Periodic structuration of polymer surfaces with the excimer laser radiation

Lazare, Sylvain; Bolle, Matthias; Cros, A.; Bellard, L.

doi:10.1016/0168-583x(95)00630-3

Cited by 23 publications

(12 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many different approaches for the direct writing of gratings in polymers and glasses have been developed. For example, using polarized UV laser beams and fluences below the threshold of polymer ablation, laser-induced periodic surface structures are formed (LIPSS) [350,351]. Gratings with spacings in the submicron range can be produced in this way.…”

Section: Introductionmentioning

confidence: 99%

Laser Application of Polymers

Lippert

2004

Polymers and Light

150

View full text Add to dashboard Cite

Laser ablation of polymers has been studied with designed materials to evaluate the mechanism of ablation and the role of photochemically active groups on the ablation process, and to test possible applications of laser ablation and designed polymers. The incorporation of photochemically active groups lowers the threshold of ablation and allows high-quality structuring without contamination and modification of the remaining surface. The decomposition of the active chromophore takes place during the excitation pulse of the laser and gaseous products are ejected with supersonic velocity. Time-of-flight mass spectrometry reveals that a metastable species is among the products, suggesting that excited electronic states are involved in the ablation process. Experiments with a reference material, i.e., polyimide, for which a photothermal ablation mechanism has been suggested, exhibited pronounced differences. These results strongly suggest that, in case of designed polymers which contain photochemically active groups, a photochemical part in the ablation mechanism cannot be neglected. Various potential applications for laser ablation and the special photopolymers were evaluated and it became clear that the potential of laser ablation and specially designed material is in the field of microstructuring. Laser ablation can be used to fabricate three-dimensional elements, e.g., microoptical elements.Keywords Laser ablation · Ablation mechanism · Photopolymers · Polyimide · Spectroscopy This was not always true, of course. For many years, the laser was viewed as "an answer in search of a question". That is, it was seen as an elegant device, but one with no real useful application outside of fundamental scientific research. In the last two to three decades however, numerous laser applications have moved from the laboratory to the industrial workplace or the commercial market. Lasers are unique energy sources characterized by their spectral purity, spatial and temporal coherence, and high average peak intensity. Each of these characteristics has led to applications that take advantage of these qualities: -Spatial coherence: e.g., remote sensing, range finding and many holographic techniques. -Spectral purity: e.g., atmospheric monitoring based on high-resolution spectroscopies. -and of course the many other applications in communication and storage, e.g., CDs.All of these high-tech applications have come to define everyday life in the late twentieth century. One property of lasers, however, that of high intensity, did not immediately lead to "delicate" applications but rather to those requiring "brute force". That is, the laser was used in applications for removing material or heating. The first realistic applications involved cutting, drilling, and welding, and the laser was little more advanced than a saw, a drill, or a torch. In a humorous vein A.L. Schawlow proposed and demonstrated the first "laser eraser" in 1965 [4], using the different absorptivities of paper and ink to remove the ink without damaging the und...

show abstract

Section: Introductionmentioning

confidence: 99%

Laser Application of Polymers

Lippert

2004

Polymers and Light

150

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5] In the case of polymers, irradiation with a linearly polarized laser beam induces self-organized ripple structure formation within a narrow fluence range well below the ablation threshold. [6][7][8][9][10][11] The period of the ripples L depends on the laser wavelength employed and on the angle of incidence of the radiation according to the expression 12 L = l/(n À sin(y)) (1) where l is the laser wavelength, n the effective refractive index of the material, and y the angle of incidence of the laser beam. LIPSS are formed on the material surface as a result of the interference between the incoming and the surface-scattered waves, in such a way that an inhomogeneous intensity distribution, together with a feedback mechanism, results in the enhancement of the modulation depth.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical modifications accompanying UV laser induced surface structures on poly(ethylene terephthalate) and their effect on adhesion of mesenchymal cells

Rebollar

Pérez

Hernández

et al. 2014

Phys. Chem. Chem. Phys.

