Electrospinning onto Insulating Substrates by Controlling Surface Wettability and Humidity

Choi, Wonsuk; Kim, Geon Hwee; Shin, Jung Hwal; Lim, Geunbae; An, Taechang

doi:10.1186/s11671-017-2380-6

Cited by 12 publications

(11 citation statements)

References 19 publications

(15 reference statements)

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“…The elastic moduli of an infectious prion fibril formed based on a left-handed β-helix and a non-prion fibril constructed based on a right-handed β-helical structure are measured as ~ 18 GPa and ~ 13 GPa, respectively. However, it is interestingly found that the fracture toughness of an infectious prion fibril is smaller than that of non-prion fibril [147], which is consistent a recent finding [135] that infectious prion fibril is more fragile. A previous study by Buehler and colleagues [148] has interestingly investigated the relationship between the molecular structure of amyloid fibrils and their mechanical (e.g.…”

Section: Mechanical Properties Of Amyloid Materialssupporting

confidence: 86%

“…On the other hand, for a long fibril, the hydrogen bonds between β-sheets are fractured one-by-one, which results in the mechanical fragility of the long fibril. In recent years, we have investigated the fracture mechanisms of a helical prion fibril using all-atom SMD simulations [147]. The elastic moduli of an infectious prion fibril formed based on a left-handed β-helix and a non-prion fibril constructed based on a right-handed β-helical structure are measured as ~ 18 GPa and ~ 13 GPa, respectively.…”

Section: Mechanical Properties Of Amyloid Materialsmentioning

confidence: 99%

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Computer Simulation of Protein Materials at Multiple Length Scales: From Single Proteins to Protein Assemblies

Eom

2019

Multiscale Sci. Eng.

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Computer simulation of protein materials and their dynamic or mechanical behavior is of high significance, as proteins perform their functions through their structural changes in response to a force (or stimulus). The computer simulation enables the detailed insight into the structure and behavior of proteins at atomistic resolution, which is inaccessible with experimental toolkits such as single-molecule experiments. With the advancement of computing resources, the computer simulation has recently played a vital role as a virtual microscopy in understanding and characterizing the structure and behaviors of protein materials at atomistic resolution. For examples, computer simulations allow for gaining insight into how some protein domains can exhibit the remarkable mechanical properties and functions. In this article, we would like to address the current state-of-arts of computer simulations that have been employed for studying the structure and properties (or behaviors) of proteins at multiple length scales ranging from single proteins to protein assemblies. Specifically, we summarize various computational modeling techniques, ranging from atomistic models to coarse-grained models and continuum models, applicable for modeling protein structures at multiple length scales from single proteins to protein assemblies. This paper discusses how such various computational modeling/simulation techniques can be employed for studying the structure and properties of protein materials at multiple length scales. This paper sheds light on computer simulations, which are able to unveil the hidden, complex mechanisms related to the structure and properties of protein materials at multiple length scales.

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Section: Mechanical Properties Of Amyloid Materialssupporting

confidence: 86%

Section: Mechanical Properties Of Amyloid Materialsmentioning

confidence: 99%

Computer Simulation of Protein Materials at Multiple Length Scales: From Single Proteins to Protein Assemblies

Eom

2019

Multiscale Sci. Eng.

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“…The charges remaining on the top surface of the deposited mat induce a force repulsing the incoming jet and preventing the efficient production of the non-woven mat. However, Choi et al [156] have shown that the control of humidity at the vicinity of the collector can be advantageously exploited in order to insure the deposition of electrospun fibers onto hydrophilic insulating substrates. Indeed, whereas no efficient electrospinning is experienced when a hydrophobic acrylic collector is used, the authors observed that the fibers are efficiently deposited when the collector is subjected to oxygen plasma treatment prior to electrospinning.…”

Section: Electrospinning Onto Insulating Hydrophilic Wet Surfacesmentioning

confidence: 99%

A Review on the Impact of Humidity during Electrospinning: From the Nanofiber Structure Engineering to the Applications

