Comparison of jets from Newtonian and non-Newtonian fluids induced by blister-actuated laser-induced forward transfer (BA-LIFT)

Turkoz, Emre; Deike, Luc; Arnold, Craig B.

doi:10.1007/s00339-017-1252-3

Cited by 12 publications

(13 citation statements)

References 20 publications

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“…Previous work of our team, and other groups, has proved the necessity for the development of new inks, better suited for laser printing, with regard to their rheological properties but also their conductivity and sintering conditions. Contrary to commercially available conductive inks, which are optimized for inkjet printing (low viscosity values (3–15 cP) and low metal loadings), laser printing enables the use of more viscous inks with higher metal loading, yielding finer printing results, both in shape and functionality.…”

Section: Methodsmentioning

confidence: 99%

“…Most of the research in this field has been focused on reference inks, related mostly to biological applications, to study the role of non‐Newtonian behavior on the jet formation and evolution . Inspired by that work, the authors studied commercially available, conductive silver (Ag) nanoparticle (NP) inks and focused on the influence of their rheological properties on the jet behavior.…”

Section: Introductionmentioning

confidence: 99%

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Laser‐Induced Forward Transfer of High Viscous, Non‐Newtonian Silver Nanoparticle Inks: Jet Dynamics and Temporal Evolution of the Printed Droplet Study

et al. 2019

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Current technological trends in the field of microelectronics highlight the requirement to use cost-effective techniques for precise deposition of highly resolved features. Laser-induced forward transfer (LIFT) meets these requirements and is already applied for direct printing of electronic components. However, to improve the process' reproducibility and printing resolution, further research has to be conducted, regarding the rheological characteristics of the printable fluids and their jetting dynamics. Herein, a high-speed imaging setup is used to investigate the liquid jet's propagation during the printing process. Different Ag nanoparticle inks are studied and compared, over a wide range of viscosities and two different values of surface tension. The main focus of this investigation is the influence of the ink's rheological properties, both on the jet propagation and on the spatial and temporal evolution of the printed droplet during the wetting phase on three different receiver substrates (glass, SU-8, and gate dielectric). The results indicate that both the surface tension and the wetting properties of the receiver determine the shape of the printed droplet, whereas the inks' viscosity and laser fluence determine the printed volume.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Laser‐Induced Forward Transfer of High Viscous, Non‐Newtonian Silver Nanoparticle Inks: Jet Dynamics and Temporal Evolution of the Printed Droplet Study

et al. 2019

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“…Time‐resolved imaging has revealed that no cavitation bubble is generated in the liquid donor film during BA‐LIFT . The absorption of the laser pulse energy in the polymeric DRL results in the decomposition of the polymer into diverse gaseous species.…”

Section: Lift From Liquid Donor Filmsmentioning

confidence: 99%

Laser‐Induced Forward Transfer: Fundamentals and Applications

Serra

Piqué

2018

Adv Materials Technologies

256

191

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Laser‐induced forward transfer (LIFT) is a digital printing technique that uses a pulsed laser beam as the driving force to project material from a donor thin film toward the receiving substrate whereon that material will be finally deposited as a voxel. This working principle allows LIFT to operate with both solid and liquid donor films, which provides the technique with an unprecedented broad spectrum of printable materials, and thus makes it very competitive over other digital technologies, like inkjet printing. It is not only that LIFT can access a much wider range of ink viscosities and loading particle sizes; the possibility of printing from solid films allows the single‐step printing of multilayers and entire devices, and even makes possible 3D printing. This versatility translates, in turn, into a broad field of applications, from graphics production to printed electronics, from the fabrication of chemical sensors to tissue engineering. This monograph provides an extensive review of the LIFT technique, from its origins to the most recent achievements, focusing on the fundamental aspects of both its working principle and transfer dynamics, as well as on its broad range of applications.

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“…One of these regimes is the "no jetting" regime, where the supplied energy to the fluid is insufficient for jet formation. Figure 3a presents the jetting without breakup regime where the incident laser energy is high enough to initiate the jet formation, however it is insufficient for the jet go through pinch-off [27]. This limiting behavior is a consequence of a combination of the viscoelastic effects that result from the resistance of polymer chains to extension, and surface tension that resists the propagation of a filament due to the creation of new surface.…”

mentioning

confidence: 99%

Impulsively Induced Jets from Viscoelastic Films for High-Resolution Printing

et al. 2018

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Understanding jet formation from non-Newtonian fluids is important for improving the quality of various printing and dispensing techniques. Here, we use a laser-based nozzleless method to investigate impulsively formed jets of non-Newtonian fluids. Experiments with a time-resolved imaging setup demonstrate multiple regimes during jet formation that can result in zero, single, or multiple drops per laser pulse. These regimes depend on the ink thickness, ink rheology, and laser energy. For optimized printing, it is desirable to select parameters that result in a single-drop breakup; however, the strain-rate dependent rheology of these inks makes it challenging to determine these conditions a priori. Rather, we present a methodology for characterizing these regimes using dimensionless parameters evaluated from the process parameters and measured ink rheology that are obtained prior to printing and, so, offer a criterion for a single-drop breakup.

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Comparison of jets from Newtonian and non-Newtonian fluids induced by blister-actuated laser-induced forward transfer (BA-LIFT)

Cited by 12 publications

References 20 publications

Laser‐Induced Forward Transfer of High Viscous, Non‐Newtonian Silver Nanoparticle Inks: Jet Dynamics and Temporal Evolution of the Printed Droplet Study

Laser‐Induced Forward Transfer of High Viscous, Non‐Newtonian Silver Nanoparticle Inks: Jet Dynamics and Temporal Evolution of the Printed Droplet Study

Laser‐Induced Forward Transfer: Fundamentals and Applications

Impulsively Induced Jets from Viscoelastic Films for High-Resolution Printing

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