118

View full text Add to dashboard Cite

This work reports on the formation of different types of structures on the surface of polymer films upon UV laser irradiation. Poly(ethylene terephthalate) was irradiated with nanosecond UV pulses at 193 and 266 nm. The polarization of the laser beam and the irradiation angle of incidence were varied, giving rise to laser induced surface structures with different shapes and periodicities. The irradiated surfaces were topographically characterized by atomic force microscopy and the chemical modifications induced by laser irradiation were inspected via micro-Raman and fluorescence spectroscopies. Contact angle measurements were performed with different liquids, and the results evaluated in terms of surface free energy components. Finally, in order to test the influence of surface properties for a potential application, the modified surfaces were used for mesenchymal stem cell culture assays and the effect of nanostructure and surface chemistry on cell adhesion was evaluated.

show abstract

“…Different techniques such as those based on solution flow and evaporation, low-energy ion beam erosion, and advanced lithography have been proposed in order to produce superficial nanostructures on polymers. − A current trend however is looking for alternative processes to lithography aiming to avoid the necessity of demanding experimental conditions, like clean rooms, high vacuum, or complex mask fabrication, among others. Formation of laser-induced periodic surface structures (LIPSS) has been observed on the surface of different materials, such as metals, semiconductors, and dielectrics, upon irradiation with lasers at different wavelengths from ultraviolet to infrared and with different pulse durations from nanoseconds to femtoseconds. − In the case of polymers, irradiation with a linearly polarized laser beam induces self-organized ripple structure formation within a narrow fluence range well below the ablation threshold. − LIPSS can be prepared in both spin-coated and free-standing polymer films . This fact makes LIPSS a potential method to obtain large surface area and good quality samples.…”

Section: Introductionmentioning

confidence: 99%

In Situ Monitoring of Laser-Induced Periodic Surface Structures Formation on Polymer Films by Grazing Incidence Small-Angle X-ray Scattering

et al. 2015

View full text Add to dashboard Cite

Citation: REBOLLAR, E. ... et al., 2015. In situ monitoring of laser-induced periodic surface structures formation on polymer films by grazing incidence small-angle X-ray scattering. Langmuir, 31 (13), pp. 3973 -3981.Additional Information:• This paper was accepted for publication in the journal Langmuir [ c The formation of Laser Induced Periodic Surface Structures (LIPSS) on model spin-coated polymer films has been followed in situ by Grazing Incidence Small Angle X-ray Scattering (GISAXS) using synchrotron radiation. The samples were irradiated at different repetition rates ranging from 1 up to 10 Hz by using the 4th harmonic of a Nd:YAG laser (266 nm) with pulses of 8 ns. Simultaneously GISAXS patterns were acquired during laser irradiation. The variation of both the GISAXS signal with the number of pulses and the LIPSS period with laser irradiation time is revealing key kinetic aspects of the nanostructure formation process. By considering 2 LIPSS as one-dimensional paracrystalline lattice and using a correlation found between the paracrystalline disorder parameter, g, and the number of reflections observed in the GISAXS patterns, the variation of the structural order of LIPSS can be assessed. The role of the laser repetition rate in the nanostructure formation has been clarified. For high pulse repetition rates (i.e. 10 Hz), LIPSS evolve in time to reach the expected period matching the wavelength of the irradiating laser. For lower pulse repetition rates LIPSS formation is less effective and the period of the ripples never reaches the wavelength value. Results support and provide information on the existence of a feedback mechanism for LIPSS formation in polymer films.

show abstract

Periodic structuration of polymer surfaces with the excimer laser radiation

Cited by 23 publications

References 4 publications

Laser Application of Polymers

Laser Application of Polymers

Physicochemical modifications accompanying UV laser induced surface structures on poly(ethylene terephthalate) and their effect on adhesion of mesenchymal cells

In Situ Monitoring of Laser-Induced Periodic Surface Structures Formation on Polymer Films by Grazing Incidence Small-Angle X-ray Scattering

Contact Info

Product

Resources

About