Electrically Forced Coaxial Nanojets for One-Step Hollow Nanofiber Design

Loscertales, Ignacio G.; Barrero, Antonio; Márquez, Manuel; Spretz, Ruben; Velarde-Ortiz, Raffet; Larsen, Gustavo

doi:10.1021/ja049443j

Cited by 317 publications

(202 citation statements)

References 27 publications

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“…Non-electrospinnable materials, such as low molecular weight or conjugated polymers with limited solubility, can be fabricated into fibers via formation as the fiber core and subsequent removal of the shell [24,[97][98][99][100]. Core-shell fibers are traditionally made by electrospinning of the core material, which serves as a template for the deposition of the shell layer via chemical vapor, plasma or solution deposition, or through use of a co-annular needle [101][102][103].…”

Section: Core Shell Fibersmentioning

confidence: 99%

“…Rather than a continuous core-shell structure as generated by certain emulsion solutions, the fibers contained microencapsulated aqueous domains containing the protein in the surrounding EVA fibers [115]. A wide variety of core-shell fibers have been generated, including PCL/gelatin, the conjugated polymer polyhexylthiophene with a polypyrrolidone sheath, fibers with various encapsulated live cells, and hollow ceramic fibers using oil as the core [98,102,103,116,117].…”

Section: Core Shell Fibersmentioning

confidence: 99%

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Hierarchically Structured Electrospun Fibers

Zander

2013

Polymers

130

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Abstract:Traditional electrospun nanofibers have a myriad of applications ranging from scaffolds for tissue engineering to components of biosensors and energy harvesting devices. The generally smooth one-dimensional structure of the fibers has stood as a limitation to several interesting novel applications. Control of fiber diameter, porosity and collector geometry will be briefly discussed, as will more traditional methods for controlling fiber morphology and fiber mat architecture. The remainder of the review will focus on new techniques to prepare hierarchically structured fibers. Fibers with hierarchical primary structures-including helical, buckled, and beads-on-a-string fibers, as well as fibers with secondary structures, such as nanopores, nanopillars, nanorods, and internally structured fibers and their applications-will be discussed. These new materials with helical/buckled morphology are expected to possess unique optical and mechanical properties with possible applications for negative refractive index materials, highly stretchable/high-tensile-strength materials, and components in microelectromechanical devices. Core-shell type fibers enable a much wider variety of materials to be electrospun and are expected to be widely applied in the sensing, drug delivery/controlled release fields, and in the encapsulation of live cells for biological applications. Materials with a hierarchical secondary structure are expected to provide new superhydrophobic and self-cleaning materials.

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Section: Core Shell Fibersmentioning

confidence: 99%

Section: Core Shell Fibersmentioning

confidence: 99%

Hierarchically Structured Electrospun Fibers

Zander

2013

Polymers

130

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“…In this sense, electrospinning is a simple technique that has been used to obtain polymer and carbon fibers and tubes in the submicro-and nanoscale [6][7][8][9][10][11], in which a solution held in a capillary tube by its surface tension is subjected to an electric field that stretches the electrified jet due to the electrostatic repulsions between the surface charges and the evaporation of the solvent. The action of the electric field over a drop, forming at the tip of a capillary, changes its shape into a charged conical meniscus known as the Taylor cone [9].…”

Section: Introductionmentioning

confidence: 99%

Electrospinning of silica sub-microtubes mats with platinum nanoparticles for NO catalytic reduction

Ruiz-Rosas¹,

Rosas²,

Loscertales³

et al. 2014

Applied Catalysis B: Environmental

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Silica sub-microtubes loaded with platinum nanoparticles have been prepared in flexible non-woven mats using co-axial electrosppining technique. A partially gelated sol made from tetraethyl orthosilicate was used as the silica precursor, and oil was used as the sacrificial template for the hollow channel generation. Platinum has been supported on the wall of the tubes just adding the metallic precursor to the sol-gel, thus obtaining the supported catalyst by one-pot method. The silica tubes have a high aspect ratio with external/internal diameters of 400/200 nm and well-dispersed platinum nanoparticles of around 2 nm. This catalyst showed a high NO conversion with very high selectivity to N 2 at mild conditions in the presence of excess oxygen when using C 3 H 6 as reducing agent. This relevant result reveals the potential of this technique to produce nanostructured catalysts onto easy to handle conformations.Keywords: coaxial electrospinning, silica nanotubes, platinum nanoparticles, NOx SCR. Graphical AbstractHighlights  Non-woven mats of platinum-loaded silica nanotubes were obtained by co-axial electrospinning in one-pot procedure. By this technique, high dispersed Pt nanoparticles can be easily deposited on the walls of the silica nanotubes. Pt-loaded silica nanotube non-woven mats show high activity for low temperature NOx SCR with propylene in the presence of excess oxygen and outstanding N 2 selectivity, at the studied operation conditions.

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“…[15][16][17][18][19][20] Electrospinning is also an expandable technique, by which one can easily fabricate one-dimensional (1D) nanostructures with controllable diameters, compositions, and morphologies on an industrial scale. [21][22][23][24][25][26][27] In addition to the extensive controllability, its simplicity and cost-effectiveness, along with environmental-friendliness, make it a very promising methodology. The unique structural features such as the high surface area-to-volume ratio, extremely long length, and complex porous structure of the electrospun nanofibers make them suitable for various applications, especially for lithium rechargeable batteries.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembly-Induced Formation of High-Density Silicon Oxide Memristor Nanostructures on Graphene and Metal Electrodes

et al. 2012

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We report on the synthesis of one-dimensional (1D) Li 4 Ti 5 O 12 nanofibers through electrospinning and their outstanding electrochemical performances. Li 4 Ti 5 O 12 with a spinel structure is a promising candidate anode material for lithium rechargeable batteries due to its well-known zerostrain merits. In order to improve the electronic properties of spinel Li 4 Ti 5 O 12 , which are intrinsically poor, we processed the material into a nanofiber type of architecture to shorten the Li + and electron transport distance using a versatile electrospinning approach. The electrospun Li 4 Ti 5 O 12 nanofiber showed significantly enhanced discharging/charging properties, even at high rates that exceeded 10 C, demonstrating that the nanofiber offers an attractive architecture for enhanced kinetics.

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Electrically Forced Coaxial Nanojets for One-Step Hollow Nanofiber Design

Cited by 317 publications

References 27 publications

Hierarchically Structured Electrospun Fibers

Hierarchically Structured Electrospun Fibers

Electrospinning of silica sub-microtubes mats with platinum nanoparticles for NO catalytic reduction

Self-Assembly-Induced Formation of High-Density Silicon Oxide Memristor Nanostructures on Graphene and Metal Electrodes

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