Electrospray: More than just an ionization source

Týčová, Anna; Přikryl, Jan; Kotzianová, Adéla; Datinská, Vladimíra; Velebný, Vladimı́r; Foret, František

doi:10.1002/elps.202000191

Cited by 25 publications

(19 citation statements)

References 241 publications

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“…BES does not influence cell viability, which has been verified on cell lines such as sperm or stem cells [101][102][103][104][105]. This methodology has been proven to be a useful tool for cell encapsulation, the controlled deposition of cells on planar surfaces, drug delivery, and immunotherapy [102,106].…”

Section: Cell-electrospinning (Ce) and Bio-electrospraying (Bes)mentioning

confidence: 83%

“…Electrospinning and electrospraying techniques have shown great processability using both naturally and synthetically derived polymers. Synthetic polymers such as poly(dimethylsiloxane), polycaprolactone, or polylactic acid have been widely used for electrospinning and electrospray because of their versatility in the selection of the solvent that can provide adequate viscosity, conductivity, and surface tension of the polymer solution [91,106,107]. However, viability of encapsulated cells is highly affected by the use of the organic solvents commonly used, such as tetrahydrofuran, acetone, or chloroform [108].…”

Section: Naturally Derived Polymers For Ce and Besmentioning

confidence: 99%

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Emerging Biofabrication Techniques: A Review on Natural Polymers for Biomedical Applications

2021

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Natural polymers have been widely used for biomedical applications in recent decades. They offer the advantages of resembling the extracellular matrix of native tissues and retaining biochemical cues and properties necessary to enhance their biocompatibility, so they usually improve the cellular attachment and behavior and avoid immunological reactions. Moreover, they offer a rapid degradability through natural enzymatic or chemical processes. However, natural polymers present poor mechanical strength, which frequently makes the manipulation processes difficult. Recent advances in biofabrication, 3D printing, microfluidics, and cell-electrospinning allow the manufacturing of complex natural polymer matrixes with biophysical and structural properties similar to those of the extracellular matrix. In addition, these techniques offer the possibility of incorporating different cell lines into the fabrication process, a revolutionary strategy broadly explored in recent years to produce cell-laden scaffolds that can better mimic the properties of functional tissues. In this review, the use of 3D printing, microfluidics, and electrospinning approaches has been extensively investigated for the biofabrication of naturally derived polymer scaffolds with encapsulated cells intended for biomedical applications (e.g., cell therapies, bone and dental grafts, cardiovascular or musculoskeletal tissue regeneration, and wound healing).

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Section: Cell-electrospinning (Ce) and Bio-electrospraying (Bes)mentioning

confidence: 83%

Section: Naturally Derived Polymers For Ce and Besmentioning

confidence: 99%

Emerging Biofabrication Techniques: A Review on Natural Polymers for Biomedical Applications

2021

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“…The process of airbrushing and its variant, electrostatic spray deposition (ESD), involves the creation of a fine stream of droplets using air pressure and/or high voltage discharge which is directed onto a substrate [131]. The equipment used for airbrushing is widely available, low cost and the process can be performed at room temperature but more complex and expensive setups are used for various electrospray methods [132]. The simplest methods involve the retrofitting of a standard FFF printer technology to allow for the directing and triggering of the airbrushing system.…”

Section: ) Airbrushingmentioning

confidence: 99%

“…The materials which have been applied using airbrushing include metal nanoparticles such as aluminum and polymer materials. The airbrushing process easily allows for the control of the localized thickness and uniformity of the printed film [132]. The major limit to the application of air brushing is the ability to create fine detailed patterns.…”

Section: ) Airbrushingmentioning

confidence: 99%

A Survey of 3D Printing Technologies as Applied to Printed Electronics

Persad

Rocke

2022

IEEE Access

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3D printing technologies (3DP) leverage the benefits of additive manufacturing across many areas including electronics, food, medicine and optics. These technologies allow varying materials to be precision deposited, forming structures ranging from simple to complex composites such as organs and satellites. One important application for 3DP is printed electronics which is expected to exceed USD10 billion in market value by 2030. However, while considerable work has been reported in areas including inter alia: mechanical, thermal and multiple aspects, there has been less emphasis on the critical electromagnetic (EM) domain. In the EM domain, related work for 3DP encompasses interrelated EM studies of materials, processes and built structures and examines material characteristics including permittivity, permeability, electrical conductivity, which are foundational to 3D printed electronics design and fabrication. This paper presents a comprehensive report of 3DP technologies as applied to EM research & development (R&D) and end applications in order to inspire exploratory work in related areas by providing sufficient breadth for newcomers and depth for experts. The paper contributions include: summarization of the major R&D and applications areas for 3DP, thereby quantifying the prevalence of EM related work; examination of mainstream 3DP technologies applied to EM related R&D and end applications based on their materials, technology highlights and known issues; examination of relevant research which incorporates traditional printing, proprietary methods and composite 3DP methods; and classification of 3DP built EM structures as reported by research teams. Finally, the key challenges and opportunities for future research are identified and discussed.

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“…An alternative additive method for creating thin material films is using electrospray printing. , In an electrospray, high electric potentials are used to generate a spray of a precursor solution which is directed towards a target substrate. Under the action of the electric field, the meniscus at the printer emitting orifice deforms into a Taylor cone and a liquid jet is ejected from the apex.…”

Section: Introductionmentioning

confidence: 99%

Electrospray Printing of Polyimide Films Using Passive Material Focusing

Kingsley

Pawliczak

Hurley

et al. 2021

ACS Appl. Polym. Mater.

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In electrospray printing, a high electric potential is used to atomize a liquid solution containing the print material into a spray of charged microdroplets. Rapid solvent evaporation from the droplets renders a spray of charged dry particles that are directed onto a target substrate to print a film. Here, we report on electrospray printing of polyimide, an important polymer in electronics manufacturing, aerospace, and environmental applications. Using a passive electrostatic funnel to focus the print material, films were printed with thicknesses of more than 15 μm. However, the use of the funnel resulted in a significant amount of material deflected away from the target. The separation distance from the emitter to the target substrate was a key print parameter, resulting in different rates of film growth at different distances. The film growth was asymptotic, leading to self-limiting thickness due to the accumulation of electric charge in the film. The functionality of the printed films was evaluated by measuring their wettability and dielectric strength. The films maintained consistent surface wettability for a range of print conditions and film thicknesses. Weibull reliability analysis was performed for characterizing the dielectric strength of the printed films. The thickest films could sustain the highest applied potentials, exceeding 1 kV; however, the probability of breakdown increased with increasing electric field strength. As a result, thinner films had a greater breakdown electric field strength of ∼142 V/μm.

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Electrospray: More than just an ionization source

Cited by 25 publications

References 241 publications

Emerging Biofabrication Techniques: A Review on Natural Polymers for Biomedical Applications

Emerging Biofabrication Techniques: A Review on Natural Polymers for Biomedical Applications

A Survey of 3D Printing Technologies as Applied to Printed Electronics

Electrospray Printing of Polyimide Films Using Passive Material Focusing

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