2019
DOI: 10.1088/1361-6439/ab025e
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Droplet-jet mode near-field electrospinning for controlled helix patterns with sub-10 µm coiling diameter

Abstract: This study presents a novel droplet-jet mode of near-field electrospinning which allows microscale control of helix patterns using nanofiber. While the cone-jet mode has been used to generate a printable nanofiber to date, the cone-jet mode requires a high applied voltage with a long jet travel distance to obtain the nanofiber, resulting in a large coiling diameter. In order to integrate the near-field electrospinning into microscale devices, it is important to achieve a comparable nanofiber pattern resolution… Show more

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Cited by 9 publications
(22 citation statements)
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“…A subset of EHD printing, electrospinning printers eject the fluid in a continuous stream, which is pulled toward the substrate in continuous fibers (Figure 2i). 100,181 Utilizing the charged state of the fluid, a balance between electrostatic force, surface tension, and viscous flow pull the fluid into a filament with a smaller diameter than the extruding nozzle 101,182. Based on the distance between the nozzle tip and substrate, electrospinning can be classified as either far‐field or near‐field.…”
Section: D Printing Methodsmentioning
confidence: 99%
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“…A subset of EHD printing, electrospinning printers eject the fluid in a continuous stream, which is pulled toward the substrate in continuous fibers (Figure 2i). 100,181 Utilizing the charged state of the fluid, a balance between electrostatic force, surface tension, and viscous flow pull the fluid into a filament with a smaller diameter than the extruding nozzle 101,182. Based on the distance between the nozzle tip and substrate, electrospinning can be classified as either far‐field or near‐field.…”
Section: D Printing Methodsmentioning
confidence: 99%
“…Based on the distance between the nozzle tip and substrate, electrospinning can be classified as either far‐field or near‐field. Far‐field electrospinning produces highly porous, disorderly mats whereas near‐field electrospinning can produce a controlled deposition of individual strands, reminiscent of the lines of filament produced by FDM or DIW55,100 This difference in morphology is due to the short distance over which near‐field fibers travel which limits the effect of bending instability from the interaction between the charged filament and electric field. Another subset of EHD printing, E‐jet printing, rapidly ejects individual droplets, with increasing droplet extrusion frequency at higher voltages 183.…”
Section: D Printing Methodsmentioning
confidence: 99%
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