Electrolyte solution-assisted electrospray deposition for direct coating and patterning of polymeric nanoparticles on non-conductive surfaces

Lee, Seong Jin; Park, Sang Min; Han, Seon Jin

doi:10.1016/j.cej.2019.122318

Cited by 25 publications

(9 citation statements)

References 30 publications

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“…The EDGE process stably patterned the AgNW electrode with the minimum feature size of several hundreds of micrometers. We expected that the minimum feature size of the EDGE process would be reduced down to several tens of micrometers with the help of additional techniques, as demonstrated in the previous research of the electrolyte solution-based electrospray deposition process 60 . As an example, we fabricated a simple triangular pattern of an AgNW electrode and found that the tip of the triangular pattern could be down to 50 µm, as shown in Fig.…”

Section: Resultsmentioning

confidence: 95%

“…The major role of the masking tape is selectively positioning the electrolyte solution on the mask-uncovered hydrophilic region of the substrate. Due to the wettability difference between the plasma-treated target region of the substrate and the masking tape, the electrolyte solution was selectively positioned on the target region 60 . Plus, the masking tape prevents the deposition of AgNWs on the undesired region of the substrate.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the EDGE process could be utilized to various 3D surfaces by exploiting factors that can control surface tension, such as impurity and temperature, and factors that can control hydrostatic pressure, such as density and local gravity of a solution. Considering the broad compatibility with various 2D and 3D substrates, we believed that the EDGE process would be an efficient and effective way to produce a patterned 3D AgNW electrode for various applications 60 , 75 .

Figure 5 Patterned AgNW electrodes with a university emblem shape on the PMMA substrate ( a ), alphabet-matrix patterns on the PDMS substrate ( b ), and on the curved surface of the glass beaker ( c ).…”

Section: Resultsmentioning

confidence: 99%

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Highly efficient patterning technique for silver nanowire electrodes by electrospray deposition and its application to self-powered triboelectric tactile sensor

Song

Choi

et al. 2021

Sci Rep

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A patterned transparent electrode is a crucial component of state-of-the-art wearable devices and optoelectronic devices. However, most of the patterning methods using silver nanowires (AgNWs), which is one of the outstanding candidate materials for the transparent electrode, wasted a large amount of unused AgNWs during the patterning process. Here, we report a highly efficient patterning of AgNWs using electrospray deposition with grounded electrolyte solution (EDGE). During electrospray deposition, a patterned electrolyte solution collector attracted AgNWs by strong electrostatic attraction and selectively deposited them only on the patterned collector, minimizing AgNW deposited elsewhere. The enhanced patterning efficiency was verified through a comparison between the EDGE and conventional process by numerical simulation and experimental validation. As a result, despite the same electrospray deposition conditions for both cases except for the existence of the electrolyte solution collector, the coverage ratio of AgNWs fabricated by the EDGE process was at least six times higher than that of AgNWs produced by the conventional process. Furthermore, the EDGE process provided high design flexibility in terms of not only the material of the substrate, including a polymer and a ceramic but also the shape of the substrate, including a 2D flat and 3D curved surface. As an application of the EDGE process, a self-powered touch sensor exploiting the triboelectric effect was demonstrated. Thus, the EDGE process would be utilized in further application in wearable or implantable devices in the field of biomedicine, intelligent robots, and human–machine interface.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Highly efficient patterning technique for silver nanowire electrodes by electrospray deposition and its application to self-powered triboelectric tactile sensor

Song

Choi

et al. 2021

Sci Rep

Self Cite

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“…Such applications include electrospraying chitosan NPs 10 and collagen NPs 11 as drug delivery carriers 10,11 and spraying polycaprolactone NPs layers to control alignment and growth patterning for cell culture. 12 Collagen/calcium phosphate coatings onto metallic implants have been explored to encourage stronger chemical bonding between the implant and native bone tissue relative to metal to native tissue alone. 13 Bioglass composed of silicon dioxide, calcium oxide, and phosphorous pentoxide was used to coat metallic implants via ESD for similar purposes of promoting osseointegration of the implant.…”

