keyword
MENU ▼
Read by QxMD icon Read
search

Nanofibers

keyword
https://www.readbyqxmd.com/read/28926978/fabrication-of-magnetic-nanofibers-by-needleless-electrospinning-from-a-self-assembling-polymer-ferrofluid-cone-array
#1
Weilong Huang, Bin Liu, Zhipeng Chen, Hongjian Wang, Lei Ren, Jiaming Jiao, Lin Zhuang, Jie Luo, Lelun Jiang
Magnetic nanofiber has been widely applied in biomedical fields due to its distinctive size, morphology, and properties. We proposed a novel needleless electrospinning method to prepare magnetic nanofibers from the self-assembling "Taylor cones" of poly(vinyl pyrrolidone) (PVP)/Fe₃O₄ ferrofluid (PFF) under the coincident magnetic and electric fields. The results demonstrated that a static PFF Rosensweig instability with a conical protrusion could be obtained under the magnetic field. The tip of the protrusion emitted an electrospinning jet under the coincident magnetic and electric fields...
September 17, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28926694/self-powered-electrospinning-system-driven-by-triboelectric-nanogenerator
#2
Congju Li, Yingying Yin, Bin Wang, Tao Zhou, Jiaona Wang, Jianjun Luo, Wei Tang, Ran Cao, Zuqing Yuan, Nianwu Li, Xinyu Du, Chunru Wang, Shuyu Zhao, Yuebo Liu, Zhong Lin Wang
Broadening the application area of the triboelectric nanogenerators (TENGs) is one of the research emphases in the study of the TENGs, whose unique output characteristic is high voltage with low current. Here we design a self-powered electrospinning system, which is composed of a rotating-disk TENG (R-TENG), a voltage doubling rectifying circuit (VDRC) and a simple spinneret. The R-TENG can generate an alternating voltage up to 1400 V. By using a voltage doubling rectifying circuit, a maximum constant direct voltage of 8...
September 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/28925690/fiber-alignment-and-liquid-crystal-orientation-of-cellulose-nanocrystals-in-the-electrospun-nanofibrous-mats
#3
Weiguang Song, Dagang Liu, Nana Prempeh, Renjie Song
Sulfate cellulose nanocrystal (CNC) dispersions always present specific self-assembled cholesteric mesophases which is easily affected by the inherent properties of particle size, surface charge and repulsion or affinity interaction, and external field force generated from ionic potential of added electrolytes, magnetic, electric, and/or mechanical shearing or stretching. Aiming at understanding the liquid crystal orientation and fiber alignment under high-voltage electric field, randomly distributed, uniform-aligned, or core-sheath nanofibrous mats involving PVA and charged CNCs were electrospun; and amongst them, specific straight arrayed fine nanofibers wi...
September 19, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28922139/3d-printed-multiplexed-electrospinning-sources-for-large-scale-production-of-aligned-nanofiber-mats-with-small-diameter-spread
#4
Erika García-López, Daniel Olvera-Trejo, Luis F Velásquez-García
We report the design, fabrication, and characterization of novel, low-cost, and modular miniaturized nanofiber electrospinning sources for the scalable production of non-woven aligned nanofiber mats with low diameter variation. The devices are monolithic arrays of electrospinning emitters made via stereolithography; the emitters are arranged so each element has an independent line of sight to a rotating collector surface. Linear and zigzag emitter packing were evaluated using a PEO solution with the aim of maximizing the throughput of nanofibers with the smallest diameter and narrowest distribution...
September 18, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28921953/new-antimony-selenide-nickel-oxide-photocathode-boosts-the-efficiency-of-graphene-quantum-dots-co-sensitized-solar-cell
#5
Ankita Kolay, Ramesh K Kokal, Ankarao Kalluri, Isaac Macwan, Prabir K Patra, Partha Ghosal, Melepurath Deepa
A novel assembly of a photocathode and photoanode is investigated to explore their complementary effects in enhancing the photovoltaic performance of a quantum dot solar cell (QDSC). While p-type nickel oxide (NiO) has been used previously, antimony selenide (Sb2Se3) has not been used in a QDSC, especially as a component of a counter electrode (CE) architecture that doubles up as the photocathode. Here, near infrared (NIR) light absorbing Sb2Se3 nanoparticles (NPs) coated over electrodeposited NiO nanofibers on a carbon (C)-fabric substrate was employed as the highly efficient photocathode...
