Ultraviolet and infrared femtosecond laser induced periodic surface structures on thin polymer films

Rebollar, Esther; Aldana, Javier R. Vázquez de; Pérez-Hernández, J. A.; Ezquerra, Tiberio A.; Moreno, Pablo; Castillejo, Marta

doi:10.1063/1.3679103

Cited by 76 publications

(70 citation statements)

References 27 publications

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“…In fact, the AFM analysis of the boundary between a non-irradiated and an irradiated area shows that the peaks and valleys of the ripples lie, respectively, above and below the initial surface level. 15 The height of the untreated surface is equivalent to the average height of the nanostructured region of the polymer film, thus confirming that the amount of material removed during laser irradiation is negligible and that the structures originate from a self-organization process not involving ablation. .…”

Section: Afmmentioning

confidence: 68%

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Assessment of femtosecond laser induced periodic surface structures on polymer films

Rebollar

Aldana

Martín-Fabiani

et al. 2013

Phys. Chem. Chem. Phys.

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aIn this work we present the formation of laser induced periodic surface structures (LIPSS) on spin-coated thin films of several model aromatic polymers including poly(ethylene terephthalate), poly(trimethylene terephthalate) and poly carbonate bis-phenol A upon irradiation with femtosecond pulses of 795 and 265 nm at fluences well below the ablation threshold. LIPSS are formed with period lengths similar to the laser wavelength and parallel to the direction of the laser polarization vector. Formation of LIPSS upon IR irradiation at 795 nm, a wavelength at which the polymers absorb weakly, contrasts with the absence of LIPSS in this spectral range upon irradiation with nanosecond pulses. Real and reciprocal space characterization of LIPSS obtained by Atomic Force Microscopy (AFM) and Grazing Incidence Small Angle X-ray Scattering (GISAXS), respectively, yields well correlated morphological information. Comparison of experimental and simulated GISAXS patterns suggests that LIPSS can be suitably described considering a quasi-one-dimensional paracrystalline lattice and that irradiation parameters have an influence on the order of such a lattice. Fluorescence measurements, after laser irradiation, provide indirect information about dynamics and structure of the polymer at the molecular level. Our results indicate that the LIPSS are formed by interference of the incident and surface scattered waves. As a result of this process, heating of the polymer surface above its glass transition temperature takes place enabling LIPSS formation.

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Section: Afmmentioning

confidence: 68%

“…Values obtained for both 795 and 265 nm at the fluences used for LIPSS formation 15 are well above the unity, indicative of a MP ionization mechanism governing the initial light absorption step. The generation of quasi-free electrons at the early stages of the interaction with the laser pulse has been reported in the case of polymers.…”

Section: à2mentioning

confidence: 83%

Assessment of femtosecond laser induced periodic surface structures on polymer films

Rebollar

Aldana

Martín-Fabiani

et al. 2013

Phys. Chem. Chem. Phys.

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“…This means that at least in the beginning of structure formation its period is shorter than the incident light wavelength, as observed experimentally. 26 One can see also that the maximum growth rate for k L ¼ 795 nm is lower by a factor 20 than that for k L ¼ 265 nm. Assuming that the surface structure amplitude is proportional to the growth rate, we may conclude surface structure generation with k L ¼ 795 nm requires about 20 times higher fluence than that with k L ¼ 265 nm, which is also consistent with available experimental data.…”

mentioning

confidence: 83%

“…Assuming that the surface structure amplitude is proportional to the growth rate, we may conclude surface structure generation with k L ¼ 795 nm requires about 20 times higher fluence than that with k L ¼ 265 nm, which is also consistent with available experimental data. 26 It is worth pointing out that LIMIS with pulsed excitation as illustrated in Fig. 4 is quite high even for relatively high heat conductance and low thermal expansion.…”

mentioning

confidence: 99%

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Light induced modulation instability of surfaces under intense illumination

Burlakov

Foulds

Goriely

2013

Applied Physics Letters

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Understanding the Relation between Pulse Duration and Topography Evolution of Polyether Ether Ketones Textures by Ultrashort Infrared Laser Interference Patterning

et al. 2022

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Since it entered the market in the early 1980s, the deployment of polyaryl ether ketones has gained prominence in a plethora of fields linked to advanced materials design as direct substitutes for metal and ceramic counterparts. [1][2][3][4] For example, in the automotive and aeronautics industries, these materials are being implemented in connectors, seals, and insulators for pumps, which significantly reduces the final weight of the products. [5] Furthermore, in the biomedical field, they have been used in the manufacture of surgical instruments and, more recently, in tissue engineering scaffolds and prostheses. [6][7][8] Particularly, polyether ether ketone (PEEK) is increasingly used in dental implants, spine tumor applications, and reconstruction of the craniomaxillofacial complex. [9,10] The chemical structure of this thermoplastic polymer provides adequate chemical resistance, mechanical properties similar to those of human bone, and nonaccumulation and bioinertness features. In addition, this polymer is susceptible to being postsynthesis superficially modified to give rise to novel functionalities or to improve its inherent ones. For instance, surface treatments allow improving characteristics such as friction, lubrication, wettability, cell infiltration, or osseointegration. [11,12] An interesting approach to achieving topographical modifications of material while minimizing or even avoiding chemical changes is the utilization of laser micro/nanoprocessing techniques. Several laser-based techniques have been used to manufacture 1D and 2D structures on PEEK. Among them, direct laser

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Ultraviolet and infrared femtosecond laser induced periodic surface structures on thin polymer films

Cited by 76 publications

References 27 publications

Assessment of femtosecond laser induced periodic surface structures on polymer films

Assessment of femtosecond laser induced periodic surface structures on polymer films

Light induced modulation instability of surfaces under intense illumination

Understanding the Relation between Pulse Duration and Topography Evolution of Polyether Ether Ketones Textures by Ultrashort Infrared Laser Interference Patterning

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