01658nas a2200277   4500008004100000022001400041245006700055210006600122260007300188300001000261490000800271520076700279653001501046653001701061653001801078653001801096653001401114653003501128100002301163700001901186700002201205700001401227700002001241700002101261856009801282       2005                        eng d  a0022-231300aPhotoluminescent core-shell particles of organic dye in silica0 aPhotoluminescent coreshell particles of organic dye in silica  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUL  a15-230 v1143 a<p>Using a single silica precursor, Rhodamine 6G organic dye molecules have been entrapped in silica particles resulting into core-shell particles of similar to 500 nm diameter. Energy dispersive X-ray analysis, X-ray photoelectron spectroscopy and transmission electron microscopy analysis reveals that dye molecules are trapped inside the silica particles. Photoluminescence investigations show that highly luminescent and photostable core-shell particles are formed. Such core-shell particles can be easily suspended in water and would be useful for a variety of applications. However, there is a blue shift in the photolumineseence wavelength in case of core-shell particles compared to bare dye powder sample. (c) 2004 Elsevier B.V. All rights reserved.</p>10acore-shell10aLuminescence10aNanoparticles10aphotoemission10aRH06G dye10atetraethylorthosilicate (TEOS)1 aEthiraj, Anita, S.1 aHebalkar, Neha1 aKharrazi, Sharmin1 aUrban, J.1 aSainkar, S., R.1 aKulkarni, S., K.  uhttps://library.ncl.res.in/content/photoluminescent-core-shell-particles-organic-dye-silica-001445nas a2200265   4500008004100000022001400041245005800055210005700113260007300170300001400243490000700257520060300264653001500867653001900882653001700901653001900918653002800937100002300965700002200988700001901010700001401029700002001043700002101063856009501084       2007                        eng d  a0167-577X00aHighly photostable dye entrapped core-shell particles0 aHighly photostable dye entrapped coreshell particles  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcOCT  a4738-47420 v613 a<p>Organic dye namely Coumarin 7 has been entrapped in silica particles using a single silica precursor viz. tetraethylorthosilicate. Both bare Coumarin 7 dye and dye incorporated core-shell particles were studied. Investigations of these core-shell composites were carried out using different characterization techniques such as energy dispersive X-ray analysis, X-ray photoelectron spectroscopy and transmission electron microscopy. It has been shown that the photostability of dye molecules is improved along with an increase in photoluminescence. (c) 2007 Elsevier B.V. All rights reserved.</p>10acore-shell10acoumarin 7 dye10aLuminescence10aphotostability10atetraethylorthosilicate1 aEthiraj, Anita, S.1 aKharrazi, Sharmin1 aHebalkar, Neha1 aUrban, J.1 aSainkar, S., R.1 aKulkarni, S., K.  uhttps://library.ncl.res.in/content/highly-photostable-dye-entrapped-core-shell-particles-002132nas a2200253   4500008004100000022001400041245017900055210006900234260007300303300001400376490000800390520117100398653000801569653001301577653001501590653001801605653002201623653000801645100002101653700002701674700002401701700002501725856012801750       2007                        eng d  a0927-775700aInvestigating organization of molecules that facilitates intermolecular acyl transfer in crystals: reactivity and x-ray structures of O-benzoyl-myo-inositol 1,3,5-orthoesters0 aInvestigating organization of molecules that facilitates intermo  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcFEB  a1153-11590 v2933 a<p>{Crystal structure analysis of racemic 2,6-di-O-benzoyl-myo-inositol 1,3,5-orthobenzoate reveals helical organization of the molecules, remarkably similar to that observed earlier in crystals of racemic 2,6-di-O-benzoyl-myo-inositol 1,3,5-orthoformate. Both these dibenzoates are isostructural despite the bulkier phenyl substituent in place of hydrogen. The latter compound shows highly facile intermolecular benzoyl transfer reactivity in its crystals and as anticipated from the crystal structure, the orthobenzoate indeed exhibits facile benzoyl transfer reactivity in its crystals. 