01590nas a2200217   4500008004100000022001400041245006700055210006500122260011000187300001400297490000700311520080700318100002201125700001801147700002601165700002201191700001601213700003001229700002001259856009301279       2014                        eng d  a1144-054600aFacile method for the synthesis of Co-core Au-shell nanohybrid0 aFacile method for the synthesis of Cocore Aushell nanohybrid  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcSEP  a4107-41140 v383 a<p>Heterostructured Co-Au core-shell nanoparticles have been synthesized by reducing AuCl4- ions on cobalt nanoparticles after a minor but effective modification of cobalt surface by an amine. The core shell morphology is emphatically confirmed by thorough investigation through UV-Vis spectroscopy, X-ray photoelectron spectroscopy (XPS), and transmission electron microscopic analysis (TEM). The chemical composition and topography were determined using STEM-HAADF analysis and EFTEM imaging. Fourier transform infrared (FTIR) spectroscopy confirms the surface modification of Co nanoparticles and the interactions involved between the ligands and the core and shell metals at various steps of the synthetic process. The magnetic properties confirm the material to be superparamagnetic in nature.</p>1 aSardar, Debasmita1 aNeogi, S., K.1 aBandyopadhyay, Sanjoy1 aSatpati, Biswarup1 aJain, Ruchi1 aGopinath, Chinnakonda, S.1 aBala, Tanushree  uhttps://library.ncl.res.in/content/facile-method-synthesis-co-core-au-shell-nanohybrid-002032nas a2200241   4500008004100000022001400041245008300055210006900138260011000207300001400317490000700331520114000338100002201478700001801500700002601518700002201544700001801566700002101584700001601605700003001621700002001651856011901671       2015                        eng d  a1144-054600aMultifaceted core-shell nanoparticles: superparamagnetism and biocompatibility0 aMultifaceted coreshell nanoparticles superparamagnetism and bioc  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcAUG  a8513-85210 v393 a<p>NicoreAgshell nanoparticles were synthesized by redox transmetallation reaction. Reduction potential match was encouraging to attempt the synthesis of the NicoreAushell system too. However, it could be achieved only after an effective surface modification on the Ni-core. Thorough characterization (UV-Vis spectroscopy, fluorescence spectroscopy, XRD, XPS, FTIR, TEM, and EDX) proved the necessity of surface modification and the success of synthesis of both types of core-shell structures. The chemical composition and topography were determined using STEM-HAADF analysis and EFTEM imaging. Fourier transform infrared (FTIR) spectroscopy confirmed the surface modification of Ni nanoparticles and the interactions involved between the ligands and metals (in the core and/or the shell) at various steps of the synthetic process. Even after the formation of the noble metal shell, the magnetic core was found to retain its superparamagnetic nature. In addition, the Au-shell protected the core from aerial oxidation and decreased toxicity as compared to pristine Ni nanoparticles as observed by MTT assay on normal cells (PBMCs).</p>1 aSardar, Debasmita1 aNeogi, S., K.1 aBandyopadhyay, Sanjoy1 aSatpati, Biswarup1 aAhir, Manisha1 aAdhikary, Arghya1 aJain, Ruchi1 aGopinath, Chinnakonda, S.1 aBala, Tanushree  uhttps://library.ncl.res.in/content/multifaceted-core-shell-nanoparticles-superparamagnetism-and-biocompatibility-001448nas a2200181   4500008004100000245007700041210006900118260000800187300002700195490000600222520081200228100002201040700001801062700002701080700003001107700002001137856010901157       2017                        eng d00aFacile synthesis of ZnO-Ag nanocomposite and its photocatalytic activity0 aFacile synthesis of ZnOAg nanocomposite and its photocatalytic a  cMAY  aArticle Number: 0550110 v43 a<p>The evolution of photoactive hybrid materials (e.g. noble metal-semiconductor) has resulted in heterogeneous photocatalysis. We report a facile route for the synthesis of ZnO-Ag nanocomposites with varying percentage of loading of the noble metal, expecting a great boost in the photocatalytic behavior of ZnO. The as prepared material was thoroughly characterized by UV-Vis, FTIR, TEM, FESEM, XRD, XPS analyses. The photocatalytic activities of the nanocomposites have been assessed from the ability to degrade methylene blue dye in aqueous solution. The results suggest that incorporation of Ag nanoparticles on the surface of ZnO particles can enhance catalytic activity in comparison to pure ZnO particles under visible light by minimizing the recombination of photogenerated electron-hole pairs.