01429nas a2200217 4500008004100000022001400041245005400055210005400109260008700163300001100250490000800261520069400269100002300963700002300986700002301009700002301032700001801055700002401073700002601097856008801123 2014 eng d a0003-695100aField emission properties of ZnO nanosheet arrays0 aField emission properties of ZnO nanosheet arrays a1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USAbAMER INST PHYSICScDEC a2331010 v1053 a

{Electron emission properties of electrodeposited ZnO nanosheet arrays grown on Indium tin oxide coated glass substrates have been studied. Influence of oxygen vacancies on electronic structures and field emission properties of ZnO nanosheets are investigated using density functional theory. The oxygen vacancies produce unshared d electrons which form an impurity energy state; this causes shifting of Fermi level towards the vacuum, and so the barrier energy for electron extraction reduces. The ZnO nanosheet arrays exhibit a low turn-on field of 2.4 V/mu m at 0.1 mu A/cm(2) and current density of 50.1 mu A/cm(2) at an applied field of 6.4 V/mu m with field enhancement factor

1 aNaik, Kusha, Kumar1 aKhare, Ruchita, T.1 aChakravarty, Disha1 aMore, Mahendra, A.1 aThapa, Ranjit1 aLate, Dattatray, J.1 aRout, Chandra, Sekhar uhttps://library.ncl.res.in/content/field-emission-properties-zno-nanosheet-arrays-001498nas a2200169 4500008004100000245007000041210006900111260000800180300001200188490000600200520092700206100002401133700002601157700002301183700002001206856010201226 2015 eng d00aEmerging energy applications of two-dimensional layered materials0 aEmerging energy applications of twodimensional layered materials cMAR a118-1570 v33 a

Atomically thin semiconducting transition metal dichalcogenides (TMDCs) layered materials have recently been emerged as an exciting area of research due to accessibility for easy synthesis using various chemical and physical methods. These two-dimensional (2D) layered materials with single layer have direct and wide band gap due to which, they are more suitable for nanoelectronics and optoelectronics device applications. Here, we present a review of the energy related aspects of atomically thin layered materials like MoS2, WS2, MoSe2, WSe2, InSe, GaSe, GaTe, MoTe2, WTe2 etc. for supercapacitor, solar cell, lithium ion battery and water splitting application. By significantly assessing various materials and comparing their performances with challenging technology, the advantages and disadvantages of this promising area of energy materials are recognized, which may provide guidelines for future progress.

1 aLate, Dattatray, J.1 aRout, Chandra, Sekhar1 aChakravarty, Disha1 aRatha, Satyajit uhttps://library.ncl.res.in/content/emerging-energy-applications-two-dimensional-layered-materials01915nas a2200217 4500008004100000022001400041245013600055210006900191260007700260300001400337520106100351653001801412653002101430653002201451653001501473653001901488653001301507100002301520700002401543856013001567 2015 eng d a1434-194800aExfoliation of bulk inorganic layered materials into nanosheets by the rapid quenching method and their electrochemical performance0 aExfoliation of bulk inorganic layered materials into nanosheets  aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcAPR a1973-19803 a

We report herein the results of our investigations on the synthesis of transition-metal dichalcogenide (TMDC) semiconductor layered materials of MoS2, WS2, MoSe2, and WSe2 by the rapid quenching method. The bulk powders were added to deionized water in a polypropylene tube and subsequently flushed with argon gas. Thirty rapid freezing (30 s in a liquid nitrogen bath) and heating (20 min in an oil bath at 60 degrees C) cycles were then carried out. The reaction product was obtained in a yield in excess of 60 wt.-%, which indicates that the method can be utilized on an industrial scale for the production of 2D nanosheets. The as-synthesized products were then characterized by TEM, which revealed nanosheet-like morphologies. Raman spectroscopy confirmed the high quality of the nanosheet samples. The exfoliated samples also showed good electrochemical performance. Of the TMDC samples investigated, the WSe2 nanosheets were found to give the best performance due to their uniform morphology, large surface area, and fewest number of defects.

