Electrohydrodynamic printing under applied pole-type nozzle configuration

Xu, Lei; Sun, Di

doi:10.1063/1.4775672

Cited by 17 publications

(7 citation statements)

References 14 publications

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“…Pattern nanofibers via NFES have been applied in many fields, such as nanogenerator [10] and nanochannel [11]. Based on NFES theory, straight stable charged jet can be also utilized to directwrite nanofiber [12], micro thin film [13] and micro/nano droplet [14]. The controllable deposition of electrostatic ejected micro/nano structure, which has open up new application fields for charged jet printing technology, such as flexible electronics [10], micro/nano sensor [15], and miniature optoelectronic devices [16].…”

Section: Introductionmentioning

confidence: 99%

Pattern stretchable micro-nano thin film via Electrohydrodynamic Direct-Writing

Wei

Zheng

et al. 2013

2013 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale

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In this paper, mechanical stretching force is introduced into the Electrohydrodynamic Direct-Write (EDW) process. The effects of mechanical stretching on the rheology and deposition behaviors of EDW jet were investigated. The stretching affects that stemmed from the EDW motion platform provided an extra force on the charged jet. The larger stretching force applied on the jet played a good role to overcome bending instability, and stretch the jet into finer ones. Since the short distance between spinneret and collector, the mechanical stretching force acted more important role on the jet formation process. Thanks to the stretching effect, the whipping of charged jet can be avoided and micro/nano thin film without curve structure can be direct-written on the collector. With increasing collector motion velocity, the line width and thickness of micro/nano thin film will be decreased. During the EDW process, the mechanical stretching force had provided an excellent aspect to control the morphology and deposition pattern of EDWed micro/nano thin film.

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Section: Introductionmentioning

confidence: 99%

Pattern stretchable micro-nano thin film via Electrohydrodynamic Direct-Writing

Wei

Zheng

et al. 2013

2013 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale

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“…The primary droplet is large and undesired as its diameter is usually several orders of magnitude higher than that of electrospun nanofibres. Nevertheless, it might also play an important role in pulsated electrohydrodynamic printing [23].…”

Section: Introductionmentioning

confidence: 99%

Initial Jet Before the Onset of Effective Electrospinning of Polymeric Nanofibers

Xu¹,

Han²,

Zheng³

et al. 2015

TOMEJ

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Initial jet usually has a large primary droplet hanging at flying end before the onset of effective electrospinning. The primary droplet is undesired as its diameter is several orders of magnitude higher than that of electrospun nanofibres. A new method is used to derive micro-scaled initial jet and fine primary droplet under applied small-aperture needle by utilizing low solution flow rate and pre-applied electric potential before the extrusion of polymeric solution out of the needle. Small-aperture needle reduces the base of conical pendant, while low solution flow rate prevents a fluidic inrush into conical pendant. The pre-applied electric potential preforms a miniature liquid cone, as an origin of initial jet, within the needle. The conic preformation reduces the formation time of Taylor cone in order to escape from a swollen Taylor cone under a continuous inflow of polymeric solution. The miniature conical pendant grows so acute that it emits fine primary droplet rapidly from its tip with accumulated ions. Carrying primary droplet, thin initial jet experiences axial elongation and circumferential rotation in the space.

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“…[16,17] In the EDW process, the stable straight jet is utilized to directly write micro/nano structures precisely. By shortening the distance from the spinneret to the collector, [18][19][20] the instability and whipping of the charged jet in EHD printing is overcome. The charged jet is ejected from the tip of the Taylor cone, so the diameter of the jet is not limited by the inner diameter of the spinneret.…”

Section: Introductionmentioning

confidence: 99%