</p>1 aSardar, Debasmita1 aMaity, Jayeta1 aGhosalya, Manoj, Kumar1 aGopinath, Chinnakonda, S.1 aBala, Tanushree  uhttps://library.ncl.res.in/content/facile-synthesis-zno-ag-nanocomposite-and-its-photocatalytic-activity01720nas a2200205   4500008004100000245013500041210006900176260000800245520093500253100002201188700002401210700002001234700001901254700001801273700002601291700001601317700003001333700002001363856013101383       2017                        eng d00aMultiple functionalities of Ni nanoparticles embedded in carboxymethyl guar gum polymer: catalytic activity and superparamagnetism0 aMultiple functionalities of Ni nanoparticles embedded in carboxy  cJAN3 aComposites comprising of metallic nanoparticles in polymer matrices have allured significant importance due to multifunctionalities. Here a simple protocol has been described to embed Ni nanoparticles in carboxymethyl guar gum (CMGG) polymer. The composite formation helps in the stabilization of Ni nanoparticles which are otherwise prone towards aerial oxidation. Further the nanoparticles retain their superparamagnetic nature and catalytic capacity. Ni-Polymer composite catalyses the reduction of 4-Nitrophenol to 4-Aminophenol very efficiently in presence of NaBH4, attaining a complete conversion under some experimental conditions. Ni-Polymer composite is well characterized using UV–vis spectroscopy, FTIR, XPS, powder XRD, TGA, SEM and TEM. A detailed magnetic measurement using superconducting quantum interference device-vibrating sample magnetometer (SQUID-VSM) reveals superparamagnetic behaviour of the composite.1 aSardar, Debasmita1 aSengupta, Manideepa1 aBordoloi, Ankur1 aAhmed, Md., A.1 aNeogi, S., K.1 aBandyopadhyay, Sanjoy1 aJain, Ruchi1 aGopinath, Chinnakonda, S.1 aBala, Tanushree  uhttps://library.ncl.res.in/content/multiple-functionalities-ni-nanoparticles-embedded-carboxymethyl-guar-gum-polymer-catalytic01457nas a2200193   4500008004100000022001400041245011500055210006900170260000800239300001700247490000700264520073800271100002201009700002601031700002701057700002701084700002001111856013201131       2018                        eng d  a1144-054600a Organic phase transmetallation approach for synthesis of hollow Ni-Au nanocomposites with tunable cavity size0 aOrganic phase transmetallation approach for synthesis of hollow   cDEC  a 19615-196240 v423 a<p>Ni-Au nanocomposites in the form of hollow spheres with controlled cavity size have been successfully synthesized by the transmetallation reaction between hydrophobized Ni nanoparticles and hydrophobized Au precursors. This can be considered as a fairly unique synthesis strategy that does not require any additional external reductants. The synthesis is carried out in a nonpolar solvent and precise tuning of the cavity size has been achieved only by varying the ratio of the two reacting components. A detailed characterization has been performed via UV-vis spectroscopy, XPS, TEM, EDAX, and SEM. The mechanistic aspect is established from FTIR. SQUID-VSM confirmed the magnificent superparamagnetism of the nanocomposites.</p>1 aSardar, Debasmita1 aAhmed, Md, Azaharuddi1 aBandyopadhyay, Sudipta1 aGhosalya, Manoj, Kumar1 aBala, Tanushree  uhttps://library.ncl.res.in/content/organic-phase-transmetallation-approach-synthesis-hollow-ni-au-nanocomposites-tunable-cavity01700nas a2200265   4500008004100000022001400041245012000055210006900175260000900244300001400253490000600267520079100273653002901064653001401093653001801107653002901125653002501154100001801179700002601197700002201223700002201245700002701267700002001294856012001314       2019                        eng d  a2365-654900aDexterous route for synthesis of hollow spherical ZnO and ZnO-Ag nanocomposite with superior photocatalytic ability0 aDexterous route for synthesis of hollow spherical ZnO and ZnOAg   cMAY   a5518-55260 v43 a<p>Hollow spherical ZnO and hollow ZnO-Ag nanocomposites with variable percentage of loading of Ag content were successfully fabricated through a novel, template free and easily reproducible route. Extensive characterizations were carried out using FTIR, XRD, XPS, BET, TEM and SEM. The hollow morphology of the particle and the composite encouraged a detailed photocatalysis study in comparison to solid commercial ZnO and the corresponding ZnO-Ag composite. The photocatalytic activity of the hollow particle and the composite was assessed monitoring the decolouration of methylene blue dye using UV-Vis absorption spectroscopic technique. An increased surface area for hollow morphology as compared to solid particles established a conspicuous boost in photocatalytic activity.</p>
10aexcellent photocatalysis10asynthesis10atemplate free10aZnO hollow nanoparticles10aZnO-Ag nanocomposite1 aMaity, Jayeta1 aBhattacharjee, Gourab1 aSatpati, Biswarup1 aSardar, Debasmita1 aGhosalya, Manoj, Kumar1 aBala, Tanushree  uhttps://library.ncl.res.in/content/dexterous-route-synthesis-hollow-spherical-zno-and-zno-ag-nanocomposite-superior