01815nas a2200253   4500008004100000022001400041245013700055210006900192260007300261300001000334490000800344520087200352653001701224653001401241653002401255653001401279653002301293100002701316700002501343700002401368700002101392700002201413856012601435       2010                        eng d  a0921-510700aInfluence of filler size and morphology in controlling the thermal emissivity of aluminium/polymer composites for space applications0 aInfluence of filler size and morphology in controlling the therm  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR  a40-440 v1683 a<p>The paper has addressed the problem of controlling the thermal emissivities from metal/polymer composites prepared by solution method. Aluminium is used as a filler and polystyrene as a polymer-matrix. Aluminium particles, with micrometer and nanometer dimensions having different morphologies, were employed. The values of emissivities were reduced when the coarse grains and flakes of aluminium were used as fillers, whereas, no significant change was observed when nano-aluminium was used in the composite. Dielectric dispersion for the composites was measured and the results are analysed in view of Fresnel relation. The differences in the values of dielectric constants, between the experimentally measured and those which can be predicted theoretically, are thought to arise from the interfacial polarization. (C) 2009 Elsevier B.V. All rights reserved.</p>10aCamouflaging10aComposite10adielectric constant10aInfra-red10aThermal emissivity1 aBabrekar, Harshada, A.1 aKulkarni, Naveen, V.1 aJog, Jyoti, Prakash1 aMathe, Vikas, L.1 aBhoraskar, S., V.  uhttps://library.ncl.res.in/content/influence-filler-size-and-morphology-controlling-thermal-emissivity-aluminiumpolymer-001732nas a2200241   4500008004100000022001400041245010800055210006900163260007300232300001400305490000800319520084300327653002801170653002301198653001501221653001501236100002701251700002201278700002401300700001701324700002201341856012701363       2011                        eng d  a0169-433200aLow thermal emissive surface properties of ZnO/polyimide composites prepared by pulsed laser deposition0 aLow thermal emissive surface properties of ZnOpolyimide composit  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJAN  a1824-18280 v2573 a<p>We report the low thermal-emissive surface properties of composites of ZnO-polyimide. The composites were synthesized by depositing ZnO on polyimide surface by pulsed laser deposition technique. ZnO target was ablated at different incident energy densities and the substrate (polyimide) was held at elevated temperature. This facilitated the c-axis oriented growth of ZnO, which was inferred from the X-ray diffraction analysis. The composites consisted of multilayers having different electrical resistivities. The values of which are also estimated from Hagen-Rubens relation. The reduced infrared emissivities of the composite films, as compared to polyimide, were correlated to the increased carrier concentration and reduced surface resistivity estimated from the Hall measurements. (C) 2010 Elsevier B.V. All rights reserved.</p>10apulsed laser deposition10aThermal emissivity10aThin films10aZinc oxide1 aBabrekar, Harshada, A.1 aJejurikar, S., M.1 aJog, Jyoti, Prakash1 aAdhi, K., P.1 aBhoraskar, S., V.  uhttps://library.ncl.res.in/content/low-thermal-emissive-surface-properties-znopolyimide-composites-prepared-pulsed-laser-001715nas a2200217   4500008004100000022001400041245012600055210006900181260011000250300001400360490000600374520083200380100002301212700001801235700002701253700002101280700002201301700001701323700003001340856012701370       2011                        eng d  a2040-336400aSilver nanoparticle studded porous polyethylene scaffolds: bacteria struggle to grow on them while mammalian cells thrive0 aSilver nanoparticle studded porous polyethylene scaffolds bacter  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUN  a2957-29630 v33 a<p>Silver nanoparticle studded scaffolds were prepared by exploiting the Ag+ ion reducing activity of sophorolipids-a class of `glycolipids' that cap the ensuing nanoparticles as well. To achieve this, the porous polyethylene scaffolds are subjected to N-2+H-2 plasma treatment, in the first step. Subsequently the sophorolipids are covalently attached to the amine groups on the polymer surface through simple amide chemistry to yield sophorolipid grafted polymer scaffolds. These are then exposed to Ag+ ions under appropriate conditions leading to the formation of silver nanoparticles immobilized on the polymer scaffolds. It has been found that while bacteria do not survive on these silver studded scaffolds, CHO-K1 cells thrive on them making them good candidates for tissue engineering and bio-implant applications.</p>1 aD'Britto, Virginia1 aKapse, Harsha1 aBabrekar, Harshada, A.1 aPrabhune, Asmita1 aBhoraskar, S., V.1 aPremnath, V.1 aPrasad, Bhagavatula L. V.  uhttps://library.ncl.res.in/content/silver-nanoparticle-studded-porous-polyethylene-scaffolds-bacteria-struggle-grow-them-001338nas a2200253   4500008004100000022001400041245011100055210006900166260007300235300001200308490000800320520042000328653001500748653002400763653002000787653002300807100002700830700002400857700002100881700002000902700001300922700002200935856012700957       2012                        eng d  a0168-583X00aSwift heavy ion induced formation of Al/polymer composite layer for low thermal emissivity in the IR range0 aSwift heavy ion induced formation of Alpolymer composite layer f  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcSEP  a135-1400 v2873 a<p>Composites of polymers with aluminium were formed by swift high energy ions of 150 MeV, which are used as low thermal emissivity materials for infrared wavelengths between 8-14 mu m. Emissivity and dielectric constants were studied for these structures. A semi-empirical model has been established to obtain the relation between emissivity and dielectric constant. (C) 2012 Elsevier B.V. All rights reserved.</p>10acomposites10adielectric constant10aSwift heavy ion10aThermal emissivity1 aBabrekar, Harshada, A.1 aJog, Jyoti, Prakash1 aMathe, Vikas, L.1 aAvasthi, D., K.1 aOjha, S.1 aBhoraskar, S., V.  uhttps://library.ncl.res.in/content/swift-heavy-ion-induced-formation-alpolymer-composite-layer-low-thermal-emissivity-ir-0