keyword
MENU ▼
Read by QxMD icon Read
search

Nanofiber

keyword
https://www.readbyqxmd.com/read/28934135/novel-self-assembly-induced-gelation-for-nanofibrous-collagen-hydroxyapatite-composite-microspheres
#1
Jae-Won Choi, Jong-Woo Kim, In-Hwan Jo, Young-Hag Koh, Hyoun-Ee Kim
This study demonstrates the utility of the newly developed self-assembly-induced gelation technique for the synthesis of porous collagen/hydroxyapatite (HA) composite microspheres with a nanofibrous structure. This new approach can produce microspheres of a uniform size using the droplets that form at the nozzle tip before gelation. These microspheres can have a highly nanofibrous structure due to the immersion of the droplets in a coagulation bath (water/acetone), in which the collagen aggregates in the solution can self-assemble into fibrils due to pH-dependent precipitation...
September 21, 2017: Materials
https://www.readbyqxmd.com/read/28933477/a-cobalt-ii-heteroarylalkenolate-precursor-for-homogeneous-co3o4-coatings-by-atomic-layer-deposition
#2
Mehtap Büyükyazi, Thomas Fischer, Penmgei Yu, Mariona Coll, Sanjay Mathur
We present a new and efficient cobalt precursor, Co(II)(DMOCHCOCF3)2, to prepare Co3O4 thin films and conformal coatings. In the synthesis of this Co complex, heteroaryl moieties and CF3-groups were combined leading to the precursor with high thermal stability and volatility. The suitability of this precursor for ALD deposition was tested on flat silicon substrates and TiO2/C nanofibers upon process optimization. Deposition at 200 °C results in homogeneous and smooth Co3O4 thin films with a growth rate of 0...
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28932862/tailored-release-of-triiodothyronine-and-retinoic-acid-from-a-spatio-temporally-fabricated-nanofiber-composite-instigating-neuronal-differentiation
#3
Aishwarya Satish, Purna Sai Korrapati
Regeneration of the central and peripheral nervous system is challenging since the functional restoration of injured nerves is an incredible task. The fabrication of an ideal nerve guide that fulfills the requirement to regenerate nerve tissue is a herculean challenge requiring a combination of both biochemical and topographical cues. The present study explores the combinatorial effect of aligned nanofibers and the regulated delivery of triiodothyronine and retinoic acid on nerve regeneration. A sequential release mechanism is adopted in fabricating the nanofiber scaffold, with triiodothyronine incorporated into the nanofiber shell ensuring its prior release, followed by retinoic acid (entrapped within zein nanoparticles) from the core...
September 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28932749/vascular-tissue-engineering-effects-of-integrating-collagen-into-a-pcl-based-nanofiber-material
#4
Ulf Bertram, Dominik Steiner, Benjamin Poppitz, Dirk Dippold, Katrin Köhn, Justus P Beier, Rainer Detsch, Aldo R Boccaccini, Dirk W Schubert, Raymund E Horch, Andreas Arkudas
The engineering of vascular grafts is a growing field in regenerative medicine. Although numerous attempts have been made, the current vascular grafts made of polyurethane (PU), Dacron®, or Teflon® still display unsatisfying results. Electrospinning of biopolymers and native proteins has been in the focus of research to imitate the extracellular matrix (ECM) of vessels to produce a small caliber, off-the-shelf tissue engineered vascular graft (TEVG) as a substitute for poorly performing PU, Dacron, or Teflon prostheses...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28932676/carbon-nanofibers-heavy-laden-with-li3v2-po4-3-particles-featuring-superb-kinetics-for-high-power-lithium-ion-battery
#5
Jeongyim Shin, Junghoon Yang, Chernov Sergey, Min-Sang Song, Yong-Mook Kang
Fast lithium ion and electron transport inside electrode materials are essential to realize its superb electrochemical performances for lithium rechargeable batteries. Herein, a distinctive structure of cathode material is proposed, which can simultaneously satisfy these requirements. Nanosized Li3V2(PO4)3 (LVP) particles can be successfully grown up on the carbon nanofiber via electrospinning method followed by a controlled heat-treatment. Herein, LVP particles are anchored onto the surface of carbon nanofiber, and with this growing process, the size of LVP particles as well as the thickness of carbon nanofiber can be regulated together...
September 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28929732/highly-durable-self-standing-solid-state-supercapacitor-based-on-an-ionic-liquid-rich-ionogel-and-porous-carbon-nanofiber-electrodes
#6
Silas K Simotwo, Parameswara Rao Chinnam, Stephanie L Wunder, Vibha Kalra
A high-performance, self-standing solid-state supercapacitor is prepared by incorporating an ionic liquid (IL)-rich ionogel made with 95 wt % IL (1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) and 5 wt % methyl cellulose, a polymer matrix, into highly interconnected 3-D activated carbon nanofiber (CNF) electrodes. The ionogel exhibits strong mechanical properties with a storage modulus of 5 MPa and a high ionic conductivity of 5.7 mS cm(-1) at 25 °C. The high-surface-area CNF-based electrode (2282 m(2) g(-1)), obtained via an electrospinning technique, exhibits hierarchical porosity generated both in situ during pyrolysis and ex situ via KOH activation...
September 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28929563/morphology-dependent-cell-imaging-by-a-self-assembled-diacetylene-peptide-amphiphile
#7
Carsten Schmuck, Hao Jiang, Xiao-Yu Hu, Stefanie Schlesiger, Mao Li, Elio Zellermann, Shirley Knauer
Herein, a novel cationic peptide gemini amphiphile containing diacetylene motifs (DA2P) is presented which self-assembles into novel tadpole- and bola-shaped nanostructures at low concentration and nanofibers at higher concentration, respectively. Interestingly, the DA2P assemblies can be polymerized to a fluorescent red phase but only during incubation with HeLa cells, most likely owing to the reorganization of the diacetylene chains of DA2P upon interaction with the cell membrane. The red-fluorescent polymerized DA2P assemblies can serve as a novel cell imaging probe...
September 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28926978/fabrication-of-magnetic-nanofibers-by-needleless-electrospinning-from-a-self-assembling-polymer-ferrofluid-cone-array
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
Prina Mehta, Ali A 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 14, 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
#16
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
#17
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
#18
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
#19
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
#20
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
keyword
keyword
89466
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"