2-O-Benzoyl-myo-inositol 1,3,5-orthoformate and the corresponding orthobenzoate also undergo transesterification in their crystals, but the specificity of acyl transfer is very low, and the reaction yields a mixture of products. The parameters of helical molecular assembly that facilitates acyl transfer in crystals have been investigated. A comparison of the molecular assemblies and lattice interactions in crystals of all the four compounds with the observed reactivity patterns show that facile acyl transfer reaction is brought about by a modular ``reaction tunnel''</p>10aAOT10aCdS-Ag2S10acore-shell10aNanoparticles10aw/o microemulsion10aXPS1 aMurali, Chebrolu1 aShashidhar, Mysore, S.1 aGonnade, Rajesh, G.1 aBhadbhade, Mohan, M.  uhttps://library.ncl.res.in/content/investigating-organization-molecules-facilitates-intermolecular-acyl-transfer-crystals-002462nas a2200253   4500008004100000022001400041245010400055210006900159260005700228300001200285490000600297520161200303653001801915653001501933653001001948653000901958653001801967653001101985100001901996700002002015700001902035700002402054856013002078       2009                        eng d  a1557-195500aSilver fused conducting fiber formation of Au-Ag core-shell nanoparticles mediated by ascorbic acid0 aSilver fused conducting fiber formation of AuAg coreshell nanopa  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGERcJUN  a161-1700 v43 a<p>In this paper, we report the spontaneous formation of fibrous structures consisting of assemblies of Au-Ag core-shell nanoparticles (NPs) from a solution consisting of Au-Ag core-shell NPs and l-ascorbic acid (AA). AA acted both as the reducing agent for the generation of NPs and also as the mediator for the formation of fibers. The process of fiber formation involved three steps-reduction of HAuCl(4) to Au NPs by AA, subsequent formation of Au-Ag core-shell NPs after addition of AgNO(3), and spontaneous formation of fibers from the mixtures in water. It took typically about 30 days to form complete fibers that are of lengths of several hundred micrometers to millimeters, although nanofibers started forming from the first day of solution preparation. The width of each of these fibers was typically about 1-4 A mu m with length of each segment of fiber bundle, on the order of 40 A mu m. Formation of fibers was also observed in absence of AgNO(3). These fibers consisted of Au NPs and polymer of AA degradation products and were not electrically conducting. Also, low concentrations of AgNO(3) produced fibers with low electrical conductivity. However, it was observed that increase in the amount of AgNO(3) leads to the formation of fibers that were electrically conducting with conductivity values in the range of metallic conductivity. Spectroscopic and electron microscopic investigations were carried out to establish the formation of fibers. The details of fiber formation mechanism under different conditions and electrical conductivities of the fibers are discussed in the article.</p>10aAscorbic acid10acore-shell10aFiber10aGold10aNanoparticles10aSilver1 aMurugadoss, A.1 aKar, Manoranjan1 aPasricha, Renu1 aChattopadhyay, Arun  uhttps://library.ncl.res.in/content/silver-fused-conducting-fiber-formation-au-ag-core-shell-nanoparticles-mediated-ascorbic-001810nas a2200277   4500008004100000022001400041245010700055210006900162260007700231300001400308490000700322520084200329653001501171653001501186653002401201653001801225653002201243100002401265700001901289700001401308700002001322700003001342700001601372700002401388856012001412       2014                        eng d  a1439-423500aLarge magnetocaloric effect, moment, and coercivity enhancement after coating Ni nanoparticles with Ag0 aLarge magnetocaloric effect moment and coercivity enhancement af  aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcJUN  a1619-16230 v153 a<p>We observe a large magnetocaloric effect in monodisperse Ni and NicoreAgshell nanoparticles in the superparamagnetic region. The organically passivated Ni nanospheres show a large magnetic entropy change of 0.9 J kg(-1)K for a 3 T magnetic field change. In comparison to the surfactant-coated Ni nanoparticles, the NicoreAgshell nanoparticles show an enhanced coercivity, magnetization, and magnetocaloric effect (1.3 kgK for a 3 T magnetic field change). The coercivity at 10 K increases from 360 Oe for Ni nanoparticles to nearly 610 Oe for NicoreAgshell particles. This large enhancement is attributed to the enhanced inter-particle interaction, which is mediated by the metallic shell, over the relatively weaker dipolar interaction in the surfactant-coated Ni nanoparticles, and to modification of the surface spin structure.