01615nas a2200205 4500008004100000245005400041210005400095260000800149300002700157490000800184520096300192100002301155700002401178700002401202700002301226700002101249700003001270700002401300856008501324 2015 eng d00aGraphene nanoribbons as prospective field emitter0 aGraphene nanoribbons as prospective field emitter cJAN aArticle Number: 0231110 v1063 a

Field emission characteristics of graphene nanoribbons (GNRs) synthesized by unzipping of multiwall carbon nanotubes using a facile hydrothermal route have been investigated at a base pressure of 1 x 10(-8) mbar. The values of turn-on field, required to draw an emission current densities of 1 and 10 mu A/cm(2), are found to be 2.8 and 5.8 V/mu m, respectively, and a maximum emission current density of 500 mu A/cm(2) has been drawn at an applied field of 9.8 V/mu m. The emission current stability of the GNRs emitter was studied at preset values of 1 and 10 mu A over a period of 3 h, and is found to be excellent. The field emission results demonstrated herein suggest that GNRs based field emitters can open up many opportunities for their potential utilization as large area field emitters in various vacuum micro-nanoelectronic devices such as flexible field emission displays, portable X-ray, and microwave tubes. (C) 2015 AIP Publishing LLC.

1 aKhare, Ruchita, T.1 aShinde, Dhanraj, B.1 aBansode, Sanjeewani1 aMore, Mahendra, A.1 aMajumder, Mainak1 aPillai, Vijayamohanan, K.1 aLate, Dattatray, J. uhttp://library.ncl.res.in/content/graphene-nanoribbons-prospective-field-emitter01554nas a2200229 4500008004100000022001400041245010200055210006900157260006700226300001400293490000700307520071500314653001201029653000901041653002601050653001901076653002701095100002301122700002401145700002401169856013101193 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. uhttp://library.ncl.res.in/content/graphene-quantum-dots-enhanced-plant-growth-regulators-effects-coriander-and-garlic-plants-001593nas a2200193 4500008004100000022001400041245007700055210006900132260011000201300001600311490000600327520084100333100002301174700002301197700002301220700002401243700002601267856010601293 2016 eng d a2046-206900aGlucose sensing and low-threshold field emission from MnCo2O4 nanosheets0 aGlucose sensing and lowthreshold field emission from MnCo2O4 nan aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAR a29734-297400 v63 a

Manganese cobalt oxide (MnCo2O4) nanosheets were grown on nickel (Ni) foam by a simple electrodeposition method. The as-synthesized nanosheets were characterized using X-ray diffraction and scanning electron microscopy. The Ni foam supports the growth of MnCo2O4 nanosheets without any aggregation, thereby increasing its catalytic and electronic properties. The electrochemical studies show that MnCo2O4 exhibits excellent electrocatalytic activity towards glucose sensing applications. The MnCo2O4 based glucose sensor shows a good sensitivity value of 8.2 mA mM(-1) cm(-2), with a response time of 19 s. In addition to this, field emission studies of as-synthesized MnCo2O4 reveal a low turn-on field value of 1.9 V mm(-1) and good emission current stability, demonstrating MnCo2O4 nanosheets as a good field emitter material.

1 aNaik, Kusha, Kumar1 aKhare, Ruchita, T.1 aMore, Mahendra, A.1 aLate, Dattatray, J.1 aRout, Chandra, Sekhar uhttp://library.ncl.res.in/content/glucose-sensing-and-low-threshold-field-emission-mnco2o4-nanosheets02850nas a2200253 4500008004100000022001400041245010500055210006900160260000800229300001100237490000600248520197200254653002102226653001902247653004502266653001602311100002302327700002402350700002502374700002302399700002402422700002802446856012202474 2019 eng d a2053-159100aGraphene nanosheets assisted carbon hollow cylinder for high-performance field emission applications0 aGraphene nanosheets assisted carbon hollow cylinder for highperf cSEP a0950660 v63 a

Electron sources are critical constituents for myriad many electronic applications including electron imaging, mass spectroscopy etc. Here, we report the realization of high-performance field emission from graphene assisted carbon hollow cylinders (Gr-CHCs) composed of multi-stacked radially aligned CNTs. These CHCs have built-in synthesis related Fe nanoparticles (NPs). This engineered nano-structure exhibits excellent field emission properties such as one of the ultra-low turn-on field (0.64V mu m(-1) at 10 mu A cm(-2)), low threshold field (0.74V mu m(-1) at 100 mu A cm(-2)), very high current density (15.49 mA cm(-2) at 1.32V mu m(-1)) which is nearly double the current density obtained in our previous study. High field enhancement factor (0.72. x. 10(4)) with highly stable emission current at 100 mu A was observed for more than 3 hrs at the base pressure of similar to 1. x. 10(-8) mbar. This study suggests an approach to enhance the current density using the proposed innovative nanostructure and forms the basic theme of this communication. Highly efficient and stable field emissions observed are attributed to the geometry of cylinder and the production of the high density of sharp protrusions within the graphene sheets which enhance the local electric field and dramatically enhance field emission. This innovative cylindrical geometry associated with graphene assisted on Fe bearing aligned CNTs along with the periphery of the bulk cylinder provides an easy injection of electrons from the conduction band of CHCs into the vacuum in the presence of an external electric field. The tunability of field emission properties of these CHCs can be easily achieved by tailoring their diameter (10 and 20 mm) and different concentrations of the precursor. This new approach of the graphene assisted cylindrical geometry-based field emitter source provides enormous prospects and demand for next-generation high resolutions display devices.

10aCarbon nanotubes10afield emission10agraphene assisted carbon hollow cylinder10aprotrusions1 aTripathi, Prashant1 aGupta, Bipin, Kumar1 aBankar, Prashant, K.1 aMore, Mahendra, A.1 aLate, Dattatray, J.1 aSrivastava, Onkar, Nath uhttp://library.ncl.res.in/content/graphene-nanosheets-assisted-carbon-hollow-cylinder-high-performance-field-emission