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Geon-Hyoung An, Do-Young Lee, Yu-Jin Lee, Hyo-Jin Ahn
The use of metal oxides as anode materials in Li-ion batteries (LIBs) are of significant interest to many potential technologies, due to their high theoretical capacity, cost-effectiveness, and environmentally friendly features. In spite of these considerable benefits, and ongoing progress in the field, important challenges exist, associated with structural degradation due to volume expansion of electrode materials. This leads to rapid capacity fading, and must be resolved in order to move towards the practical use of high-performance LIBs with ultrafast cycling stability...
October 19, 2016: ACS Applied Materials & Interfaces
Xueqin Wang, Lvye Dou, Zhaoling Li, Liu Yang, Jianyong Yu, Bin Ding
Functional nanoparticles modified silica nanofibrous materials with good flexibility, hierarchical mesoporous structure, and excellent durability would have broad applications in efficient removal of contaminant, yet have proven to be enormously challenging to construct. Herein, we reported a strategy for rational design and fabricating flexible, hierarchical mesoporous, and robust ZrO2 nanoparticle-embedded silica nanofibrous membranes (ZrO2/SiO2 NM) for phosphate removal by combining the chitosan dip-coating method with electrospinning technique...
October 18, 2016: ACS Applied Materials & Interfaces
Andrea Fiorani, Filbert Totsingan, Antonio Pollicino, Yifeng Peng, Maria Letizia Focarete, Richard A Gross, Mariastella Scandola
Oligo(Glu70 -co-Leu30 ), a peptide synthesized by protease catalysis, is functionalized at the N-terminus with a 4-pentenoyl unit and grafted to polyLSL[6'Ac,6″Ac], a glycopolymer prepared by ring-opening metathesis polymerization of lactonic sophorolipid diacetate. First, polyLSL[6'Ac,6"Ac] fiber mats are fabricated by electrospinning. Oxidation of the fiber mats and subsequent reaction with cysteamine lead to thiol-functionalized fiber mats with no significant morphology changes. Grafting of the alkene-modified oligopeptide to thiol-functionalized polyLSL[6'Ac,6″Ac] fiber mats is achieved via "thiol-ene" click reaction...
October 18, 2016: Macromolecular Bioscience
Shuai Jiang, Beatriz Chiyin Ma, Jonas Reinholz, Qifeng Li, Junwei Wang, Kai A I Zhang, Katharina Landfester, Daniel Crespy
Materials with a hierarchical structure often demonstrate superior properties with combined and even synergistic effects of multiple functions. Herein, we report the design of a new class of material with a multicompartment nanofibrous structure as a promising candidate for antibacterial wound dressing and functional textile applications. The design consists in first synthesizing nanocapsules loaded with functional payloads and subsequently embedding the nanocapsules into polymer nanofibers by using colloid-electrospinning technique...
October 18, 2016: ACS Applied Materials & Interfaces
Faeze Pournaqi, Armaghan Ghiaee, Saeid Vakilian, Abdolreza Ardeshirylajimi
Tissue engineering is a promising emerged method trying to reconstruct lost tissues that using synthetic and biomaterials and their combination with cells. The purpose of this study is increase osteoinductivity of polyethersulfone (PES) by using polyaniline (PANi). In this study, after fabrication of PES and composited PES-PANi scaffolds by electrospinning, scaffolds were characterized morphologically and mechanically. Then osteoinductivity of scaffolds was investigated by osteogenic differentiation of human mesenchymal stem cells (MSCs) cultured on the PES and PES-PANI in comparison to the tissue culture polystyrene as a control...
October 14, 2016: Biologicals: Journal of the International Association of Biological Standardization
Serban San-Marina, Ayushman Sharma, Stephen G Voss, Jeffrey R Janus, Grant S Hamilton
Importance: Nasal reconstruction in patients who are missing a significant amount of structural nasal support remains a difficult challenge. One challenge is the deficiency of cartilage left within the nose as a consequence of rhinectomy or a midline destructive disease. Historically, the standard donor source for large quantities of native cartilage has been costal cartilage. Objective: To enable the development of protocols for new mesenchymal stem cell technologies as alternative procedures with reduced donor site morbidity, risk of infection and extrusion...
October 13, 2016: JAMA Facial Plastic Surgery
Yan Wang, Xu Zhao, Yang Tian, Yanbin Wang, Abdul Khaliq Jan, Yutong Chen
The film forming ability and conductivity of g-C3N4 are still unsatisfying despite much progress having been made in g-C3N4 related photocatalysts. New methods for synthesizing g-C3N4 films coupled with excellent conductive materials are of significance. Herein, a facile method for synthesizing novel carbonized PVP/g-C3N4 (CPVP/g-C3N4) films have been developed via electrospinning technique. Nano carbons are generated by in-situ carbonization of PVP in the films, which could enhance the photoelectrochemical (PEC) performance of the films due to its good conductivity...
