01863nas a2200229   4500008004100000022001400041245008100055210006900136260006900205300001200274490000800286520103800294653002401332653002601356653001501382653002401397100002701421700002501448700001901473700003301492856010801525       2010                        eng d  a0254-058400aOn the magnetic and dielectric properties of nickel-neoprene nanoconaposites0 amagnetic and dielectric properties of nickelneoprene nanoconapos  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcMAY  a154-1600 v1213 a<p>Nickel nanocomposites were prepared by incorporating nickel nanoparticles in a neoprene matrix according to a specific recipe for various loadings of nickel particles. The dielectric properties of these composites were evaluated for different frequencies ranging from 100 kHz to 8 MHz at different temperatures from 30 degrees C to 120 degrees C. The dielectric permittivity increases with increase of nickel concentration. Increase in temperature enhances the permittivity initially, till 40 degrees C and thereafter the permittivity decreases. The dielectric loss exhibits relaxation peaks and the peaks shift to lower frequencies with increase in volume fraction of the nickel nanoparticles in the matrix. The evaluation of magnetic and dielectric properties of these composites suggests that the dielectric permittivity can be tailored by an appropriate loading of the filler using semi-empirical equations and the magnetic properties vary according to simple mixture equations. (C) 2010 Elsevier B.V. All rights reserved.</p>10aComposite materials10adielectric properties10aElastomers10amagnetic properties1 aJamal, Muhammad, Abdul1 aJoy, Pattayil, Alias1 aKurian, Philip1 aAnantharaman, Maliemadom, R.  uhttps://library.ncl.res.in/content/magnetic-and-dielectric-properties-nickel-neoprene-nanoconaposites-002605nas a2200265   4500008004100000022001400041245018700055210006900242260006900311300001200380490000800392520159400400653002401994653002602018653001202044653001502056100001902071700001902090700002402109700002102133700001802154700001802172700001802190856013102208       2014                        eng d  a0254-058400aPoly (3,4-ethylenedioxythiophene) (PEDOT) and poly (3,4-ethylenedioxythiophene)-few walled carbon nanotube (PEDOT-FWCNT) nanocomposite based thin films for Schottky diode application0 aPoly 34ethylenedioxythiophene PEDOT and poly 34ethylenedioxythio  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcOCT  a867-8770 v1473 a<p>Transparent, conductive films of poly (3,4-ethylenedioxythiophene) (PEDOT) and poly (3,4-ethylenedioxythiophene)-few walled carbon nanotube (PEDOT-FWCNT) nanocomposite were synthesized by in-situ oxidative polymerization and investigated for their Schottky diode property. The prepared films were characterized by UV-Vis spectroscopy, thermal gravimetric analysis (TGA), surface resistivity, cyclic voltametery, scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM). SEM reveals the formation of homogeneous and adhesive polymer films while HRTEM confirms the uniform wrapping of polymer chains around the nanotube walls for PEDOT-FWCNT film. Improved thermal stability, conductivity and charge storage property of PEDOT in the presence of FWCNT is observed. Among different compositions, 5 wt. % of FWCNT is found to be optimum with sheet resistance and transmittance of 500 Omega sq(-1) and 77%, respectively. Moreover, the electronic and junction properties of polymer films were studied and compared by fabricating sandwich type devices with a configuration of Al/PEDOT or PEDOT-FWCNT nanocomposite/indium tin oxide (ITO) coated glass. The measured current density-voltage characteristics show typical rectifying behavior for both configurations. However, enhanced rectification ratio and higher forward current density is observed in case of PEDOT-FWCNT based Schottky diode. Furthermore, reliability test depicts smaller hysteresis effect and better performance of PEDOT-FWCNT based diodes. (C) 2014 Elsevier B.V. All rights reserved.