Nanoparticles based laser-induced surface structures formation on mesoporous silicon by picosecond laser beam interaction

Talbi, Abderazek; Petit, Agnès; Melhem, Amer; Stolz, Arnaud; Boulmer‐Leborgne, C.; Gautier, Gaël; Defforge, Thomas; Semmar, Nadjib

doi:10.1016/j.apsusc.2015.09.003

Cited by 18 publications

(4 citation statements)

References 22 publications

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“…The absorption of laser energy by these structures is not uniform: the ablation process is enhanced in the valleys between these structures, leading to an amplification of the phenomenon and to a quasi-uniform spike distribution on the surface. As reported in our previous work [28], in the case of MeP-Si, the use of a relatively low fluence (with either a picosecond or a femtosecond beam) leads to LIPSS formation through the organization of nanoparticles generated after a few shots. Also, in the same work, a periodic melt material was formed but only after a high number of shots (N>10 4 ).…”

Section: Figure 1 Top and Cross Section Sem Views Of Mep-si Substratesupporting

confidence: 59%

Micro-spikes formed on mesoporous silicon by UV picosecond laser irradiation

Semmar

Talbi

Mikikian

et al. 2020

Applied Surface Science

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Conical spikes with sizes ranging between 0.2 and 5 µm were formed on a mesoporous silicon surface under ultraviolet picosecond laser irradiation in ambient air. Scanning electron microscopy was employed to visualize the successive steps in the formation of the spikes. On increasing the number of shots (up to 1000) at a fluence of 400 mJ/cm², an increase in the size and an enhancement in the distribution of spikes were observed. The experimental observations revealed that the formation and the growth of these structures were mainly due to material ablation and removal mechanisms. FTIR analysis on several large (5X 5 mm2) irradiated zones showed an enhancement in the absorption coefficient mainly in the IR range from 1 to 8 µm versus the size of the microstructures.

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Section: Figure 1 Top and Cross Section Sem Views Of Mep-si Substratesupporting

confidence: 59%

Micro-spikes formed on mesoporous silicon by UV picosecond laser irradiation

Semmar

Talbi

Mikikian

et al. 2020

Applied Surface Science

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“…Although lithographic methods are commonly used for generating polymer structures at the nanoscale [26][27][28] and aim at reproducibility and low cost, they require multiple-step procedures involving clean-room facilities, high vacuum or complex mask fabrication. As an alternative, laser surface patterning techniques such as the formation of Laser Induced Periodic Surface Structures (LIPSS) have demonstrated to provide versatility and reliability and constitute potential methods to obtain large processed surface areas in many types of materials [29][30][31][32], including polymers [33][34][35]. The formation of LIPSS in polymer surfaces has been observed by using lasers with pulse duration from nanosecond (ns) to femtosecond (fs), at wavelengths from the ultraviolet to the infrared [33,34,[36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Laser induced periodic surface structures formation by nanosecond laser irradiation of poly (ethylene terephthalate) reinforced with Expanded Graphite

Rodríguez-Beltrán

Hernández

Paszkiewicz

et al. 2018

Applied Surface Science

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We report on the formation of Laser Induced Periodic Surface Structures in poly (ethylene terephthalate) and poly (ethylene terephthalate)/Expanded Graphite films by laser irradiation with nanosecond pulses at 266 nm. The characterization studies show that the quality of the ripples depends strongly on the irradiation time and fluence and the optimal conditions for obtaining LIPSS are affected by the amount of the expanded graphite present in the film due to the differences in crystallinity, thermal conductivity and thermal diffusivity of the nanocomposites. Physicochemical modifications in the materials were inspected by Raman spectroscopy, the colloidal probe technique and contact angle measurements using different liquids. Results show that there is an increase of the hydrophilicity of the surfaces after laser irradiation together with an increase of the surface free energy and in particular of its polar component. Additionally, the adhesion force estimated by the colloidal probe technique increases after laser nanostructuring.

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“…Thus, higher laser intensities are needed to work near the ablation threshold to induce LIPSS formation but simultaneously this would lead to enhanced damage formation in such fragile ceramic materials, and thus subsequently reduces the process window. To circumvent such limitations, it has been shown that the deposition of a thin metallic film on the substrate surface prior to laser structuring was beneficial either for lowering the threshold of LIPSS formation on dielectrics and semiconductors or to directly structuring the irradiated thin films by ultrashort beams [18][19][20][21][22][23][24][25][26][27]. For example, Liu et al [28] have achieved HSFL fine structures (period ~100 nm) on the surface of ZnO assisted by aluminum film after femtosecond laser processing at 800 nm and 120 fs.…”

Section: Introductionmentioning

confidence: 99%