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Qingwang Lian, Gang Zhou, Xiaohui Zeng, Chen Wu, Yuehua Wei, Chao Cui, Weifeng Wei, Libao Chen, Cheng-Chao Li
Carbon coated SnS/SnO2 heterostructures wrapping on the carbon nanofibers (C@SnS/SnO2@CNFs) was demonstrated to have excellent performance as an anode material for Li-ion batteries. C@SnS/SnO2@CNFs electrode deliver high reversible capacity of 826.8 mAh g(-1) (500(th) cycle) at the current density of 1.0 A g(-1). However, an interesting phenomenon of increasing capacity on cycling can be observed. According to the analysis of the evolution of structure and electrochemical property, C@SnS/SnO2@CNFs is demonstrated to experience the progress of conversion from nanowalls containing polycrystals into amorphous nanosheets with high porosity and larger surface upon cycling...
October 21, 2016: ACS Applied Materials & Interfaces
Sahadevan Rajesh, Yong Zhao, Hao Fong, Todd J Menkhaus
Nanofiltration membranes were prepared by forming multilayers of branched polyethylenimine (BPEI) and polyacrylic acid (PAA) on a polyacrylonitrile (PAN) nanofibrous mat by layer-by-layer (LbL) assembly. The degree of ionization (DI) of PAA, estimated using FTIR spectra both in the absence and presence of added salt, was shown to have a strong influence on the BPEI/PAA film growth. BPEI/PAA multilayers grew exponentially when the DI of PAA was less than 30%, or when the pH of PAA during LbL formation was less than 3...
October 21, 2016: Nanoscale
Khosro Adibkia, Golrokh Khorasani, Shahriar Payab, Farzaneh Lotfipour
Purpose: Bacterial pneumonia is a common lung infection caused by different types of bacteria. Azithromycin (AZI), an azalide antibiotic, is widely used to manage pneumococcal infections. Studies have shown that antibiotics in nanocarriers may lead to increased antibacterial activity and reduced toxicity. The aim of this work was to valuate in vitro antibacterial performance azithromycin-Eudragit RS100 nano-formulations against Streptococcus pneumoniae and Staphylococcus aureus. Methods: AZI-Eudragit RS100 nanoparticles were prepared via electrospinning technique and the in vitro antibacterial performance against S...
September 2016: Advanced Pharmaceutical Bulletin
Mohammad Samiei, Marziyeh Aghazadeh, Effat Alizadeh, Naser Aslaminabadi, Soodabeh Davaran, Sajjad Shirazi, Farhad Ashrafi, Roya Salehi
Purpose: Statin is an effective factor for promoting osteogenesis. The aim of the present study was to evaluate the effect of simvastatin (SIM) and/or HA addition on changes in osteogenesis levels by human DPSCs transferred onto three-dimensional (3D) nanofibrous Poly (ε-caprolactone) (PCL)/Poly lactic acide (PLLA) polymeric scaffolds. Methods: For this purpose, a 3D nanofibrous composite scaffold of PCL/PLLA/HA was prepared by electrospinning method. SIM was added to scaffolds during DPSCs culturing step...
September 2016: Advanced Pharmaceutical Bulletin
Sorina Motoc, Florica Manea, Adriana Iacob, Alberto Martinez-Joaristi, Jorge Gascon, Aniela Pop, Joop Schoonman
In this study, the detection protocols for the individual, selective, and simultaneous determination of ibuprofen (IBP) and diclofenac (DCF) in aqueous solutions have been developed using HKUST-1 metal-organic framework-carbon nanofiber composite (HKUST-CNF) electrode. The morphological and electrical characterization of modified composite electrode prepared by film casting was studied by scanning electronic microscopy and four-point-probe methods. The electrochemical characterization of the electrode by cyclic voltammetry (CV) was considered the reference basis for the optimization of the operating conditions for chronoamperometry (CA) and multiple-pulsed amperometry (MPA)...