Mailley

Hébraud

Schlatter

2021

Macro Materials & Eng

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Electrospinning is the process of choice for the elaboration of nanofibrous mats. During the process, a thin and continuous charged jet of a polymer solution is travelling from an emitter subjected to a high voltage towards a grounded collector.Although the duration of the jet travel is in the order of few tens of milliseconds, the physical interactions acting between the jet and the air play a key role on the resulting fiber morphology. These interactions mainly rely on the amount of water molecules in air. This review deals with the effect of humidity during electrospinning on solvent evaporation, the solidification rate of nanofibers and finally, on the morphology at length scales ranging from the non-woven mat, the nanofiber itself down to the polymer crystal.Original electrospinning processes operating under specific environmental conditions as well as the specificities encountered in needleless and free-surface electrospinning dedicated to industrial scale mass production are also discussed. Then, it is shown how the control of humidity during electrospinning and the understanding of its influence on the fibrous structure can be exploited to target various applications dedicated to energy, environment and health. Finally, current challenges and ideas for future research and new developments are presented.

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“…It was shown that the insulating substrate could be polarized upon the application of a strong external electric field that could affect the distribution of the intrinsic electric field. Furthermore, adsorbed water molecules 21 or functional electrolyte patterns 22 on insulating substrates or electrolyte solutions 23 could serve as conducting collector electrodes that allow the deposition of electrospun fibers. Luo et al 24 used printing paper as a collecting substrate, whereby the residual solvent from the deposited fibers could wet the paper and thus connect to the grounded plate.…”

mentioning

confidence: 99%

Near-Field Electrospinning for Three-Dimensional Stacked Nanoarchitectures with High Aspect Ratios

Park

Kim

et al. 2019

Nano Lett.

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Near-field electrospinning (NFES) was developed to overcome the intrinsic instability of traditional electrospinning processes and to facilitate the controllable deposition of nanofibers under a reduced electric field. This technique offers a straightforward and versatile method for the precision patterning of two-dimensional (2D) nanofibers. However, three-dimensional (3D) stacked structures built by NFES have been limited to either micron-scale sizes or special shapes. Herein, we report on a direct-write 3D NFES technique to construct self-aligned, template-free, 3D stacked nanoarchitectures by simply adding salt to the polymer solution. Numerical simulations suggested that the electric field could be tuned to achieve self-aligned nanofibers by adjusting the conductivity of the polymer solution. This was confirmed experimentally by using poly(ethylene oxide) (PEO) solutions containing 0.1−1.0 wt% NaCl. Using 0.1 wt% NaCl, nanowalls with a maximum of 80 layers could be built with a width of 92 ± 3 nm, height of 6.6 ± 0.1 μm, and aspect ratio (height/width) of 72. We demonstrate the 3D printing of nanoskyscrapers with various designs, such as curved "nanowall arrays", nano "jungle gyms," and "nanobridges". Further, we present an application of the 3D stacked nanofiber arrays by preparing transparent and flexible polydimethylsiloxane films embedded with Ag-sputtered nanowalls as 3D nanoelectrodes. The conductivity of the nanoelectrodes can be precisely tuned by adjusting the number of 3D printed layers, without sacrificing transmittance (98.5%). The current NFES approach provides a simple, reliable route to build 3D stacked nanoarchitectures with high-aspect ratios for potential application in smart materials, energy devices, and biomedical applications.

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Electrospinning onto Insulating Substrates by Controlling Surface Wettability and Humidity

Cited by 12 publications

References 19 publications

Computer Simulation of Protein Materials at Multiple Length Scales: From Single Proteins to Protein Assemblies

Computer Simulation of Protein Materials at Multiple Length Scales: From Single Proteins to Protein Assemblies

A Review on the Impact of Humidity during Electrospinning: From the Nanofiber Structure Engineering to the Applications

Near-Field Electrospinning for Three-Dimensional Stacked Nanoarchitectures with High Aspect Ratios

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