Electrohydrodynamic printing of silver nanoparticles by using a focused nanocolloid jet

Lee, Dong Hoon; Shin, Yun Soo; Park, Sung Eun; Yu, Tiantang; Hwang, Jungho

doi:10.1063/1.2645078

Cited by 113 publications

(65 citation statements)

References 15 publications

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“…The conical menisci now are called Taylor cones (9), and the emission of fine jets from the tips of the cones is referred to as electrohydrodynamic (EHD) tipstreaming (10) or EHD cone-jetting (11). In the past few decades, it has become widely appreciated that the emission of charged jets from conical surfaces and the disintegration of such jets into aerosols of tiny charged droplets (electrospraying) are common to diverse but seemingly unrelated situations in technology and nature, including electrospray ionization mass spectrometry (ESI-MS) (12), raindrops in thunderclouds (13), and printing and coating processes (14).…”

mentioning

confidence: 99%

Universal scaling laws for the disintegration of electrified drops

Collins

Sambath

Harris

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

166

167

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Drops subjected to strong electric fields emit charged jets from their pointed tips. The disintegration of such jets into a spray consisting of charged droplets is common to electrospray ionization mass spectrometry, printing and coating processes, and raindrops in thunderclouds. Currently, there exist conflicting theories and measurements on the size and charge of these small electrospray droplets. We use theory and simulation to show that conductivity can be tuned to yield three scaling regimes for droplet radius and charge, a finding missed by previous studies. The amount of charge Q that electrospray droplets carry determines whether they are coulombically stable and charged below the Rayleigh limit of stability (Q R ) or are unstable and hence prone to further explosions once they are formed. Previous experiments reported droplet charge values ranging from 10% to in excess of Q R . Simulations unequivocally show that electrospray droplets are coulombically stable at the instant they are created and that there exists a universal scaling law for droplet charge, Q = 0:44 Q R .

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mentioning

confidence: 99%

Universal scaling laws for the disintegration of electrified drops

Collins

Sambath

Harris

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

166

167

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“…The patterning of wide ranging classes of inks in diverse geometries, as well as printed examples of functional circuits and sensors demonstrating the diverse applications of E-jet printing are provided in [24]. In addition to a wide ranging class of liquids, this process has been used to deposit suspensions containing particulates such as zirconia, DNA, and silver nanoparticles as demonstrated in [26][27][28]. Along with the ability to print electrical and biological sensors, these suspensions can be used to fabricate 3D structures without supporting material as demonstrated in [29].…”

Section: Emerging Manufacturing Technologymentioning

confidence: 99%

Precision coordination and motion control of multiple systems via iterative learning control

Barton

Alleyne

2010

Proceedings of the 2010 American Control Conference

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In today's engineering world, many emerging applications ranging from manufacturing to the autonomous vehicle industry require coordination of multiple systems. Traditional approaches for controlling these systems often neglect the underlying coupling in the application. To stay at the forefront of these fields requires the development of innovative approaches to new challenges. The research in this dissertation focuses on designing novel control strategies for coordinated applications. Electrohydrodynamic jet (E-jet) printing, an example of an emerging micro/nano-manufacturing process with applications in biotechnology and flexible electronics, requires multiple systems to work in a coordinated manner to achieve a desired objective. Repetitive execution of processes such as E-jet can be harnessed to achieve high performance. Iterative learning control (ILC) is an adaptive control technique for improving process performance in systems that execute a task repetitively. This research simultaneously exploits the repetitiveness and inherent coupling of the desired outcome by applying a coordinated ILC approach to processes such as E-jet. The versatility of this approach will be demonstrated through applications ranging from robotics to emerging manufacturing processes.ii To Alex and our little family iii

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“…86 In this way Lee et al were able to focus electrosprayed silver nanoparticles to write lines 100 µm wide and 100 nm thick with a deposition rate of 2 µL/min. 87 Electrospraying is a flexible deposition method that has been used for thin film deposition, direct writing, and nanoparticle fabrication within a variety of fields. Virtually all materials can be electrosprayed, which means that organic as well as inorganic thin films can be formed.…”

Section: Electrohydrodynamic Jet Printingmentioning

confidence: 99%