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<p>{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</p>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-001884nas a2200229   4500008004100000022001400041245009800055210006900153260011000222300001600332490000600348520097300354100002601327700002601353700002801379700002301407700001801430700002401448700002401472700002601496856013201522       2015                        eng d  a2046-206900aFacile synthesis of Ag nanowire-rGO composites and their promising field emission performance0 aFacile synthesis of Ag nanowirerGO composites and their promisin  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcAPR  a41887-418930 v53 a<p>Crystalline, ultra long silver nanowires (Ag NWs), few-layered rGO (reduced graphene oxide) and their rGO-Ag NW nanocomposite have been synthesized using a polyol reflux technique under optimized experimental conditions. The field emission performance of the rGO-Ag NW nanocomposite, rGO and Ag NW emitters was investigated. The turn on field required to draw an emission current density of similar to 1 mA cm(-2) was found to be similar to 5.00, 3.92 and 2.40 V mu m(-1) for the Ag NW, rGO and rGO-Ag NW nanocomposite emitters, respectively. The combined contribution of the sharp edges of the thin graphene sheets and high aspect ratio of the Ag nanowires, and their synergetic effect in the rGO-Ag NW nanocomposite, are responsible for the enhanced field emission behavior. First-principles density functional calculations show that the enhanced field emission may also be due to the overlapping of the electronic structures of the Ag NWs and rGO nanosheets.</p>1 aSamantara, Aneeya, K.1 aMishra, Dillip, Kumar1 aSuryawanshi, Sachin, R.1 aMore, Mahendra, A.1 aThapa, Ranjit1 aLate, Dattatray, J.1 aJena, Bikash, Kumar1 aRout, Chandra, Sekhar  uhttps://library.ncl.res.in/content/facile-synthesis-ag-nanowire-rgo-composites-and-their-promising-field-emission-performance-001111nas a2200205   4500008004100000022001400041245006100055210006100116260011000177300001400287490000600301520036900307100002000676700002300696700002300719700001800742700002400760700002600784856009500810       2015                        eng d  a2046-206900aField emission properties of spinel ZnCo2O4 microflowers0 aField emission properties of spinel ZnCo2O4 microflowers  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcDEC  a5372-53780 v53 a<p>ZnCo2O4 microflowers were synthesized by a simple low temperature hydrothermal route. A single three-dimensional microflower consists of hundreds of self-assembled petals, with a thickness of several nanometers. These microflowers have exceptionally thin edges with a few petal layers. The ZnCo2O4 microflowers appeared to be stable and good field emitters.</p>1 aRatha, Satyajit1 aKhare, Ruchita, T.1 aMore, Mahendra, A.1 aThapa, Ranjit1 aLate, Dattatray, J.1 aRout, Chandra, Sekhar  uhttps://library.ncl.res.in/content/field-emission-properties-spinel-znco2o4-microflowers-002056nas a2200241   4500008004100000022001400041245014000055210006900195260000800264300001400272490000600286520118400292653003001476653002401506653001901530653002001549100002101569700002901590700001801619700002401637700002601661856012701687       2019                        eng d  a2168-048500aFacile production of mesoporous WO3-rGO hybrids for high-performance supercapacitor electrodes: an experimental and computational study0 aFacile production of mesoporous WO3rGO hybrids for highperforman  cJAN  a2350-23590 v73 a<p>This work explored a promising supercapacitor electrode material (WO3-rGO hybrids) synthesized via a simplistic one-pot hydrothermal synthesis route. Various analytical studies (X-ray diffraction study, Raman spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller analysis) were employed in furtherance to explore the structural, morphological, compositional, and surface areal properties of the prepared materials. The enhancement in electrochemical supercapacitive properties were evaluated from pure hexagonal phase WO3 to the various hybrids, depending on the concentration of GO introduced into it, using cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy. The WG-80 composite revealed the high rise in capacitance value of 801.6 F/g overcoming the individual capacitance of rGO (71.11 F/g) and WO3 (94.22 F/g) at a current density of 4 A/g with good cycling stability (75.7%) over 5000 cycles. We have presented quantum capacitance from ab initio calculations and provided theoretical explanation from the orbital interactions.</p>10aDensity functional theory10aHydrothermal method10asupercapacitor10aWO3-rGO hybrids1 aSamal, Rutuparna1 aChakraborty, Brahmananda1 aSaxena, Manav1 aLate, Dattatray, J.1 aRout, Chandra, Sekhar  uhttps://library.ncl.res.in/content/facile-production-mesoporous-wo3-rgo-hybrids-high-performance-supercapacitor-electrodes01171nas a2200133   4500008004100000245005800041210005800099260001300157520070900170100001800879700002600897700002400923856009000947       2019                        eng d00aFundamentals and sensing applications of 2D materials0 aFundamentals and sensing applications of 2D materials  bElsevier3 aFundamentals and Sensing Applications of 2D Materials provides a comprehensive understanding of a wide range of 2D materials. Examples of fundamental topics include: defect and vacancy engineering, doping and advantages of 2D materials for sensing, 2D materials and composites for sensing, and 2D materials in biosystems. A wide range of applications are addressed, such as gas sensors based on 2D materials, electrochemical glucose sensors, biosensors (enzymatic and non-enzymatic), and printed, stretchable, wearable and flexible biosensors. Due to their sub-nanometer thickness, 2D materials have a high packing density, thus making them suitable for the fabrication of thin film based sensor devices.1 aHywel, Morgan1 aRout, Chandra, Sekhar1 aLate, Dattatray, J.  uhttps://library.ncl.res.in/content/fundamentals-and-sensing-applications-2d-materials