Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

Ahmmed, K. M. Tanvir; Grambow, Colin A.; Kietzig, Anne‐Marie

doi:10.3390/mi5041219

Cited by 348 publications

(184 citation statements)

References 153 publications

Supporting

Mentioning

181

Contrasting

Unclassified

Order By: Relevance

“…Thereby, the use of the femtosecond laser has already become an essential technology in micromachining [3][4][5][6]. Nevertheless, the laser drilling of glass is still imperfect, mainly because precision processing is impaired by the irregular microscopic damage that occurs during drilling [7].…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of damage formation in glass in the process of femtosecond laser drilling

et al. 2018

View full text Add to dashboard Cite

The development of femtosecond lasers has renovated micromachining technology, enabling the microdrilling of transparent materials at high speed. Although effective, this technique is still imperfect because irregular microscopic damage occurs during processing. Several factors in the formation of damage induced by a single laser pulse have been suggested; however, the entire mechanisms of damage formation in the process of drilling are not fully understood. Here we investigated the causes of microscopic damage both by experimentally carrying out laser drilling on chemically strengthened glass samples and by numerically analyzing the propagating stress wave and temperature distribution. We have revealed that the damage at the sidewall and bottom of a generated hole is mainly due to the stress wave, while the damage around the hole entrance is mainly due to relaxation of thermal stress. In particular, we have analyzed these processes quantitatively, demonstrating the time courses of the passage of the stress wave through the material and the temperature distribution generated by the excited electrons. Our analyses are useful in suggesting processing techniques, or suggesting glass materials suitable for laser drilling such as glass with high heat resistance, which may lead to an improvement in the quality of micromachining.

show abstract

Section: Introductionmentioning

confidence: 99%

Mechanisms of damage formation in glass in the process of femtosecond laser drilling

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The value of the el-ph coupling constant is an order of magnitude lower for silver when compared to nickel, stainless steel, or titanium. The implication of a low coupling constant is a slower transfer of energy from electrons to phonons within the lattice; the energy stored within the electrons disperses further into the bulk material and any laser-induced effects are spread out over a larger region (Tanvir Ahmmed et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Creation of micro/nano surface structures on silver using collinear double femtosecond laser pulses with different pulse separation

Roth

Zuhlke

Peng

et al. 2018

Multiscale and Multidiscip. Model. Exp. and Des.

View full text Add to dashboard Cite

Self-organized mound-like micro/nanoscale structures are reported for the first time on silver using a dual-pulse femtosecond laser surface processing technique. The dual-pulse laser processing technique reported in this paper uses femtosecond laser pulse pairs with a controlled temporal delay between the leading and trailing pulses. Using dual pulses at higher fluence values, mound-like micro/nanostructures have been created on silver samples for the first time. Formation of the self-organized microstructures is shown to be dependent on the time delay between the leading and trailing pulses. Mound-like microstructures do not develop on silver for overlapped pulses or using single-pulse femtosecond laser surface processing for the parameter space studied. Subsurface microstructure characterization of a single mound-like surface structure is analyzed by crosssectional analysis using focused ion beam milling followed by scanning electron microscopy and energy dispersive X-ray spectroscopy.

show abstract

“…These techniques cover anodization [17], polymer film roughening [18,19], electroerosion [20], and sol-gel processes [21,22]. In particular, laser machining has emerged as a novel and promising approach for the high-speed modification of interfacial properties; in fact, this technique, especially with ultrashort laser pulses, can facilitate the realization of surface textures on a multidimensional scale, similar to those found in natural biological systems, in only a one-step process [23][24][25]. Moreover, these textures can be realized without the need for clean room facilities and can be implemented in different gaseous atmospheres with the additional possibility of controlling, to some degree, the surface chemistry [10].…”

Section: Introductionmentioning

confidence: 99%

Design and characterization of textured surfaces for applications in the food industry

Lazzini¹,

Romoli²,

Blunt³

et al. 2017

Surf. Topogr.: Metrol. Prop.

View full text Add to dashboard Cite

Description of two-process surface topography W Grabon and P Pawlus -A study of variations of areal parameters on machined surfaces P Pawlus, W Grabo, R Reizer et al. AbstractThe aim of this work is to design, manufacture and characterize surface morphologies on AISI 316L stainless steel produced by a custom designed laser-texturing strategy. Surface textures were characterized at a micrometric dimension in terms of areal parameters compliant with ISO 25178, and correlations between these parameters and processing parameters (e.g. laser energy dose supplied to the material, repetition rate of the laser pulses and scanning velocity) were investigated. Preliminary efforts were devoted to the research of special requirements for surface morphology that, according to the commonly accepted research on the influence of surface roughness on cellular adhesion on surfaces, should discourage the formation of biofilms. The topographical characterization of the surfaces was performed with a coherence scanning interferometer. This approach showed that increasing doses of energy to the surfaces increased the global level of roughness as well as the surface complexity. Moreover, the behavior of the parameters S pk , S vk also indicates that, due to the ablation process, an increase in the energy dose causes an average increase in the height of the highest peaks and in the depth of the deepest dales. The study of the density of peaks S pd showed that none of the surfaces analyzed here seem to perfectly match the conditions dictated by the theories on cellular adhesion to confer anti-biofouling properties. However, this result seems to be mainly due to the limits of the resolving power of coherence scanning interferometry, which does not allow the resolution of submicrometric features which could be crucial in the prevention of cellular attachment.

show abstract

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

Cited by 348 publications

References 153 publications

Mechanisms of damage formation in glass in the process of femtosecond laser drilling

Mechanisms of damage formation in glass in the process of femtosecond laser drilling

Creation of micro/nano surface structures on silver using collinear double femtosecond laser pulses with different pulse separation

Design and characterization of textured surfaces for applications in the food industry

Contact Info

Product

Resources

About