Section: Introductionmentioning

confidence: 99%

Efficient electrospray deposition of surfaces smaller than the spray plume

Park

Liu

D'Souza

et al. 2022

Preprint

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Electrospray deposition (ESD) uses charged droplets at the micro- and nano-scale to create a wide variety of particles and coatings. In ESD, an electrostatic force is applied to a solution, which then disperses charged droplets loaded with the materials to be deposited on a grounded target. Because the droplets carry charge, repulsive effects due to accumulation of charge in a coating (self-limiting electrospray) or “crowding” of the spray droplets can reduce the efficiency of the approach. This is especially the case when the targets are smaller than the characteristic size of the spray plume. For this reason, while many studies have presumed high efficiency in ESD, the actual measured efficiencies for small targets are much lower. Here, it is shown how architecting the local “charge landscape” can lead to ESD coatings approaching 100% deposition efficiency on both flat and microneedle array targets composed of multiple model materials, including biocompatible polymers, proteins, and bioactive small molecules. In this way, ESD can be considered a viable alternative to other conformal approaches, such as dip or inkjet coating.

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“…Their characteristics to deliver the droplets to hidden surfaces of the objects, which is called the wraparound effect, result in full even coverage on hardly reaching surfaces [ [20] , [21] , [22] ]. The electrostatic nozzle application has been developed in numerous industrial applications including particle synthesis [ 23 ], micro-patterning [ 24 ], thin-film deposition [ 25 , 26 ], measurement device [ [27] , [28] , [29] ], oil burner [ 30 ], and agriculture [ [31] , [32] , [33] , [34] ] due to its unique characteristics. Although the characterization of droplet deposition pattern and droplet size distribution is essential for optimizing the disinfectant sprayer, to our best knowledge, there is no research conducted through quantitatively characterizing the electrostatic sprayer performance.…”

Section: Introductionmentioning

confidence: 99%

Quantitative analysis of droplet deposition produced by an electrostatic sprayer on a classroom table by using fluorescent tracer

Kwak

Kim

Kuehn

et al. 2021

Building and Environment

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Due to the ongoing COVID-19 pandemic situation, measures to mitigate the risk of transmission of the SARS-CoV-2 virus in an indoor setting are urgently needed. Among the various types of disinfectant methods, electrostatic spraying is often applied to decontamination in public places. For quantitatively characterizing electrostatic spraying, we developed the novel evaluation method by using a fluorescent tracer. By applying this method, we performed three different experiment cases (static test on a table, static test on a cylinder, and dynamic test on a table) to figure out its unique characteristics (Coulombic fission and wraparound effect) and measure its performance in various aspects. To be specific, bimodal distribution with peak sizes of ∼10 and ∼100 μm was found due to Coulombic fission. Otherwise, a unimodal distribution with a peak size of ∼100 μm occurred for the uncharged droplets. As a result, the effective contact area increased by 40–80 % due to small progeny droplets. The wraparound effect was examined on two different cylinders: copper (Cu) and polyvinyl chloride (PVC) pipe. When the target surface was not charged (Cu 0 kV and PVC 0 kV), the average normalized concentrations on the backside of the cylinder ( θ = 180°) increased by around 67 % for charged droplets. Meanwhile, when the target surface was highly charged (PVC –19 kV), the average normalized concentrations at θ = 180° were increased more than two times for charged droplets.

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Electrolyte solution-assisted electrospray deposition for direct coating and patterning of polymeric nanoparticles on non-conductive surfaces

Cited by 25 publications

References 30 publications

Highly efficient patterning technique for silver nanowire electrodes by electrospray deposition and its application to self-powered triboelectric tactile sensor

Highly efficient patterning technique for silver nanowire electrodes by electrospray deposition and its application to self-powered triboelectric tactile sensor

Efficient electrospray deposition of surfaces smaller than the spray plume

Quantitative analysis of droplet deposition produced by an electrostatic sprayer on a classroom table by using fluorescent tracer

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