Infrared-Laser-Induced Thermocapillary Deformation and Destabilization of Thin Liquid Films on Moving Substrates

Wedershoven, Hmjm Ber; Berendsen, Cwj Christian; Zeegers, Jch Jos; Darhuber, Anton A.

doi:10.1103/physrevapplied.3.024005

Cited by 17 publications

(9 citation statements)

References 83 publications

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“…2 occur only with the impact of the ionization waves present and not with a helium gas flow alone, this could be an important aspect of the interaction. Lastly, the influence of infrared laser spots on liquid thin films has been studied in the past 29 , 30 , where it was shown that the occurrence, timing and velocity of dewetting and rupture of the film is influenced by the energy and spot size.…”

Section: Resultsmentioning

confidence: 99%

In-situ monitoring of an organic sample with electric field determination during cold plasma jet exposure

Slikboer

Sobota

García-Caurel

et al. 2020

Sci Rep

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Pockels-based Mueller polarimetry is presented as a novel diagnostic technique for studying time and space-resolved and in-situ the interaction between an organic sample (a layer of onion cells) and non-thermal atmospheric pressure plasma. The effect of plasma is complex, as it delivers electric field, radicals, (UV) radiation, non-uniform in time nor in space. This work shows for the first time that the plasma-surface interaction can be characterized through the induced electric field in an electrooptic crystal (birefringence caused by the Pockels effect) while at the same moment the surface evolution of the targeted sample is monitored (depolarization) which is attached to the crystal. As Mueller polarimetry allows for separate detection of depolarization and birefringence, it is possible to decouple the entangled effects of the plasma. In the sample three spatial regions are identified where the surface evolution of the sample differs. This directly relates to the spatial in-homogeneity of the plasma at the surface characterized through the detected electric field. The method can be applied in the future to investigate plasma-surface interactions for various targets ranging from bio-films, to catalytic surfaces and plastics/polymers.

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Section: Resultsmentioning

confidence: 99%

In-situ monitoring of an organic sample with electric field determination during cold plasma jet exposure

Slikboer

Sobota

García-Caurel

et al. 2020

Sci Rep

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“…Notably, an excessive decrease in the spot diameter with a constant laser power is inadvisable, because the increased energy input will reperform the writing process. The reintroduced Cu structure is easily oxidized into CuO because the liquid film rupture caused by the large-spot laser irradiation [ 40 ] will expose the structure to the atmosphere at high temperatures (detailed results and analysis of parametric study are in Section S4 of Supporting Information ) . This CuO also can act as the passive layer to slow down the corrosion [ 41 ], causing the erasing process is no longer applicable.…”

Section: Resultsmentioning

confidence: 99%

Laser Erasing and Rewriting of Flexible Copper Circuits

2021

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Integrating construction and reconstruction of highly conductive structures into one process is of great interest in developing and manufacturing of electronics, but it is quite challenging because these two involve contradictive additive and subtractive processes. In this work, we report an all-laser mask-less processing technology that integrates manufacturing, modifying, and restoring of highly conductive Cu structures. By traveling a focused laser, the Cu patterns can be fabricated on the flexible substrate, while these as-written patterns can be selectively erased by changing the laser to a defocused state. Subsequently, the fresh patterns with identical conductivity and stability can be rewritten by repeating the writing step. Further, this erasing–rewriting process is also capable of repairing failure patterns, such as oxidation and cracking. Owing to the high controllability of this writing–erasing–rewriting process and its excellent reproducibility for conductive structures, it opens a new avenue for rapid healing and prototyping of electronics.

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“…Below a threshold size, a pore punctuated or nucleated in a fluid sheet will contract driven by capillarity to decrease surface energy. The threshold size for capillary contraction is on the order of the thickness of the sheet. ,, As recently reviewed by Néel and Villermaux, these small pores can be nucleated in liquid films using a variety of techniques including penetrating the liquid film with a sharp object, a projectile, an air jet, a spark, a laser beam, and an electron beam; or by introducing bubbles, oil droplets, or hydrophobic particles in the plane of the film.…”

Section: Resultsmentioning

confidence: 99%

Contraction of Surfactant-Laden Pores

Campana

Corvalán

2018

Langmuir

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The contraction of surfactant-laden pores at the microscale has implications for natural and technological processes ranging from the collapse of channels in lipid membranes to the stability of foams in the food processing industry. Despite their prevalence, our understanding of the mechanisms of pore contraction in the presence of surfactants remains unclear. These mechanisms have been challenging to study experimentally given the small length scale near the singularity and simulations capable of accurately characterizing the pore dynamics may help enhance our understanding of the process. Here, we use high-fidelity numerical simulations to gain insight into the fluid dynamics and interfacial phenomena underlying the contraction of viscous pores in the presence of an insoluble surfactant. Results show that surfactants accumulate on the advancing front of a collapsing pore due to the uneven deformation of the pore interface. Because of this accumulation, even a small amount of surfactant plays a major role in the way in which a collapsing pore approaches the singularity.

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Infrared-Laser-Induced Thermocapillary Deformation and Destabilization of Thin Liquid Films on Moving Substrates

Cited by 17 publications

References 83 publications

In-situ monitoring of an organic sample with electric field determination during cold plasma jet exposure

In-situ monitoring of an organic sample with electric field determination during cold plasma jet exposure

Laser Erasing and Rewriting of Flexible Copper Circuits

Contraction of Surfactant-Laden Pores

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