</p>10aanisotropy10acore-shell10amagnetic properties10aNanoparticles10asuperparamagnetic1 aSrinath, Sanyadanam1 aPoddar, Pankaj1 aDas, Raja1 aSidhaye, Deepti1 aPrasad, Bhagavatula L. V.1 aGass, James1 aSrikanth, Hariharan  uhttps://library.ncl.res.in/content/large-magnetocaloric-effect-moment-and-coercivity-enhancement-after-coating-ni-001705nas a2200277   4500008004100000022001400041245012400055210006900179260000900248300001100257490000800268520078900276653002101065653001501086653001101101653002001112653002401132653002701156100001901183700001901202700001601221700001601237700003001253700001801283856012601301       2019                        eng d  a0926-860X00aSurfactant free synthesis of Au@Ni core-shell nanochains in aqueous medium as efficient transfer hydrogenation catalyst0 aSurfactant free synthesis of AuNi coreshell nanochains in aqueou  cAPR   a93-1000 v5753 a<p>A surfactant free aqueous phase synthesis method is reported for the generation of highly lattice mismatched Au@Ni core-shell nanochains without using any expensive and hazardous organic ligands. As synthesised Au@Ni nanochain structures showed high thermal stability and bulk oxidation resistance up to 300 degrees C. In situ near ambient pressure XPS (NAPXPS) analysis has been done for the bare Au@Ni nanochain surfaces under oxygen atmosphere and at different temperatures which showed evidence for the surface oxidation resistance of naked Au@Ni nanochains up to 200 degrees C. Ligand or capping agent free Au@Ni nanochain surfaces are found to be highly active for transfer hydrogenation of acetophenone to 1-phenyl ethanol an important commodity in perfumery industry.</p>
10aAu@Ni nanochains10acore-shell10aNAPXPS10aSurfactant free10asynergistic effects10atransfer hydrogenation1 aVysakh, A., B.1 aShebin, K., J.1 aJain, Ruchi1 aSumanta, P.1 aGopinath, Chinnakonda, S.1 aVinod, C., P.  uhttps://library.ncl.res.in/content/surfactant-free-synthesis-auni-core-shell-nanochains-aqueous-medium-efficient-transfer02535nas a2200277   4500008004100000245020600041210006900247260000800316300001200324490000600336520152200342653001501864653002501879653001901904653002101923653002301944653002001967100002901987700002202016700001902038700001802057700002502075700001902100700001902119856011902138       2022                        eng d00aHigh-alkaline water-splitting activity of mesoporous 3D heterostructures: an amorphous-shell@crystalline-core nano-assembly of Co-Ni-phosphate ultrathin-nanosheets and V- doped cobalt-nitride nanowires0 aHighalkaline watersplitting activity of mesoporous 3D heterostru  cAUG  a22013110 v93 a<p>
	Introducing amorphous and ultrathin nanosheets of transition bimetal phosphate arrays that are highly active in the oxygen evolution reaction (OER) as shells over an electronically modulated crystalline core with low hydrogen absorption energy for an excellent hydrogen evolution reaction (HER) can boost the sluggish kinetics of the OER and HER in alkaline electrolytes. Therefore, in this study, ultrathin and amorphous cobalt-nickel-phosphate (CoNiPOx) nanosheet arrays are deposited over vanadium (V)-doped cobalt-nitride (V-3%-Co4N) crystalline core nanowires to obtain amorphous-shell@crystalline-core mesoporous 3D-heterostructures (CoNiPOx@V-Co4N/NF) as bifunctional electrocatalysts. The optimized electrocatalyst shows extremely low HER and OER overpotentials of 53 and 270 mV at 10 mA cm(-2), respectively. The CoNiPOx@V-3%-Co4N/NF (+/-) electrolyzer utilizing the electrocatalyst as both anode and cathode demonstrates remarkable overall water-splitting activity, requiring a cell potential of only 1.52 V at 10 mA cm(-2), 30 mV lower than that of the RuO2/NF (+)/20%-Pt/C/NF (-) electrolyzer. Such impressive bifunctional activities can be attributed to abundant active sites, adjusted electronic structure, lower charge-transfer resistance, enhanced electrochemically active surface area (ECSA), and surface- and volume-confined electrocatalysis resulting from the synergistic effects of the crystalline V-3%-Co4N core and amorphous CoNiPOx shells boosting water splitting in alkaline media.</p>