October 17, 2016: Sensors
Luciano M Santino, Yang Lu, Shinjita Acharya, Liana Bloom, Daniel Cotton, Aly Wayne, Julio M D'Arcy
Electrochemical capacitors fabricated with polyaniline nanofibers are cycled 150 000 times with 98% capacitance retention. These devices maintain an energy density of 11.41 Wh/kg at a power density of 4000 W/kg, 64 times greater than that of an identically fabricated device based on activated carbon (0.177 Wh/kg at 4600 W/kg). For applications requiring a higher specific energy, 33.39 Wh/kg at a specific power of 600 W/kg is obtained by widening the voltage window; this device retains 93% capacitance after 10 000 cycles...
October 20, 2016: ACS Applied Materials & Interfaces
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
Fengyang Xu, Jie Liu, Jian Tian, Lingfeng Gao, Xiaju Cheng, Yue Pan, Ziling Sun, Xinming Li
In this work, we reported the generation of a novel supramolecular hydrogelator from a peptide derivative which consisted of a structural motif (e.g., Fc-FF) for supramolecular self-assembly and a functional moiety (e.g., RGD) for integrin binding. Following self-assembly in water at neutral pH, this molecule firstly tended to form metastable spherical aggregates, which subsequently underwent a morphological transformation to form high-aspect-ratio nanostructures over 2 h when aged at room temperature. More importantly, because of the presence of nanoscale RGD clusters on the surface of nanostructures, the self-assembled nanomaterials (e...
October 19, 2016: ACS Applied Materials & Interfaces
Lauren Sfakis, Tim Kamaldinov, Melinda Larsen, James Castracane, Alexander Khmaladze
Quantifying confocal images to enable location of specific proteins of interest in 3D is important for many tissue engineering applications. Quantification of protein localization is essential for evaluation of specific scaffold constructs for cell growth and differentiation for application in tissue engineering and tissue regeneration strategies. Although obtaining information regarding protein expression levels is important, the location of proteins within cells grown on scaffolds is often key to evaluating scaffold efficacy...
October 19, 2016: Tissue Engineering. Part C, Methods
Shih-Feng Chou, Kim A Woodrow
Electrospun nanofibers have the potential to achieve high drug loading and the ability to sustain drug release. Mechanical properties of the drug-incorporated fibers suggest the importance of drug-polymer interactions. In this study, we investigated the mechanical properties of electrospun polycaprolactone (PCL) and poly (D,L-lactic-co-glycolic) acid (PLGA) fibers at various blend ratios in the presence and absence of a small molecule hydrophilic drug, tenofovir (TFV). Young׳s modulus of the blend fibers showed dependence on PLGA content and the addition of the drug...
September 9, 2016: Journal of the Mechanical Behavior of Biomedical Materials
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
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
Jeong-Ann Park, Song-Bae Kim
Antimicrobial electrospun poly(vinyl alcohol) (PVA) nanofibers were synthesized by impregnating benzyl triethylammonium chloride (BTEAC) as an antimicrobial agent into PVA nanofibers. The BTEAC-PVA nanofibers were heat-methanol treated during the preparation for various tests. The BTEAC-PVA nanofibers became more hydrophilic than the PVA nanofibers due to incorporation of BTEAC. Through heat-methanol treatment, thermal property, crystallinity, and water stability of BTEAC-PVA nanofibers were improved considerably...
October 14, 2016: Chemosphere
Zahed Shami, Seyed Mojtaba Amininasab, Pegah Shakeri
A straightforward approach was successfully developed to fabricate a well-designed three-dimensional rough sheetlike MgAl-layered double hydroxide (LDH) array to stand vertically on poly(acrylonitrile) porous nanofibrous membranes based on an electrospun-nanofiber-templated in situ hydrothermal strategy, and then the surface was modified with cyclohexanecarboxylic acid. The as-spun highly dense ordered sheetlike LDH porous nanofabric exhibited a superior durability in superhydrophobicity and superoleophilicity, which has achieved high oil-removing capability including both oil harvesting and oil separation to harvest/separate a wide range of organic solvents and oils from an oil-water mixture and, especially, exhibited a very good recycling and reusing performance...