October 13, 2016: Chemistry: a European Journal
Yuanwei Wang, Yihua Zhu, Jianfei Huang, Jin Cai, Jingrun Zhu, Xiaoling Yang, Jianhua Shen, Hao Jiang, Chunzhong Li
Perovskite quantum dots with superior optical performances are supposed to be desirable for fluorescence resonance energy transfer (FRET) based fluorescence detection, which is popular for its accuracy and simplicity. In this work, a monolithic superhydrophobic polystyrene fiber membrane encapsulated with CsPbBr3 perovskite quantum dots (CPBQDs/PS FM) was prepared via electrospinning. Combining the outstanding optical properties of CPBQDs and stability of PS, this CPBQDs/PS FM exhibits high quantum yields (~91%) and narrow half-peak width (~16 nm), nearly 100% fluorescence retention after being immersed in water for 10 days, 79...
October 13, 2016: Journal of Physical Chemistry Letters
Eleonora Cianci, Oriana Trubiani, Francesca Diomede, Ilaria Merciaro, Ida Meschini, Pantaleone Bruni, Fausto Croce, Mario Romano
Lipoxin (LX)A4 is a lipoxygenase-formed arachidonic acid metabolite with potent anti-inflammatory, pro-resolution properties. Its therapeutic efficacy has been largely demonstrated in a variety of cellular, preclinical and clinical models. Among these, periodontal disease, where LXA4 promotes tissue repair, also by modulating functions of human periodontal ligament stem cells (hPDLSCs). As medicated biomembranes may be particularly useful in clinical settings, where local stimulation of tissue repair is needed, we used electrospinning to embed LXA4 in membranes made of poly(ethylene oxide) (PEO) and poly(D,L-lactide) (PDLLA)...
October 9, 2016: International Journal of Pharmaceutics
Karina Ferreira Noronha Cruz, Daniela Maria Ducatti Formaggio, Dayane Batista Tada, Fernando Henrique Cristovan, Lilia Müller Guerrini
Electroactive nanofibers based on thermoplastic polyurethane (TPU) and poly (alkoxy anilines) produced by electrospinning has been explored for biomaterials applications. The thermoplastic polyurethane is a biocompatible polymer with good mechanical properties. The production of TPU nanofibers requires the application of high voltage during electrospinning in order to prepare uniform mats due to its weak ability to elongate during the process. In order to overcome this limitation, a conductive polymer can be incorporated to the process, allowing generates mats without defects...
October 11, 2016: Journal of Biomedical Materials Research. Part A
Olivera Evrova, Vahid Hosseini, Vincent Milleret, Gemma Palazzolo, Marcy Zenobi-Wong, Tullio Sulser, Johanna Buschmann, Daniel Eberli
Cellular responses are regulated by their microenvironments and engineered synthetic scaffolds can offer control over different microenvironment properties. This important relationship can be used as a tool to manipulate cell fate and cell responses for different biomedical applications. We showed for the first time in this study how blending of poly(ethylene oxide) (PEO) to poly(lactic-co-glycolic acid) (PLGA) fibers to yield hybrid scaffolds changes physical and mechanical properties of PLGA fibrous scaffolds and in turn affects cellular response...
October 11, 2016: ACS Applied Materials & Interfaces
Aysu Arslan, Soner Çakmak, Alper Cengiz, Menemşe Gümüşderelioğlu
The aliphatic-aromatic copolyester, poly(butylene adipate-co-terephthalate) (PBAT) combines good mechanical and thermal properties with biodegradation ability. However, until now, researches in its potential medical use remain limited. Only in a few studies blends of PBAT with routinely used biocompatible polymers had been prepared and investigated regarding tissue engineering applications. Therefore, in this study, we decided to determine processability of neat PBAT as a scaffold material for bone tissue by using different fabrication methods i...
October 10, 2016: Journal of Biomaterials Science. Polymer Edition
Changling Li, Chueh Liu, Wei Wang, Jeffrey Bell, Zafer Mutlu, Kazi Ahmed, Rachel Ye, Mihrimah Ozkan, Cengiz S Ozkan
Flexible electrodes (C-Si/C) composed of Si/C fibers trapped in carbon fiber frames via double-nozzle electrospinning improve the cycling stability and rate capability of Si/C fabrics. Polyacrylonitrile (PAN) has been demonstrated as a superior carbon matrix for Si compared with polyvinylpyrrolidone (PVP) annealed using the same heat-treatment process.
September 15, 2016: Chemical Communications: Chem Comm
Cristina Busuioc, Alexandru Evanghelidis, Andrei Galatanu, Ionut Enculescu
Multiple and complex functionalities are a demand nowadays for almost all materials, including common day-to-day materials such as paper, textiles, wood, etc. In the present report, the surface temperature control of different types of materials, including paper and textiles, was demonstrated by Joule heating of metallic-web transparent electrodes both by direct current and by RF induced eddy currents. Polymeric submicronic fiber webs were prepared by electrospinning, and metal sputtering was subsequently performed to transform them into flexible transparent electrodes...
