Assessment of femtosecond laser induced periodic surface structures on polymer films

Rebollar, Esther; Aldana, Javier R. Vázquez de; Martín-Fabiani, Ignacio; Hernández, Margarita; Rueda, Daniel R.; Ezquerra, Tiberio A.; Domingo, Concepción; Moreno, Pablo; Castillejo, Marta

doi:10.1039/c3cp51523k

Cited by 103 publications

(70 citation statements)

References 55 publications

(141 reference statements)

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“…The most commonly reported laser-induced structures on polymers are LIPSS whose orientation is dependent on the incoming light polarization [11,12]. Another feature of interest is laser-induced porosity, which has been observed to appear on PMMA [13,14] and PC [14].…”

Section: Introductionmentioning

confidence: 99%

Optical and chemical effects governing femtosecond laser-induced structure formation on polymer surfaces

Assaf¹,

Kietzig²

2018

Materials Today Communications

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With the emergence of femtosecond technology, laser machining has recently led to the creation of novel porous structures on polymers. However, the mechanism behind their formation is yet to be understood. In this study, the dependence of femtosecond laser-induced surface structure on processing parameters is established at two distinct wavelengths (800 nm and 275 nm) for six different polymer films: LDPE, PC, PET, PLA, PMMA, and PTFE. All of the observed structures are then optically and chemically characterized as a first step towards elucidating their formation mechanism. The threshold fluence at operating conditions was determined to be the main parameter affecting porosity formation during machining. Furthermore, for transparent films, a transition from multiphoton to linear absorption is observed to occur at 800 nm but not at 275 nm. This shift in optical properties was determined to be a major contributor to incubation effects.These observations are also in agreement with UV/VIS analysis as measurements show that polymers with a cut-off wavelength lower than that of the laser beam undergo a shift in absorption behavior. Finally, some polymers experience a continuous darkening of their surface with increasing fluence due to an increasing degree of photo-oxidation.

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Section: Introductionmentioning

confidence: 99%

Optical and chemical effects governing femtosecond laser-induced structure formation on polymer surfaces

Assaf¹,

Kietzig²

2018

Materials Today Communications

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“…One can eliminate the potential involvement of the ripple mechanism, 93 that is, the periodic structures created by light interference, either between incident laser beams or between the incident beam and its excited waves. In the ripple formation, the patterns replicate the light intensity redistributions, and the structure periods depend on the laser wavelength and the beam incident angles.…”

Section: Plasmonic Hot-electron Transfer and Nanofabricationmentioning

confidence: 99%

Insight into plasmonic hot-electron transfer and plasmon molecular drive: new dimensions in energy conversion and nanofabrication

2017

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Localized surface plasmon resonance (LSPR) of plasmonic nanoparticles and nanostructures has attracted wide attention because the nanoparticles exhibit a strong near-field enhancement through interaction with visible light, enabling subwavelength optics and sensing at the single-molecule level. The extremely fast LSPR decays have raised doubts that such nanoparticles have use in photochemistry and energy storage. Recent studies have demonstrated the capability of such plasmonic systems in producing LSPR-induced hot electrons that are useful in energy conversion and storage when combined with electron-accepting semiconductors. Due to the femtosecond timescale, hot-electron transfer is under intense investigation to promote ongoing applications in photovoltaics and photocatalysis. Concurrently, hot-electron decay results in photothermal responses or plasmonic heating. Importantly, this heating has received renewed interest in photothermal manipulation, despite the developments in optical manipulation using optical forces to move and position nanoparticles and molecules guided by plasmonic nanostructures. To realize plasmonic heating-based manipulation, photothermally generated flows, such as thermophoresis, the Marangoni effect and thermal convection, are exploited. Plasmon-enhanced optical tweezers together with plasmon-induced heating show potential as an ultimate bottom-up method for fabricating nanomaterials. We review recent progress in two fascinating areas: solar energy conversion through interfacial electron transfer in gold-semiconductor composite materials and plasmon-induced nanofabrication.

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“…Previous studies on the evolution with time/number of laser pulses of LIPSS have been carried out by irradiating a given sample with a certain number of pulses and by performing the structural characterization ex-situ. 15,18,22 This procedure limits the amount of samples and rules out in situ analysis and the investigation of laser irradiation at high repetition rate.…”

Section: 25mentioning

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

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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.

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Assessment of femtosecond laser induced periodic surface structures on polymer films

Cited by 103 publications

References 55 publications

Optical and chemical effects governing femtosecond laser-induced structure formation on polymer surfaces

Optical and chemical effects governing femtosecond laser-induced structure formation on polymer surfaces

Insight into plasmonic hot-electron transfer and plasmon molecular drive: new dimensions in energy conversion and nanofabrication

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

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