Copper nanofiber

Isothermal and non-isothermal crystallization studies showed that the presence of nanofiller (multiwall carbon nanotubes, silver nanoparticles, nanodiamonds and copper-nanofibers) caused enhancement of crystallization rates and that the most effective nucleation was achieved using MWCNT. The crystals of a-type dominated, except in case of the sPS/MWCNT nanocomposite in which mairdy P-type crystals appeared. ... 

Copper has been immobilized on glycylglycine bolaamphiphile peptide nanotubes that display histidine residues, and paramagnetic gadolinium, a magnetic resonance image contrast agent, has been immobilized on nanofibers produced from peptide amphiphiles (see Gazit, 2007 and references therein). 

Ghaee et al. [80] studied the adsorption property of copper and nickel on macroporous CS membranes. Batch adsorption experiments were carried out with mono- and bicomponent solutions on CS membrane. In monocomponent adsorption, the copper ion adsorption was 19.87 mg/g, which was higher than those of nickel (i.e., 5.21 mg/g). Maximum adsorptions for copper and nickel were 25.64 and 10.3 mg/g, respectively. Compared to monoadsorption, the amount of adsorption for individual component in bicomponent mixtures showed a decrease. That is due to the competitive adsorption and coordination site limitation. Aliabadi et al. [81] prepared electro-spun nanofiber membrane of PE oxide/CS for the adsorption of nickel, cadmium, lead, and copper ions from aqueous solutions. The maximum adsorption capacity of nickel, copper, cadmium, and lead ions by the PEO/CS nanofiber membrane followed the descending order nickel(II) > copper(II) > cadmium(II) > lead(II). 

Aliabadi, M., Irani, M., Piri, H., and Pamian, M. J. 2013. Electrospnn nanofiber membrane of PEO/chitosan for the adsorption of nickel, cadmium, lead and copper ions from aqueous solution. Chem. Eng. J. 220 237-243. 

There are no reports about PANI composites with oxides of silver and gold because of the high redox reactivity of these oxides (e.g., Ag O and Au O can oxidize PANI), while PANI composites with copper oxides are known. Electrodeposition of mesoporous bilayers of PANI supported Cu O semiconducting films from lyotropic liquid crystalline phase has recently been reported by Xue et al. [16]. The control of size, morphology, and conductivity of PANI nanofibers (PANI-NFs) in PANI-NFs/CuO nanocomposites (Figure 2.1) was achieved by systematic variation of CuO loadings during the oxidative polymerization of aniline with mixture of oxidants [ammonium peroxydisulfate (APS) and sodium hypochlorite] in an acidic aqueous solution [17]. 

Cu nanoparticles were successfully incorporated within PVA nanofibers through an in situ deoxidization approach starting from ChiCl2 [7]. PVA-protected copper nanoparticles and copper nanowires were generated inside the electrospun fibers. It was found that the molar ratio of copper ions to VA units played an important role in the formation of the copper/PVA nanocables [7]. 

RA. Sheikh, M.A. Kanjwal, S. Saran, W.-J. Chung, H. Kim, Polyurethane nanofibers containing copper nanoparticles as future materials, Appl. Surf. Sci. 257 (2011) 3020-3026. 

Additives used in flnai products alumina, attapulgite, boron nitride, bronze powder, carbon black, carbon fiber, carbon nanofiber, copper powder, diamond, glass fiber, graphite, molybdenum sulfide, Ni-Zn ferrite, silica, titanium dioxide ... 

Figure 13.10 Electrochemical cell setup (a) copper wire, (b) silver epoxy, (c) glass slide, and (d) conducting nanofiber mat RE reference electrode, AE auxiliary electrode, WE working electrode...

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

The possibihty of using carbon fibers as hydrogen-adsorbing materials for power sonrces was demonstrated by Danilov et al., (2008). Activation of the nanofibers in melted KOH resulted in increasing their specific snrface area from an initial 300 to 400 m /g to 1700 m /g. Deposition of copper improved the electrochemical storage characteristics. 

Wei et al. prepared electrospun PU nanofibers [144], randomly oriented, forming a highly porous structure. The surface morphology of pure PU nanofibers was smooth and uniform, with an average diameter of 500 nm. They metalized these fibers with copper layer, which ranges from 10 to 100 nm. They observed that the thermal decomposition behavior of metalized hybrid PU nanofibers was altered compared to the pure PU nanofibers (Figure 7.6). 

That is, the thermal degradation of metalized hybrid PU nanofibers was extended to higher temperature, suggesting the suppression of thermal decomposition due to the protective copper layer deposited on the surface of nanofibers. In addition, the degradation patterns of metalized hybrid PU nanofibers are different from pure PU... 

Figure 7.6 Thermogravimetric analysis of pure PU (a) and metalized hybrid PU nanofibers with diflferent copper layers of 10 (b), 50 (c), and 100 nm (d). A heating rate of 208C/min was placed to samples in a nitrogen environment. The inset shows field emission scanning electron microscopy (FE-SEM) image at higher magnification of metalized hybrid nanofiber with the copper layer of 100 nm. Reprint with permission of Willey [144],...

To examine an individual nanofiber, transmission electron microscopy (TEM) was conducted. The TEM samples were prepared by using copper grid for collecting... 

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