Nanofibers coating with

S. Mu, Novel properties of polyanihne nanofibers coated with polycatechol, Synth. Met., 156, 202-208 (2006). 

It was found that polyaniline nanofibers coated with polycatechol (60-90 nm) have good electrochemical activity over a wide pH range and can catalyze the oxidation of ascorbic acid in a 0.1 M citrate buffer solution of pH 5.6 [91]. An oxidation peak of ascorbic acid appears at 0.05 V (vs. SCE). The catalytic characteristics are that its oxidation peak potential is lower than that at the bare platinum electrode and that polymer nanofibers with the diameters of 60-90 nm have a higher catalytic activity (current density) than those with diameters of 140-210 nm. 

Yu DG, Zhou J, Chatterton NP, Li Y, Huang J, Wang X (2012) Polyacrylonitrile nanofibers coated with silver nanoparticles using a modified coaxial electrospinning process. Int J Nanomed 7 5725-5732... 

Figure 11 (a) AFM image of PS nanofibers coated with P4VP layer prepared on Si-substrate, (b) sectional profile and (c) 3D-image... 

Nanofibers coated with carbon, copper, and aluminum fabricated using plasma enhanced chemical vapor deposition and physical vapor deposition. 

Drew, C., X. Y. Wang, F. F. Bruno, L. A. Samuelson, and J. Kumar (2005). Electrospun pol5mer nanofibers coated with metal oxides by liquid phase deposition. Composite Interfaces 11(8—9) 711—724. 

Mavis B, Demirta TT, Gtimiigderelioglu M, Giindiiz G, olak U. Synthesis, characterization and osteoblastic activity of polycaprolactone nanofibers coated with biomimetic calcium phosphate. Acta Biomater 2009 5(8) 3098-lll. 

The supported Ni catalysts (5 wt.%) for H2S oxidation were prepared by incipient wetness impregnation of the two supports, i.e. SiC grains and graphite felt coated with carbon nanofibers, with an aqueous solution of Ni(N03)2.6H20 (Merck). After drying overnight at 120°C, the catalysts were calcined at 350°C for 2h in order to decompose the nitrate salt and to form the nickel oxide. The corresponding sulfidic catalysts were obtained by sulfidation of NiO by reaction with a H2S/He flow at 300°C. 

Y-W. Ju, G-R. Choi, H-R. Jimg, and W-J. Lee, Electrochemical properties of electrospun PAN/MWCNT carbon nanofibers electrodes coated with polypyrrole, Electrochim. Acta, 53, 5796-5803 (2008). 

Figure 12.12 Atomic force microscopy (AFM) images of uncoated (left) and PEDOT-PSS-coated (right) TiO nanofiber. Reproduced with permission from Ref. [66], Copyright 2013 Elsevier.

A complementary approach to the fabrication of nanotubes involves the use of hard templates as tools. Hard templates are either nanofibers or porous host materials. In the former case, the nanofibers are at first coated with the waU material of the tubes or a corresponding precursor. Subsequently, the template fiber, that is, the core of the hybrid fiber thus obtained, is selectively removed so that a shell of the material initially deposited onto the template nanofiber is conserved. Template fibers can, for example, be produced in high... 

Morphological studies were performed by SEM observations of PEDOT-PSS/PVAc composites of electrospun nanofibers and the samples for the SEM measurements are coated with gold. 

The catalysts can be prepared by coelectrospinning of poly(amido amine) dendrimers and poly(ethylene oxide). These nanofibers can be coated with poly(/ -xylylene) by chemical vapor deposition. 

It has been known since the early stage of conducting polymer research that polyandine fibrils of 100 nm in diameter can naturally form on the surface of an electrode [4,40-45] with a compact microspheriod underlayer. Some recent work demonstrates that pure polyaniline nanofibers can be obtained without the need for any template by controlling the polymerization rate [46—48]. Although this process is not readily scalable from a materials point of view, such work could be very important for making functional devices, since nanofiber-coated electrodes can be used as a platform to fabricate sensors and transistors. Interconnected network-like structures with polyaniline nanoKnkers 10-50 nm wide have also been identified in polymer blends [49-51]. 

Two types of poly electrolyte nanofiber mats were prepared in this study. One was polyacrylic acid (Mv = 450,000) fibers, spun from 5 wt% of aqueous solution. The other one was polysulfone fibers, spun from 25 wt% of DMF solution. The polysulfone fiber was then coated with a layer of polyelectrolyte, FAMPS, by a surface grafting technique (FAMFS-g-FS) similar to the procedure described previously. Nucrel membranes wereprepared by heat pressing Nucrel 535 (DuPont) pellets at 125°C. For fiber encapsulation, the fiber mats with measured weight and thickness were placed between two preweighed Nucrel membranes and then pressed at 125°C. The resulting composite membranes were flexible and robust with a homogeneous transparency. 

Araujo et al. (2008) prepared PCL electrospun nanofiber meshes coated with a biomimetic calcium phosphate (BCP) layer that mimics the extracellular microenvironment found in the human bone structure. The deposition of a calcium phosphate layer, similar to the inorganic phase of bone, on the PCL nanofiber meshes was... 

In another study, the so-called sohd-liquid-solid (SLS) technique was used to prepare a silicon oxide nanofiber surface [64]. The amorphous sihcon oxide nanofibers shown in Fig. 10b were made by heating a silicon substrate coated with a thin gold layer at 1100°C for 3 h in a lutrogen atmosphere in contrast to the previous example, no additional source of silicon materials was used in this case. As before, the nanofiber growth starts at the interface of the Au/Si alloy droplet and the Si substrate and is maintained by the diffusion of the Si atoms from the substrate to the interface [65]. The surface was then UV/ozone-treated to generate surface hydroxyl groups that were subsequently reacted with perfluorodecyltrichlorosilane. The chemically modified nanofiber surface exhibited a WCA of 152°. 

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