</p>10aComposite materials10aElectrical properties10aPolymer10aThin films1 aGupta, Bhavana1 aMehta, Minisha1 aMelvin, Ambrose, A.1 aKamalakannan, R.1 aDash, Sitaram1 aKamruddin, M.1 aTyagi, A., K.  uhttps://library.ncl.res.in/content/poly-34-ethylenedioxythiophene-pedot-and-poly-34-ethylenedioxythiophene-few-walled-carbon-002103nas a2200241   4500008004100000022001400041245017400055210006900229260000800298300001400306490000600320520118800326653001401514653002101528653002401549653001501573653002901588100003101617700002801648700003001676700002401706856013101730       2017                        eng d  a2196-021600aSingle cell fabrication towards the realistic evaluation of a CNT-strung ZIF-derived electrocatalyst as a cathode material in alkaline fuel cells and metal-air batteries0 aSingle cell fabrication towards the realistic evaluation of a CN  cNOV  a2928-29330 v43 a<p>The development of an electrocatalyst possessing all the vital requisites of an ideal electrode material, such as high porosity, high conductivity, and high intrinsic electrochemical activity, holds a decisive key in determining the activity of the triplephase boundary in many energy devices like fuel cells and metal-air battery systems. In the present work, highly porous cobalt-based ZIFs are strung along the highly conducive CNT backbone by using a simple one-pot technique at room temperature, which is then utilized to derive a porous, corrosion-resistant, Co nanoparticle-embedded electrocatalyst. Herein, for the first time, the single cell performance of the Co-ZIF-67-derived electrocatalyst has been evaluated by fabricating membrane electrode assemblies of alkaline exchange membrane fuel cell (AEMFC) and zinc-air battery (ZAB) systems. A maximum power density of 296 mW/cm(2) (vs. 317 mW/cm(2) for 40 wt.% Pt/C) and 60 mW/cm(2) (vs. 64 mW/cm(2) for 40 wt.% Pt/C) in the single cells of ZAB and AEMFC systems, respectively, establishes the practical proficiency of the homemade electrocatalyst for cathode applications during realistic system-level validations.</p>10aBatteries10aCarbon nanotubes10aComposite materials10afuel cells10ametal-organic frameworks1 aAiyappa, Harshitha, Barike1 aBhange, Siddheshwar, N.1 aSivasankaran, Vijitha, P.1 aKurungot, Sreekumar  uhttps://library.ncl.res.in/content/single-cell-fabrication-towards-realistic-evaluation-cnt-strung-zif-derived-electrocatalyst01418nas a2200193   4500008004100000022001400041245010400055210006900159260000900228300001200237490000800249520074400257653001301001653002401014653002301038100002701061700001601088856012001104       2019                        eng d  a0167-577X00aLarge enhancement in the magnetostriction parameters of the composite of CoFe2O4 and CoFe1.9Ga0.1O40 aLarge enhancement in the magnetostriction parameters of the comp  cFEB   a303-3060 v2363 a<p>A new strategy to enhance the magnetostriction parameters of cobalt ferrite (CoFe2O4) is illustrated. A composite comprising of nanocrystalline CoFe2O4 and bulk CoFe(1.9)Ga(0.1)O(4 )powders were mixed together then compacted and sintered at 1450 degrees C for 10 min. For a composite of 70 wt% CoFe2O4 and 30 wt% of CoFe(1.9)Ga(0.1)O4, maximum magnetostriction coefficient (lambda(max)) of -350 ppm has been obtained at lower magnetic field which is nearly 20% and 65% higher than that obtained for CoFe2O4 and CoFe1.9Ga0.1O4, respectively. Moreover, the composite exhibited higher strain sensitivity [d lambda/dH](max )of -2.6 x 10 (9) A(-1) m against the individual components of the composite. (C) 2018 Published by Elsevier B.V.</p>10aCeramics10aComposite materials10aMagnetic materials1 aAnantharamaiah, P., N.1 aJoy, P., A.  uhttps://library.ncl.res.in/content/large-enhancement-magnetostriction-parameters-composite-cofe2o4-and-cofe19ga01o4