Cellular reactions toward nanostructured silicon surfaces created by laser ablation

Wallat, Katrin; Dörr, Daniel; Harzic, Ronan Le; Stracke, Frank; Sauer, Daniel; Neumeier, Manuel; Kovtun, Anna; Zimmermann, Heiko; Epple, Matthias

doi:10.2351/1.4732594

Cited by 18 publications

(10 citation statements)

References 24 publications

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“…LIPSS can be generated in a single step laser irradiation process on almost any material and provide a simple way of surface nanostructuring toward a control of optical, mechanical, or chemical surface properties for functionalization. This can be used for various applications [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Laser-induced periodic surface structures on titanium upon single- and two-color femtosecond double-pulse irradiation

Höhm¹,

Rosenfeld²,

Krüger³

et al. 2015

Opt. Express

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Single- and two-color double-fs-pulse experiments were performed on titanium to study the dynamics of the formation of laser-induced periodic surface structures (LIPSS). A Mach-Zehnder inter-ferometer generated polarization controlled (parallel or cross-polarized) double-pulse sequences in two configurations - either at 800 nm only, or at 400 and 800 nm wavelengths. The inter-pulse delays of the individual 50-fs pulses ranged up to some tens of picoseconds. Multiple of these single- or two-color double-fs-pulse sequences were collinearly focused by a spherical mirror to the sample surface. In both experimental configurations, the peak fluence of each individual pulse was kept below its respective ablation threshold and only the joint action of both pulses lead to the formation of LIPSS. Their resulting characteristics were analyzed by scanning electron microscopy and the periods were quantified by Fourier analyses. The LIPSS periods along with the orientation allow a clear identification of the pulse which dominates the energy coupling to the material. A plasmonic model successfully explains the delay-dependence of the LIPSS on titanium and confirms the importance of the ultrafast energy deposition stage for LIPSS formation.

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Section: Introductionmentioning

confidence: 99%

Laser-induced periodic surface structures on titanium upon single- and two-color femtosecond double-pulse irradiation

Höhm¹,

Rosenfeld²,

Krüger³

et al. 2015

Opt. Express

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“…However, LIPSS generation on dielectric materials, such as fused silica, is highly attractive, since manifold applications of these materials would benefit from the possibility to alter the wettability properties e.g. for microfluidics [3,4] or the cell growth in biotechnical applications [7,10] by the periodic surface structures.…”

Section: Fig 1 Scanning Electron Microscope Image Of Lsfl On Stainlementioning

confidence: 99%

Simulation of Process Parameters Towards the Generation of Low Spatial Frequency Lipss on Dielectric Materials

Schwarz¹,

Rung²,

Hellmann³

2016

The Publications of the MultiScience - XXX. MicroCAD International Scientific Conference

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In this paper we show simulations of low spatial frequency laser-induced period surface structures (LSFL) and deduce appropriate process parameters for their specific experimental generation on dielectrics. We employed the established efficacy factor theory to forecast the periodicity and the orientation of low spatial frequency laser-induced period surface structures including a Drude-model to determine the required carrier density for LSFL generation. This approach is applied exemplarily to the LSFL generation on fused silica. We extend the theoretical approach by a rate equation based calculation of the required laser fluence to excite the necessary carrier density by photo-and avalanche ionization using ultra-short pulsed laser irradiation.

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“…e.g., Reference [12] and references therein) influencing the physical and chemical properties of surfaces. They can be applied to control wettability and friction of surfaces [13,14], to generate structural colors [15] or to optimize cell growth in biomedical applications [16].…”

Section: Introductionmentioning

confidence: 99%

Monitoring of Evolving Laser Induced Periodic Surface Structures

2019

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Laser induced periodic surface structures (LIPSS) are generated on titanium and silicon nitride surfaces by multiple femtosecond laser pulses. An optical imaging system is used to observe the backscattered light during the patterning process. A characteristic fringe pattern in the backscattered light is observed and evidences the surface modification. Experiments are complemented by finite difference time domain numerical simulations which clearly show that the periodic surface modulation leads to characteristic modulations in the coherently scattered light field. It is proposed that these characteristic fringe pattern can be used as a very fast and low-cost monitor of LIPSS formation formation during the manufacturing process.

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Cellular reactions toward nanostructured silicon surfaces created by laser ablation

Cited by 18 publications

References 24 publications

Laser-induced periodic surface structures on titanium upon single- and two-color femtosecond double-pulse irradiation

Laser-induced periodic surface structures on titanium upon single- and two-color femtosecond double-pulse irradiation

Simulation of Process Parameters Towards the Generation of Low Spatial Frequency Lipss on Dielectric Materials

Monitoring of Evolving Laser Induced Periodic Surface Structures

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