flexible electronics, and deformation sensing applications. Such materials make it possible to combine a polymer with functional fillers. In this study, flexible artificial leathers, exhibiting insulating properties and containing 1.5 or 2wt.% of graphene oxide (GO) in the polyurethane (PU) layer, were electrically activated via CO2 laser irradiation to obtain conductive paths at the surface exposed to the laser beam. As the material retained its insulating properties out of the irradiation areas, the laser scribing method allowed, at least in principle, a printed circuit to be easily and quickly fabricated. Combining a variety of investigation methods, including scanning electron microscopy (SEM), optical profilometry, IR and Raman spectroscopies, and direct current (DC) and alternate current (AC) electrical measurements, the effects of the laser irradiation were investigated, and the so-obtained electrical properties of laser-activated GO/PU regions were elucidated to unveil their potential use in both static and dynamic mechanical conditions. In more detail, it was shown that under appropriate CO2 laser irradiation, GO sheets into the GO/PU layer were locally photoreduced to form reduced-GO (RGO) sheets. It was verified that the RGO sheets were entangled, forming an accumulation path on the surface directly exposed to the laser beam. As the laser process was performed along regular paths, these RGO sheets formed electrically conductive wires, which exhibited piezoresistive properties when exposed to mechanical deformations. It was also verified that such piezoresistive paths showed good reproducibility when subjected to small flexural stresses during cyclic testing conditions. In brief, laser-activated GO/PU artificial leathers may represent a new generation of metal-free materials for electrical transport applications of low-current signals and embedded deformation sensors.

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“…Increasing the number of beams participating in the interference produces more complex intensity patterns; for instance, in planar configurations, three beams can produce a two-dimensional dot pattern, while four beams can be used to produce a line pattern with thinner and higher peaks and thicker areas of low intensity than a two-beam pattern [41,59]. An example for non-planar beams is included in Fig.…”

Section: Direct Laser-interference Patterning (Dlip) and Laser-induce...mentioning

confidence: 99%

Probing Light by Matter: Implications of Complex Illumination on Ultrafast Nanostructuring

Florian

Du²,

Arnold³

2023

Springer Series in Optical Sciences

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Pushing the limits of precision and reproducibility in ultrafast laser-based nanostructuring requires detailed control over the properties of the illumination. Most traditional methods of laser-based manufacturing rely on the simplicity of Gaussian beams for their well-understood propagation behavior and ease of generation. However, a variety of benefits can be obtained by moving beyond Gaussian beams to single or multiple tailored beams working toward optimal spatial and temporal control over the beam profiles. In this chapter, we center our attention on methods to generate and manipulate complex light beams and the resulting material interactions that occur in response to irradiations with these non-traditional sources. We begin with a discussion on the main differences between Gaussian and more complex light profiles, describing the mechanisms of phase and spatial control before narrowing the discussion to approaches for spatial structuring associated with materials processing with ultrashort laser pulses. Such structuring can occur in both far-field propagating architectures, considering rapidly varying spatial profiles generated mechanically or optically, as well as near-field, non-propagating beams associated with plasmonic and dielectric systems. This chapter emphasizes some of the unique abilities of complex light to shape materials at the nanoscale from a fundamental perspective while referencing potential applications of such methods.

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Laser Interactions with Organic/Polymer Materials

Cited by 8 publications

References 268 publications

Surface channel patterned and endothelialized poly(glycerol sebacate) based elastomers

Surface channel patterned and endothelialized poly(glycerol sebacate) based elastomers

Functional Piezoresistive Polymer Composites Based on CO2 Laser-Irradiated Graphene Oxide-Loaded Polyurethane: Morphology, Structure, Electrical and Piezoresistive Properties

Probing Light by Matter: Implications of Complex Illumination on Ultrafast Nanostructuring

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