Electrohydrodynamic Direct-Writing for Flexible Electronic Manufacturing

Yin, Zhouping; Huang, Y S; Duan, Yongqing; Zhang, Haitao

doi:10.1007/978-981-10-4759-6

Cited by 27 publications

(35 citation statements)

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“…1a). Such electrohydrodynamic (EHD) jetting strategy is uniquely suited for high resolution 3D printing compared to other nozzle-based 3D printing methods [19][20][21][22][23][24] . EHD jetting allows printing submicrometer features with no risk of nozzle clogging, as it enables the generation of nanometer-sized jets from wide nozzle apertures using a great variety of inks, with viscosities ranging over several orders of magnitude 25 .…”

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confidence: 99%

“…These unmatched speeds result in uncontrolled jet buckling onto the substrate, degrading the quality of the printed pattern. Whereas buckling has been used to print simple cycloid and wavy patterns along straight lines 21 , the minimum radius of curvature that can be printed without buckling is limited to around 0.5 mm when using high speed electrified jets (>0.1 m s −1 ).…”

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Ultrafast 3D printing with submicrometer features using electrostatic jet deflection

2020

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Additive manufacturing technologies based on layer-by-layer deposition of material ejected from a nozzle provide unmatched versatility but are limited in terms of printing speed and resolution. Electrohydrodynamic jetting uniquely allows generating submicrometer jets that can reach speeds above 1 m s −1 , but such jets cannot be precisely collected by too slow mechanical stages. Here, we demonstrate that controlling the voltage applied to electrodes located around the jet, its trajectory can be continuously adjusted with lateral accelerations up to 10 6 m s −2. Through electrostatically deflecting the jet, 3D objects with submicrometer features can be printed by stacking nanofibers on top of each other at layer-by-layer frequencies as high as 2000 Hz. The fast jet speed and large layer-by-layer frequencies achieved translate into printing speeds up to 0.5 m s −1 in-plane and 0.4 mm s −1 in the vertical direction, three to four orders of magnitude faster than techniques providing equivalent feature sizes.

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Ultrafast 3D printing with submicrometer features using electrostatic jet deflection

2020

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“…Schematic of (a) conventional inkjet printing (b) EHD printing and (c) the liquid meniscus at the nozzle tip and the evolution of the shape of a Taylor cone during the EHD printing (Yin, et al, 2018) Fig. 9.…”

Section: Figmentioning

confidence: 99%

“…When the critical potential is reached, the repulsive electrical forces overcome the surface tension forces, and the liquid cone is distorted into a Taylor cone which forms the liquid jet. Emerging from the capillary, the jet is maintained at a high potential and can be disintegrated into droplets in various modes, depending on the applied voltage and the flow rate of the ink (Yin, et al, 2018). Figure 9 (a) -(c) shows an example of EHD printing combined with a lithography process to pattern nanowires for fabricating a shadow mask for large-scale flexible electronics applications.…”

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Plasma-digital nexus: plasma nanotechnology for the digital manufacturing age

Hong

Murphy

Ashford

et al. 2020

Rev. Mod. Plasma Phys.

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Digital transformation in manufacturing is one of the key megatrends in the development of global economy and society. Three-dimensional (3D) printing is a transformative digital technology poised to disrupt manufacturing and supply chains across major industries. Here we critically examine relevant insights into current and emerging applications of plasma nanotechnology in printing, including 3D printing. Plasma devices operated at atmospheric pressure coupled with printing processes may help strengthen 3D printing as an emerging fabrication technology that morphs diverse metal powders, polymers, plastics and other materials into digitally designed 3D shapes and patterns. We discuss how plasma applications may help overcome current limitations of 3D printing in various fields, e.g. limitations of sculpting composite materials, lack of mechanical strength and the need for postprocessing. Our key focus is on the challenges, opportunities and physical mechanisms of the use of 3D printing in nano-manufacturing, defined as the fabrication of nanoscale building blocks, such as nanoparticles and nanomaterials; their assembly into higher-order (micro-scale) structures; and the integration of these structures into larger (macro-) scale devices and systems by controlling energy and matter at nanoscale. Moreover, we discuss the physico-chemical mechanisms that result in highlyconformal deposition of nanostructured materials onto 3D surfaces with microscopic (and possibly nanoscale) control of textures and inter-layer cross-linking, without the need for additional heating. We further highlight the arising opportunities for plasma nanotechnology to synergize with the emerging digital transformation platforms in surface micro-and nano-structuring using polymers, metals, metallic alloys, and other materials. These new findings in plasma-digital nanoscale fabrication may lead to a new digital manufacturing platform suitable for a number of cutting-edge applications in electronic, sensing and energy devices.

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