10achalcogenides10aElectrochemistry10aLayered compounds10aMolybdenum10aNanostructures10aTungsten1 aChakravarty, Disha1 aLate, Dattatray, J. uhttps://library.ncl.res.in/content/exfoliation-bulk-inorganic-layered-materials-nanosheets-rapid-quenching-method-and-their-001555nas a2200229 4500008004100000022001400041245010200055210006900157260006700226300001400293490000700307520071500314653001201029653000901041653002601050653001901076653002701095100002301122700002401145700002401169856013201193 2015 eng d a0022-514200aGraphene quantum dots as enhanced plant growth regulators: effects on coriander and garlic plants0 aGraphene quantum dots as enhanced plant growth regulators effect a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcOCT a2772-27780 v953 a

BACKGROUNDWe report investigations on the use of graphene quantum dots for growth enhancement in coriander (Coriandrum sativam L.) and garlic (Allium sativum) plants. The as-received seeds of coriander and garlic were treated with 0.2 mg mL(-1) of graphene quantum dots for 3 h before planting. RESULTSGraphene quantum dots enhanced the growth rate in coriander and garlic plants, including leaves, roots, shoots, flowers and fruits, when the seeds were treated with graphene quantum dots. CONCLUSIONOur investigations open up the opportunity to use graphene quantum dots as plant growth regulators that can be used in a variety of other food plants for high yield. (c) 2015 Society of Chemical Industry

10afarming10afood10agraphene quantum dots10ananotechnology10aplant growth regulator1 aChakravarty, Disha1 aErande, Manisha, B.1 aLate, Dattatray, J. uhttps://library.ncl.res.in/content/graphene-quantum-dots-enhanced-plant-growth-regulators-effects-coriander-and-garlic-plants-001470nas a2200157 4500008004100000022001400041245010500055210006900160260011000229300001600339490000600355520078500361100002301146700002401169856011901193 2015 eng d a2046-206900aMicrowave and hydrothermal syntheses of WSe2 micro/nanorods and their application in supercapacitors0 aMicrowave and hydrothermal syntheses of WSe2 micronanorods and t aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB a21700-217090 v53 a

WSe2 micro/nanorods were synthesized using one step microwave and hydrothermal methods. The as synthesized micro/nanorod samples of WSe2 were characterized using various characterization techniques such as SEM, TEM, Raman spectroscopy, X-ray diffraction, UV-visible and PL spectroscopy. The as synthesized samples were also tested for their applicability to use as cathode materials for supercapacitor applications. The WSe2 samples prepared by the microwave and hydrothermal methods (with use of tungstic acid as precursor) show noteworthy performance towards supercapacitor application. Our work opens a new avenue to use these simple methods to prepare various morphologies of inorganic nanomaterials and utilize them for various energy and nanoelectronics applications.

1 aChakravarty, Disha1 aLate, Dattatray, J. uhttps://library.ncl.res.in/content/microwave-and-hydrothermal-syntheses-wse2-micronanorods-and-their-application-001940nas a2200229 4500008004100000022001400041245009200055210006900147260007700216300001400293520110000307653002401407653001901431653002001450653001301470653001401483100002301497700001901520700002401539700002401563856012301587 2015 eng d a1434-194800aMicrowave-assisted synthesis of few-layered TaTe2 and its application as supercapacitor0 aMicrowaveassisted synthesis of fewlayered TaTe2 and its applicat aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcMAR a1598-16033 a