October 17, 2016: ACS Applied Materials & Interfaces
Katarzyna Szot-Karpińska, Piotr Golec, Adam Lesniewski, Barbara Palys, Frank Marken, Joanna Niedziółka-Jönsson, Grzegorz Wegrzyn, Marcin Łoś
With the advent of nanotechnology, carbon nanomaterials such as carbon nanofibers (CNF) have aroused substantial interest in various research fields including energy storage and sensing. Further improvement of their properties might be achieved via application of viral particles such as bacteriophages. In this report we present a filamentous M13 bacteriophage, with a point mutation in gene VII (pVII-mutant-M13), that selectively binds to the carbon nanofibers to form 3D structures. The phage-display technique was utilized for the selection of the pVII-mutant-M13 phage from the phage display peptide library...
October 17, 2016: Bioconjugate Chemistry
Xinglei Zhao, Shan Wang, Xia Yin, Jianyong Yu, Bin Ding
Fabrication of air filtration materials (AFM) that allow air to easily flow through while retaining particles is a significant and urgent need due to the harmful airborne particulate matter pollution; however, this is still a challenging research area. Herein, we report novel slip-effect functional nanofibrous membranes with decreased air resistance (reduction rate of 40%) due to the slip flow of air molecules on the periphery of nanofibers. This was achieved through careful control over the diameters of electrospun polyacrylonitrile fibers and aperture size of fiber assembly...
October 17, 2016: Scientific Reports
Karin Kornmueller, Bernhard Lehofer, Claudia Meindl, Eleonore Fröhlich, Gerd Leitinger, Heinz Amenitsch, Ruth Prassl
Self-assembling amphiphilic designer peptides have been successfully applied as nanomaterials in biomedical applications. Understanding molecular interactions at the peptide-membrane interface is crucial, since interactions at this site often determine (in)compatibility. The present study aims to elucidate how model membrane systems of different complexity (in particular single-component phospholipid bilayers and lipoproteins) respond to the presence of amphiphilic designer peptides. We focused on two short anionic peptides, V₄WD₂ and A₆YD, which are structurally similar, but showed a different self-assembly behavior...
October 14, 2016: Biomacromolecules
Jennifer Gamboa Jackman, Hemraj Juwarker, Luke P Poveromo, Howard Levinson, Kam W Leong, Bruce A Sullenger
Dying cells release nucleic acids (NA) and NA-containing complexes that activate inflammatory pathways of immune cells. Sustained activation of these pathways contributes to chronic inflammation frequently encountered in autoimmune and inflammatory diseases. In this study, grafting of cationic polymers onto a nanofibrous mesh enabled local scavenging of negatively charged pro-inflammatory molecules in the extracellular space. Nucleic acid scavenging nanofibers (NASFs) formed from poly(styrene-alt-maleic anhydride) conjugated with 1...
October 14, 2016: Biomacromolecules
Felipe de Salas, Isabel Pardo, Horacio J Salavagione, Pablo Aza, Eleni Amougi, Jesper Vind, Angel T Martínez, Susana Camarero
Polyaniline is a conductive polymer with distinctive optical and electrical properties. Its enzymatic synthesis is an environmentally friendly alternative to the use of harsh oxidants and extremely acidic conditions. 7D5L, a high-redox potential laccase developed in our lab, is the biocatalyst of choice for the synthesis of green polyaniline (emeraldine salt) due to its superior ability to oxidize aniline and kinetic stability at the required polymerization conditions (pH 3 and presence of anionic surfactants) as compared with other fungal laccases...
2016: PloS One
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