October 10, 2016: Scientific Reports
Tae-Woong Kim, Soo-Jin Park
Reduced graphene oxide (rGO)/thorn-like TiO2 nanofiber (TTF) aerogels, or GTTF aerogels, with different TTF weight ratios were successfully prepared by electrospinning, silica etching and hydrothermal combination method. During the hydrothermal reaction, the rGO nanosheets and TTF self-assembled into three-dimensional (3D) interconnected networks, in which the TTF is loaded onto the rGO nanosheets. The electrochemical performance of the GTTF aerogels was assessed using cyclic voltammetry and galvanostatic charge-discharge measurements in a 1M aqueous Na2SO4 electrolyte...
October 5, 2016: Journal of Colloid and Interface Science
Parisa Sanaei-Rad, Tahereh-Sadat Jafarzadeh Kashi, Ehsan Seyedjafari, Masoud Soleimani
A combination of polymeric materials and bioceramics has recently received a great deal of attention for bone tissue engineering applications. In the present study, hybrid nanofibrous scaffolds were fabricated from PLGA and gelatin via electrospinning and then were coated with hydroxyapatite (HA). They were then characterized and used in stem cell culture studies for the evaluation of their biological behavior and osteogenic differentiation in vitro. This study showed that all PLGA, hybrid PLGA/gelatin and HA-PLGA/gelatin scaffolds were composed of ultrafine fibers with smooth morphology and interconnected pores...
October 5, 2016: Biologicals: Journal of the International Association of Biological Standardization
Hirak K Patra, Yashpal Sharma, Mohammad Mirazul Islam, Mohammad Javad Jafari, N Arul Murugan, Hisatoshi Kobayashi, Anthony P F Turner, Ashutosh Tiwari
To cope with the rapid evolution of the tissue engineering field, it is now essential to incorporate the use of on-site responsive scaffolds. Therefore, it is of utmost importance to find new 'Intelligent' biomaterials that can respond to the physicochemical changes in the microenvironment. In this present report, we have developed biocompatible stimuli responsive polyaniline-multiwalled carbon nanotube/poly(N-isopropylacrylamide), (PANI-MWCNT/PNIPAm) composite nanofiber networks and demonstrated the physiological temperature coordinated cell grafting phenomenon on its surface...
October 6, 2016: Nanoscale
Huihua Yuan, Jinbao Qin, Jing Xie, Biyun Li, Zhepao Yu, Zhiyou Peng, Bingcheng Yi, Xiangxin Lou, Xinwu Lu, Yanzhong Zhang
This study was designed to assess the efficacy of hyaluronan (HA) functionalized well-aligned nanofibers of poly-l-lactic acid (PLLA) in modulating the phenotypic expression of vascular smooth muscle cells (vSMCs) for blood vessel regeneration. Highly aligned HA/PLLA nanofibers in core-shell structure were prepared using a novel stable jet electrospinning approach. Formation of a thin HA-coating layer atop each PLLA nanofiber surface endowed the uni-directionally oriented fibrous mats with increased anisotropic wettability and mechanical compliance...
September 15, 2016: Nanoscale
Dan Li, Qianli Ma, Yan Song, Xue Xi, Xiangting Dong, Wensheng Yu, Jinxian Wang, Guixia Liu
Luminescent-magnetic bifunctional NaGdF4:Dy(3+) nanofibers and nanobelts have been successfully fabricated by a combination of electrospinning followed by subsequent calcination with fluorination technology for the first time. The structure, morphologies, and luminescence and magnetic properties of the synthesized materials have been investigated by a variety of techniques. X-ray diffraction (XRD) analysis shows that as-prepared NaGdF4:Dy(3+) nanostructures are pure hexagonal structures. Scanning electron microscopy (SEM) observations indicate that directly electrospinning-made PVP/[NaNO3 + Gd(NO3)3 + Dy(NO3)3] composite nanofibers and nanobelts have smooth surfaces, good dispersion and uniform size, and surfaces of NaGdF4:Dy(3+) nanofibers and nanobelts become rough after calcination and fluorination processes...
October 5, 2016: Physical Chemistry Chemical Physics: PCCP
Tiantian Yu, Bo Lin, Qiufeng Li, Xiaoguang Wang, Weili Qu, Sen Zhang, Chao Deng
The design of a freestanding electrode is the key to the development of energy storage devices with superior electrochemical performance and mechanical durability. Herein, we propose a highly-scalable strategy for the facile synthesis of a freestanding alluaudite Na2+2xFe2-x(SO4)3@porous carbon-nanofiber hybrid film, which is used as a self-supported and flexible electrode for sodium ion batteries. By the combined use of electrospinning and electrospraying, the freestanding hybrid film is constructed in the form of sulfate nanoparticles enwrapped in highly porous graphitic-like carbon-nanofibers...
September 29, 2016: Physical Chemistry Chemical Physics: PCCP
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