Ultra-short-pulse laser ablation and modification of fully sprayed single walled carbon nanotube networks

Spellauge, Maximilian; Loghin, F.; Sotrop, Jürgen; Domke, Matthias; Bobinger, Marco; Abdellah, Alaa; Becherer, Markus; Lugli, Paolo; Huber, Heinz P.

doi:10.1016/j.carbon.2018.05.074

Cited by 28 publications

(8 citation statements)

References 43 publications

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“…Measuring technique provides information about the actual laser beam spot size despite the beam quality factor M 2 . It is valid for a Gaussian beam with a good beam qualify factor of M 2 = 1.1 52 , moderate beam quality factor of M 2 = 1.3 53 – 55 , and even for multimode beam with a poor beam quality factor of M 2 = 95 56 . Also, this measuring technique is valid for a highly elliptical Gaussian beam 57 .…”

Section: Methodsmentioning

confidence: 99%

Advanced laser scanning for highly-efficient ablation and ultrafast surface structuring: experiment and model

Žemaitis

Gaidys

Brikas

et al. 2018

Sci Rep

121

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Ultra-short laser pulses are frequently used for material removal (ablation) in science, technology and medicine. However, the laser energy is often used inefficiently, thus, leading to low ablation rates. For the efficient ablation of a rectangular shaped cavity, the numerous process parameters such as scanning speed, distance between scanned lines, and spot size on the sample, have to be optimized. Therefore, finding the optimal set of process parameters is always a time-demanding and challenging task. Clear theoretical understanding of the influence of the process parameters on the material removal rate can improve the efficiency of laser energy utilization and enhance the ablation rate. In this work, a new model of rectangular cavity ablation is introduced. The model takes into account the decrease in ablation threshold, as well as saturation of the ablation depth with increasing number of pulses per spot. Scanning electron microscopy and the stylus profilometry were employed to characterize the ablated depth and evaluate the material removal rate. The numerical modelling showed a good agreement with the experimental results. High speed mimicking of bio-inspired functional surfaces by laser irradiation has been demonstrated.

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Section: Methodsmentioning

confidence: 99%

Advanced laser scanning for highly-efficient ablation and ultrafast surface structuring: experiment and model

Žemaitis

Gaidys

Brikas

et al. 2018

Sci Rep

121

View full text Add to dashboard Cite

show abstract

“…During the laser line sweep, there are two critical parameters, including single-pulse energy ( E p ) and the pulse overlap rate ( OL ) to together affect the processing quality. The relative position of two adjacent laser pulses is represented by OL , which is defined as follows: where v is the scan speed (100–3000 mm·s –1 ) controlled by the galvanometer in a scanner. The position and energy relationship of adjacent laser pulses is shown in Figure , and three partly overlapped green spheres are arranged along the scan direction.…”

Section: Resultsmentioning

confidence: 99%

Rapid Selective Ablation and High-Precision Patterning for Micro-Thermoelectric Devices Using Femtosecond Laser Directing Writing

Zhou

Zhu

Xie

et al. 2022

ACS Appl. Mater. Interfaces

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Highly integrated miniature thermoelectric (TE) devices are desirable for applications of chip thermal management and self-powered energy harvesting. Currently, further performance improvement of micro-TE devices is largely limited by micro–nano-patterned processing, which shows the incompatibility with high-performance TE material fabrication or contradiction between machining accuracy and efficiency. This work presents a useful method to flexibly achieve high-precision array patterning for the micro-TE device through the femtosecond laser direct writing technique. By experimentally examining the material ablation process and numerically analyzing the electron-lattice temperature, the laser energy threshold for different materials is determined to obtain the selective removal between TE materials and metallic electrodes. Furthermore, the evaluation criteria are established between the formation quality of microgroove in the array structure and the laser pulse energy distribution, and the shape-control and property-control pattern processing can be realized through the reasonable control of the laser energy. Consequently, the Bi2Te3-based TE pattern with a competitive leg density (496 pairs/cm2) and a high filling factor (55%) is successfully constructed.

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“…Surfactant-loaded halloysite nanotubes (HNTs) show the potentiality to replace traditional liquid dispersant formulations enhancing marine oil spill remediation [ 129 , 130 , 131 ]. Other cheap and environmentally sustainable alternatives to face oil spill clean-up are the three-dimensional (3D) aerogels and carbon-based sponges that can be obtained through different procedures [ 132 , 133 , 134 ]. Compared with traditional sorbents, the resulting 3D materials exhibit a larger oil sorption capacity, high hydrophobicity and oleophilicity, mechanical stability, large surface areas and are reusable and/or recyclable [ 135 , 136 , 137 , 138 , 139 ].…”

Section: Enms Employed For Marine Environment Remediation and Theimentioning

confidence: 99%

The Era of Nanomaterials: A Safe Solution or a Risk for Marine Environmental Pollution?

et al. 2021

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In recent years, the application of engineered nanomaterials (ENMs) in environmental remediation gained increasing attention. Due to their large surface area and high reactivity, ENMs offer the potential for the efficient removal of pollutants from environmental matrices with better performances compared to conventional techniques. However, their fate and safety upon environmental application, which can be associated with their release into the environment, are largely unknown. It is essential to develop systems that can predict ENM interactions with biological systems, their overall environmental and human health impact. Until now, Life-Cycle Assessment (LCA) tools have been employed to investigate ENMs potential environmental impact, from raw material production, design and to their final disposal. However, LCA studies focused on the environmental impact of the production phase lacking information on their environmental impact deriving from in situ employment. A recently developed eco-design framework aimed to fill this knowledge gap by using ecotoxicological tools that allow the assessment of potential hazards posed by ENMs to natural ecosystems and wildlife. In the present review, we illustrate the development of the eco-design framework and review the application of ecotoxicology as a valuable strategy to develop ecosafe ENMs for environmental remediation. Furthermore, we critically describe the currently available ENMs for marine environment remediation and discuss their pros and cons in safe environmental applications together with the need to balance benefits and risks promoting an environmentally safe nanoremediation (ecosafe) for the future.

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Ultra-short-pulse laser ablation and modification of fully sprayed single walled carbon nanotube networks

Cited by 28 publications

References 43 publications

Advanced laser scanning for highly-efficient ablation and ultrafast surface structuring: experiment and model

Advanced laser scanning for highly-efficient ablation and ultrafast surface structuring: experiment and model

Rapid Selective Ablation and High-Precision Patterning for Micro-Thermoelectric Devices Using Femtosecond Laser Directing Writing

The Era of Nanomaterials: A Safe Solution or a Risk for Marine Environmental Pollution?

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