We report a simple and rapid microwave-assisted synthesis of tantalum telluride (TaTe2) nanosheets. The ratio of tantalum pentachloride (TaCl5) and elemental tellurium (Te) powder were adjusted in the presence of NaBH4 in such a way as to obtain the TaTe2 nanosheet. The samples were characterized by various techniques such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), UV/Vis spectroscopy, photoluminescence (PL) spectroscopy, and XRD. Our SEM, TEM, and AFM results show the formation of sheet-like morphology, while the XRD data confirms the high crystalline quality and stable phase of the TaTe2 formed. The supercapacitor cells were fabricated by using TaTe2 nanosheets as anode material, platinum metal wire as a counterelectrode, and Ag/AgCl as reference electrode. The calculated coulombic efficiency is more than 95%, while the cycle-to-cycle decrease in capacity is less than 5%. The maximum discharge or charging capacity is below 2.4 Wh/kg, which is an ideal characteristic for achieving supercapacitor behavior.

10aMicrowave chemistry10aNanostructures10aSupercapacitors10aTantalum10aTellurium1 aChakravarty, Disha1 aKumar, Praveen1 aUgale, Vaishali, S.1 aLate, Dattatray, J. uhttps://library.ncl.res.in/content/microwave-assisted-synthesis-few-layered-tate2-and-its-application-supercapacitor-000536nas a2200145 4500008004100000245008000041210006900121260000800190490000600198100002400204700001700228700002300245700001400268856010800282 2015 eng d00aPerspective on atomically thin 2d inorganic layered materials for biosensor0 aPerspective on atomically thin 2d inorganic layered materials fo cJAN0 v21 aLate, Dattatray, J.1 aRout, C., S.1 aChakravarty, Disha1 aRatha, S. uhttps://library.ncl.res.in/content/perspective-atomically-thin-2d-inorganic-layered-materials-biosensor02541nas a2200229 4500008004100000022001400041245013000055210006900185260011000254300001600364490000600380520161200386100002801998700002002026700002302046700002202069700002302091700001802114700002602132700002402158856012902182 2015 eng d a2046-206900aPt-nanoparticle functionalized carbon nano-onions for ultra-high energy supercapacitors and enhanced field emission behaviour0 aPtnanoparticle functionalized carbon nanoonions for ultrahigh en aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcSEP a80990-809970 v53 a

In the present work, we have investigated the charge storage capacitive response and field emission behaviour of platinum (Pt) nanoparticles decorated on carbon nano onions (CNOs) and compared them with those of pristine carbon nano onions. The specific capacitance observed for Pt-CNOs is 342.5 F g(-1), about six times higher than that of pristine CNOs, at a scan rate of 100 mV s(-1). The decoration with Pt nanoparticles, without any binder or polymer separator on the CNO, leading to enhanced supercapacitance is due to easy accessibility of Na2SO4 electrolyte in the active material. The Density Functional Theory (DFT) calculations of these systems reveal enhancement in the Density of States (DOS) near the Fermi energy (E-F) on account of platinum decoration on the CNOs. Furthermore, the field emission current density of similar to 0.63 mA cm(-2) has been achieved from the Pt-CNOs emitter at an applied electric field of similar to 4.5 V mu m(-1) and from the pristine CNOs sample current density of similar to 0.4 mA cm(-2) has been achieved at an applied electric field of similar to 6.6 V mu m(-1). The observed enhanced field emission behavior has been attributed to the improved electrical conductivity and increased emitting sites of the Pt-CNO emitter. The field emission current stability of the Pt-CNO emitter over a longer duration is found to be good. The observed results imply multifunctional potential of Pt-CNOs, as supercapacitor material in various next generation hybrid energy storage devices, and field emitters for next generation vacuum nano/microelectronic devices.

1 aSuryawanshi, Sachin, R.1 aKaware, Vaibhav1 aChakravarty, Disha1 aWalke, Pravin, S.1 aMore, Mahendra, A.1 aJoshi, Kavita1 aRout, Chandra, Sekhar1 aLate, Dattatray, J. uhttps://library.ncl.res.in/content/pt-nanoparticle-functionalized-carbon-nano-onions-ultra-high-energy-supercapacitors-and-0