September 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28920442/novelty-of-dynamic-process-in-the-synthesis-of-biocompatible-silica-nanotubes-by-biomimetic-glycyldodecylamide-as-a-soft-template
#6
Hyejung Choi, Joong-Jo Kim, Yong-Hwan Mo, Benjaram Mahipal Reddy
Dynamic process in the synthesis of silica nanotubes (SNTs) by utilizing glycyldodecylamide (GDA) as a soft template was thoroughly investigated. The morphological evolution from GDA to SNTs was deeply explored to elucidate the formation mechanism for optimizing the synthesis procedure. Various analytical tools, namely, XRD, FTIR, SEM, TEM, Z-potential, and N2 adsorption/desorption isotherms were employed during the synthesis procedure. The interactive structure of GDA was also investigated using TEM-EDX as a function of aging time...
September 18, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28919738/surface-modification-of-endovascular-stents-with-rosuvastatin-and-heparin-loaded-biodegradable-nanofibers-by-electrospinning
#7
Milka Janjic, Foteini Pappa, Varvara Karagkiozaki, Christakis Gitas, Kiriakos Ktenidis, Stergios Logothetidis
This study describes the development of drug-loaded nanofibrous scaffolds as a nanocoating for endovascular stents for the local and sustained delivery of rosuvastatin (Ros) and heparin (Hep) to injured artery walls after endovascular procedures via the electrospinning process. PURPOSE: The proposed hybrid covered stents can promote re-endothelialization; improve endothelial function; reduce inflammatory reaction; inhibit neointimal hyperplasia of the injured artery wall, due to well-known pleiotropic actions of Ros; and prevent adverse events such as in-stent restenosis (ISR) and stent thrombosis (ST), through the antithrombotic action of Hep...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28917987/development-and-characterisation-of-electrospun-timolol-maleate-loaded-polymeric-contact-lens-coatings-containing-various-permeation-enhancers
#8
Prina Mehta, Ali Al-Kinani, Muhammad Sohail Arshad, Ming-Wei Chang, Raid G Alany, Zeeshan Ahmad
Despite exponential growth in research relating to sustained and controlled ocular drug delivery; anatomical and chemical barriers of the eye still pose formulation challenges. Nanotechnology integration into the pharmaceutical industry has aided efforts in potential ocular drug device development. Here, the integration and in vitro effect of four different permeation enhancers (PEs) on the release of anti-glaucoma drug timolol maleate (TM) from polymeric nanofiber formulations is explored. Electrohydrodynamic (EHD) engineering, more specifically electrospinning, was used to engineer nanofibers (NFs) which coated the exterior of contact lenses...
September 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28917859/superhydrophilic-graphene-oxide-electrospun-cellulose-nanofiber-hybrid-membrane-for-high-efficiency-oil-water-separation
#9
Chenghong Ao, Wei Yuan, Jiangqi Zhao, Xu He, Xiaofang Zhang, Qingye Li, Tian Xia, Wei Zhang, Canhui Lu
Inspired from fishscales, membranes with special surface wettability have been applied widely for the treatment of oily waste water. Herein, a novel superhydrophilic graphene oxide (GO)@electrospun cellulose nanofiber (CNF) membrane was successfully fabricated. This membrane exhibited a high separation efficiency, excellent antifouling properties, as well as a high flux for the gravity-driven oil/water separation. Moreover, the GO@CNF membrane was capable to effectively separate oil/water mixtures in a broad pH range or with a high concentration of salt, suggesting that this membrane was quite promising for future real-world practice in oil spill cleanup and oily wastewater treatment...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28915522/comparison-of-platelet-rich-plasma-stromal-vascular-fraction-svf-or-svf-with-an-injectable-plga-nanofiber-scaffold-for-the-treatment-of-osteochondral-injury-in-dogs
#10
Samuel P Franklin, Aaron M Stoker, Chantelle C Bozynksi, Keiichi Kuroki, Kevin M Clarke, Jed K Johnson, James L Cook
No abstract text is available yet for this article.
