Drop impact printing

Modak, Chandantaru Dey; Kumar, Arvind; Tripathy, Abinash; Sen, Prosenjit

doi:10.1038/s41467-020-18103-6

Cited by 104 publications

(71 citation statements)

References 47 publications

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“…Bartolo [13] was one of the first researchers to report on these phenomena with findings that impact of the droplet on a superhydrophobic surface was found to cause a jet that possessed an axial velocity up to 40 times greater than the impact velocity of the droplet on the substrate. This jetting and droplet emission initiated from droplet impact on the hydrophobic surface has also been observed on many other surfaces, such as hydrophilic substrates [4], natural surfaces [14], razor blades [15], liquid surfaces [16], and oblique hydrophobic substrates [17], and, more recently, discovered to occur on fine mesh [18].…”

Section: Introductionmentioning

confidence: 61%

Jet Dynamics Associated with Drop Impact on Micropillared Substrate

Asai

Siddique

Tan

2021

Fluids

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The jetting phenomenon associated with droplet impact upon a hydrophilic micropillared substrate was analyzed in detail using a high-speed camera. Viscosities of the fluids were varied using differing concentrations of glycerol in deionized water. This paper aims to connect similarities between this form of capillary jetting and another well-known jetting phenomenon from the bubble bursting. Both experience a cavity collapse when opposing fluid fronts collide which causes a singularity at the liquid surface, thus leading to the occurrence of jetting. Following processes used to define scaling laws for bubble bursting, a similar approach was taken to derive scaling laws for the dimensionless jet height, jet radius, base height, and radius of the jet base with respect to dimensionless time for the jetting phenomenon associated with the droplet impact. The development of a top droplet before the breakup of the jet also allows the examination of a scaling law for the necking diameter. We find that with the proper scaling factors, the evolution of the jet profile can collapse into a master profile for different fluids and impact velocities. The time dependence of the necking diameter before the jet breakup follows the power law with an exponent of ~2/3. Contrastingly, for other jet parameters such as the radius and height, the power law relationship with time dependence was not found to have a clear pattern that emerged from these studies.

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Section: Introductionmentioning

confidence: 61%

Jet Dynamics Associated with Drop Impact on Micropillared Substrate

Asai

Siddique

Tan

2021

Fluids

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“…Reference [15] proposed a DOD printing technique in which they replaced the nozzle with a sieve and dispensed a single satellite-free micrometer-sized droplet. The size of the jetted droplet was proportional to the pore size.…”

Section: H Drop Impact Printingmentioning

confidence: 99%

“…Several methods including needle-based printing [7], piezoelectric [8] and thermal [9] inkjet printing, electrohydrodynamic (EHD) jet printing [10], laser-based printing [11], aerosol jet printing (AJP) [12], surface acoustic-waves (SAW) printing [13], acoustophoretic printing [14], and drop impact printing [15] were demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Classifications and Applications of Inkjet Printing Technology: A Review

et al. 2021

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Inkjet printing technology uses the low-cost direct deposition manufacturing technique for printing and is applicable in various fields including optics, ceramics, three-dimensional printing in biomedicine, and conductive circuitry. This study reviews the classifications and applications of inkjet printing technologies, with a focus on recent publications. The different design approaches, applications, and research progress of several inkjet printing techniques are reviewed. Among them, the piezoelectric inkjet printing technology is the main focus owing to its reliability and handling of a diverse range of inks. A piezo-driven inkjet printhead is activated by applying a voltage waveform to a piezoelectric membrane. The waveform ensures the formation of the designed droplet and a stable jet. A survey of various drivingvoltage waveforms is conducted, which can serve as a reference to the research community that uses piezodriven inkjet printheads. The challenges of printing quality, stability, and speed and their solutions as published in recent studies are reviewed. Technologies for producing high-viscosity inkjets are explored, and the applications of inkjet printing technology in textile, displays, and wearable devices are discussed.

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“…Micro droplet deposition is also another modern technology that has broad usage for microelectronics, including biomedical engineering [3]. A recent study shows that drop impact printing is now widely accessible as it is significantly simple and cost-effective [4]. As these processes are centered around droplet impact behavior, studying the droplet impact dynamics is a necessity.…”

Section: Introductionmentioning

confidence: 99%

Inner Finger Formation During a Droplet Impact on Liquid Films

Ersoy¹,

Hung

Eslamian

2021

ICLASS

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A droplet hitting a thin liquid layer can cause different phenomena such as bouncing, splashing, fingering, etc. In this paper, these interactions are studied experimentally when a droplet impacts on different liquid film thicknesses that causes different impact regions. In the experiments, a colored water droplet is impinged on liquid films from different heights to create Weber numbers between 121 and 304. Also, different liquid film thicknesses are prepared to create various dimensionless film thickness h* between 0.4 to 1.6 mm. All of these processes are recorded with a color high-speed camera at a recoding rate of 2000 fps. The color contrast between the droplet and the colorless liquid film created a distinction in images and improved observation of details. The color contrast is especially used to analyze the finger formation. This process is studied both during the crown formation and after the crown disappears. As a novel contribution, a different type of fingering mechanism is identified. We number is found to be the main contributor of this finger formation. On the other hand, the dimensionless film thickness h* is mainly responsible for the formation of these fingers whether they will appear above or inside the crown.

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Drop impact printing

Cited by 104 publications

References 47 publications

Jet Dynamics Associated with Drop Impact on Micropillared Substrate

Jet Dynamics Associated with Drop Impact on Micropillared Substrate

Classifications and Applications of Inkjet Printing Technology: A Review

Inner Finger Formation During a Droplet Impact on Liquid Films

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