10acore-shell10ahydrogen productions10ametal nitrides10ametal phosphates10asynergistic effect10awater-splitting1 aSingh, Thangjam, Ibomcha1 aMaibam, Ashakiran1 aCha, Dun, Chan1 aYoo, Sunghoon1 aBabaRao, Ravichandar1 aLee, Sang, Uck1 aLee, Seunghyun  uhttps://library.ncl.res.in/content/high-alkaline-water-splitting-activity-mesoporous-3d-heterostructures-amorphous02189nas a2200277   4500008004100000022001400041245011600055210006900171260000900240300001100249490000800260520129600268653002201564653001301586653001501599653001501614653002001629653001301649100001901662700001901681700001701700700002501717700002201742700001801764856012901782       2022                        eng d  a1385-894700aProgress and potential of electrospinning-derived substrate-free and binder-free lithium-ion battery electrodes0 aProgress and potential of electrospinningderived substratefree a  cFEB   a1328760 v4303 aCarbon nanofibers derived from electrospun precursors show great promise for electronic applications owing to their flexibility, conductivity, high surface area, and open structure. The integration of metal oxides and sulfides in carbon nanofibers, rather than using them with other binders, eliminates many problems caused by poor adhesion, nanomaterial agglomeration, excess mass contributed by inactive binders, and low conductivity of embedded active materials. The engineering of electrospun fibers with novel morphologies, such as core-shell, hollow, or porous structures, and the use of decorated carbon nanofibers (e.g., by electrodeposition or co precipitation) are discussed in this review. Representative schematic illustrations of the lithium-storage mechanism for these binder-free electrodes are presented. We describe how the electrospinning technique can offer a cost-effective strategy for fabrication of lightweight lithium-ion batteries with high capacity and excellent bendability. This review presents the fascinating morphologies of these specially designed carbon nanofiber electrodes, which enhance the electrochemical performance of metal oxides and sulfides, illustrating their enormous potential for use in wearable electronic devices and hybrid electric vehicles.10aCarbon nanofibers10aCo-axial10acomposites10acore-shell10aelectrospinning10aFlexible1 aJoshi, Bhavana1 aSamuel, Edmund1 aKim, Yong-il1 aYarin, Alexander, L.1 aSwihart, Mark, T.1 aYoon, Sam, S.  uhttps://library.ncl.res.in/content/progress-and-potential-electrospinning-derived-substrate-free-and-binder-free-lithium-ion02650nas a2200301   4500008004100000022001400041245011700055210006900172260000900241300001100250490000800261520170500269653002201974653001301996653001502009653001502024653002002039653001302059653001102072653001902083100001902102700001902121700001702140700002502157700002202182700001802204856012602222       2022                        eng d  a0010-854500aReview of recent progress in electrospinning-derived freestanding and binder-free electrodes for supercapacitors0 aReview of recent progress in electrospinningderived freestanding  cJUN   a2144660 v4603 a<p>
	The versatile electrospinning technique is scalable and suitable to fabricate highly conducting freestanding carbon nanofiber composite electrodes for energy storage devices. Freestanding/flexible electrodes hold enormous potential for use in wearable electronic devices. Carbon-yielding polymers and the optimal use of sacrificial polymers, metal oxides, and sulfides retain the flexibility and enhance the surface area and pseudocapacitance of electrodes. Both as-prepared electrospun fibers and carbonized nanofibers are compatible with surface decoration via various chemical and electrochemical routes. Metal oxides/sulfides with various morphologies, such as nanocones and nanosheets, can be grown on the carbon nanofibers or on the as-prepared electrospun fibers using chemical synthesis methods such as electro-deposition, hydrothermal processes, and chemical impregnation to enhance the pseudocapacitance of the electrodes. Similarly, the deposition of metal organic frameworks on as-prepared electrospun fibers embellishes these fibers with nanostructures of specific morphologies such as dodecahedral and spindle-shaped structures. Under optimal conditions, these morphologies do not hamper the flexibility of the fibers, and binders are not required to retain them or maintain the electrode integrity. The engineering of electrodes with various morphologies and process parameters is presented systematically. Electrospinning-derived electrodes that have demonstrated significant electrochemical performance are highlighted and critically analyzed, and the energy storage mechanisms of these supercapacitors are described in detail. (C) 2022 Elsevier B.V. All rights reserved.</p>
10aCarbon nanofibers10aCo-axial10acomposites10acore-shell10aelectrospinning10aFlexible10aPorous10asupercapacitor1 aJoshi, Bhavana1 aSamuel, Edmund1 aKim, Yong-il1 aYarin, Alexander, L.1 aSwihart, Mark, T.1 aYoon, Sam, S.  uhttps://library.ncl.res.in/content/review-recent-progress-electrospinning-derived-freestanding-and-binder-free-electrodes