September 15, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28915485/long-acting-and-broad-spectrum-antimicrobial-electrospun-poly-%C3%AE%C2%B5-caprolactone-gelatin-micro-nanofibers-for-wound-dressing
#11
Rui Shi, Huan Geng, Min Gong, Jingjing Ye, Chengai Wu, Xiaohua Hu, Liqun Zhang
Trimethoxysilylpropyl octadecyldimethyl ammonium chloride (QAS), which forms facile bonds with hydroxyl groups, acts asa cationic antibacterial agent. In this work, QAS was introduced into a polycaprolactone (PCL)/gelatin hybrid in increasing concentrations to fabricate a long-acting and broad-spectrum antimicrobial micro/nanofiber membrane as a novel wound dressing. The physical interactions and chemical bonding between QAS/PCL and QAS/gelatin were demonstrated by infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS...
September 1, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28915481/general-synthesis-of-hierarchical-c-mox-mno2-m-mn-cu-co-composite-nanofibers-for-high-performance-supercapacitor-electrodes
#12
Guangdi Nie, Xiaofeng Lu, Maoqiang Chi, Mu Gao, Ce Wang
Improving the conductivity and specific surface area of electrospun carbon nanofibers (CNFs) is beneficial to a rapid realization of their applications in energy storage field. Here, a series of one-dimensional C/MOx (M=Mn, Cu, Co) nanostructures are first prepared by a simple two-step process consisting of electrospinning and thermal treatment. The presence of low-valence MOx enhances the porosity and conductivity of nanocomposites to some extent through expanding graphitic domains or mixing metallic Cu into the CNF substrates...
September 7, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28906326/tissue-engineering-strategies-for-auricular-reconstruction
#13
Michael J Schroeder, Mark S Lloyd
Simulating natural characteristics and aesthetics in reconstructed ears has provided a complex 3-dimensional puzzle for those treating patients with microtia. Costochondral grafts remain the gold standard for autologous reconstruction. However, other options such as Medpor and prosthetics are indicated depending on patient circumstances and personal choice. Research into tissue engineering offers an alternative method to a traditional surgical approach that may reduce donor-site morbidity. However, tissue engineering for microtia reconstruction brings new challenges such as cell sourcing, promotion of chondrogenesis, scaffold vascularization, and prevention of scaffold contraction...
September 12, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28905242/poly-n-acetyl-glucosamine-snag-enhances-early-rotator-cuff-tendon-healing-in-a-rat-model
#14
C A Nuss, J Huegel, J F Boorman-Padgett, D S Choi, S N Weiss, J Vournakis, L J Soslowsky
Rotator cuff injuries frequently require surgical repairs which have a high failure rate. Biological augmentation has been utilized in an attempt to improve tendon repair. Poly-N-acetyl glucosamine (sNAG) polymer containing nanofibers has been shown to increase the rate for healing of venous leg ulcers. The purpose of this study was to investigate the healing and analgesic properties of sNAG in a rat rotator cuff injury and repair model. 144 adult male Sprague-Dawley rats underwent a transection and repair of their left supraspinatus tendons...
September 13, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28904933/electrospun-gelatin-poly-glycerol-sebacate-membrane-with-controlled-release-of-antibiotics-for-wound-dressing
#15
Parisa Shirazaki, Jaleh Varshosaz, Anoushe Zargar Kharazi
BACKGROUND: The most important risk that threatens the skin wounds is infections. Therefore, fabrication of a membrane as a wound dressing with the ability of antibiotic delivery in a proper delivery rate is especially important. MATERIALS AND METHODS: Poly(glycerol sebacate) (PGS) was prepared from sebacic acid and glycerol with 1:1 ratio; then, it was added to gelatin in the 1:3 ratio and was dissolved in 80% (v/v) acetic acid, and finally, ciprofloxacin was added in 10% (w/v) of polymer solution...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28902637/development-of-fish-collagen-bioactive-glass-chitosan-composite-nanofibers-as-a-gtr-gbr-membrane-for-inducing-periodontal-tissue-regeneration
#16
Tian Zhou, Xin Liu, Baiyan Sui, Chao Liu, Xiumei Mo, Jiao Sun
The development of a guided tissue or bone regeneration (GTR/GBR) membrane with excellent performance has been a major challenge in the biomedical field. The present study was designed to prepare a biomimetic electrospun fish collagen/bioactive glass/chitosan (Col/BG/CS) composite nanofiber membrane and determine its structure, mechanical property, antibacterial activity, and biological effects on human periodontal ligament cells (HPDLCs). The effects of this composite membrane on inducing periodontal tissue regeneration were evaluated using a dog class II furcation defect model...
September 13, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28902474/electrospun-nanofibrous-meshes-cultured-with-wharton-s-jelly-stem-cell-an-alternative-for-cartilage-regeneration-without-the-need-of-growth-factors
#17
Marta Alves da Silva, Albino Martins, Ana R Costa-Pinto, Nélson Monteiro, Susana Faria, Rui L Reis, Nuno M Neves
Many efforts are being directed worldwide to the treatment of OA-focal lesions. The majority of those efforts comprise either the refinement of surgical techniques or combinations of biomaterials with various autologous cells. Herein, we tested electrospun polycaprolactone (PCL) nanofibrous meshes for cartilage tissue engineering. For that, articular chondrocytes (hACs) isolated from human osteoarthritic joints and Wharton's Jelly Stem Cells (hWJSCs) were cultured on electrospun nanofiber meshes, without adding external growth factors...
September 13, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28902168/measuring-the-pull-off-force-of-an-individual-fiber-using-a-novel-picoindenter-scanning-electron-microscope-technique
#18
Rahul Sahay, Ihor Radchenko, Arief S Budiman, Avinash Baji
We employed a novel picoindenter (PI)/scanning electron microscopy (SEM) technique to measure the pull-off force of an individual electrospun poly(vinylidene fluoride) (PVDF) fibers. Individual fibers were deposited over a channel in a custom-designed silicon substrate, which was then attached to a picoindenter. The picoindenter was then positioned firmly on the sample stage of the SEM. The picoindenter tip laterally pushed individual fibers to measure the force required to detach it from the surface of substrate...
September 13, 2017: Materials
https://www.readbyqxmd.com/read/28901994/biomineralized-conductive-pedot-pss-coated-pla-phbv-ha-nanofibrous-membranes
#19
Mohd Izzat Hassan, Noor Nabilah Masnawi, Naznin Sultana
Conductive materials are potential candidates for developing bone tissue engineering scaffolds as they are nontoxic and can enhance bone tissue regeneration. Their bioactivity can be enhanced by depositing biomineralization in simulated body fluid (SBF). In the current study, a composite electrospun membrane made up of poly(lactic) acid, poly(3-hydroxybutyrate-co-3-hydroxyvalerate), and hydroxyapatite was fabricated using an electrospinning method. The fabricated membranes were dip-coated with a conductive polymer solution, poly(3,4-ethylenedioxythiophene) poly(4-styrenesulfonate), to induce conductivity...
September 7, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28899089/highly-active-multimetallic-palladium-nanoalloys-embedded-in-conducting-polymer-as-anode-catalyst-for-electrooxidation-of-ethanol
#20
Srabanti Ghosh, Susmita Bera, Sandip Bysakh, Rajendra Nath Basu
Fabrication of multimetallic nanocatalysts with controllable composition remains a challenge for the development of low-cost electrocatalysts and incorporating metal-based catalysts into active carbon nanoarchitecture represents an emerging strategy to improve the catalytic performance of electrocatalysts. Herein, a facile method developed for Pd nanoparticles (NPs) based multimetallic alloys incorporated on polypyrrole (Ppy) nanofibers by in situ nucleation and growth of NPs using colloidal radiolytic technique...
September 13, 2017: ACS Applied Materials & Interfaces
keyword
keyword
10432
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"