01762nas a2200277   4500008004100000022001400041245006700055210006700122260008100189300001100270490000600281520085000287653003001137653001901167653001501186653001201201653001101213100002301224700002301247700002401270700002301294700001801317700002401335700002601359856009901385       2015                        eng d  a2053-159100aEnhanced electron field emission from NiCo2O4 nanosheet arrays0 aEnhanced electron field emission from NiCo2O4 nanosheet arrays  aTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLANDbIOP PUBLISHING LTDcSEP  a0950110 v23 a<p>Electron emission properties of electrodeposited spinel NiCo2O4 nanosheet arrays grown on Ni foam have been studied. The work function of NiCo2O4 was calculated by density functional theory using the plane-wave basis set and used to estimate the field enhancement factor. The NiCo2O4 nanosheet arrays exhibited a low turn-on field of 1.86 V mu m(-1) at 1 mu A cm(-2) and current density of 686 mu A cm(-2) at 3.2 V mu m(-1), with field enhancement factor beta = 1460 and good field emission current stability. The field emission properties of the NiCo2O4 nanosheet arrays showed enhanced performance compared to chemically prepared NiCo2O4 nanosheets. Hence, the nanosheet arrays have great potential as robust high performance vertical structure electron emitters for future flat panel displays and vacuum electronic device applications.</p>10aDensity functional theory10afield emission10ananosheets10aNiCo2O410aspinel1 aNaik, Kusha, Kumar1 aKhare, Ruchita, T.1 aGelamo, Rogerio, V.1 aMore, Mahendra, A.1 aThapa, Ranjit1 aLate, Dattatray, J.1 aRout, Chandra, Sekhar  uhttps://library.ncl.res.in/content/enhanced-electron-field-emission-nico2o4-nanosheet-arrays-101325nas a2200193   4500008004100000022001400041245006600055210006600121260008700187300001100274490000800285520061800293100002300911700002400934700002300958700002400981700002601005856010001031       2015                        eng d  a0003-695100aEnhanced field emission of plasma treated multilayer graphene0 aEnhanced field emission of plasma treated multilayer graphene  a1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USAbAMER INST PHYSICScSEP  a1235030 v1073 a<p>Electron emission properties of multilayer graphene (MLG) prepared by a facile exfoliation technique have been studied. Effect of CO2 Ar, N-2, plasma treatment was studied using Raman spectroscopy and investigated for field emission based application. The CO2 plasma treated multilayer graphene shows an enhanced field emission behavior with a low turn on field of 0.18 V/mu m and high emission current density of 1.89 mA/cm(2) at an applied field of 0.35 V/mu m. Further the plasma treated MLG exhibits excellent current stability at a lower and higher emission current value. (C) 2015 AIP Publishing LLC.</p>1 aKhare, Ruchita, T.1 aGelamo, Rogerio, V.1 aMore, Mahendra, A.1 aLate, Dattatray, J.1 aRout, Chandra, Sekhar  uhttps://library.ncl.res.in/content/enhanced-field-emission-plasma-treated-multilayer-graphene-101766nas a2200217   4500008004100000022001400041245015400055210006900209260011000278300001600388490000600404520084700410100002201257700002201279700002501301700002401326700002401350700002601374700002401400856012401424       2016                        eng d  a2046-206900aEffect of plasma treatment on multilayer graphene: X-ray photoelectron spectroscopy, surface morphology investigations and work function measurements0 aEffect of plasma treatment on multilayer graphene Xray photoelec  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY  a48843-488500 v63 a<p>We report here the effect of plasma treatment on multilayer graphene samples as determined by X-ray photoelectron spectroscopy and surface morphology studies with atomic force microscopy, scanning electron microscopy and transmission electron microscopy. The plasma treatment was modified to introduce controlled levels of defects and functionalities to the graphene samples to give tunable properties. The elemental composition and structure were investigated by XPS and micro Raman spectroscopy. The XPS study showed that there was a slight variation in the sp(2)/sp(3) hybridization ratio between the plasma-treated samples and the pristine sample. Kelvin probe measurements were carried out on all the multilayer graphene samples and indicated a slight variation in the work function of the graphene samples after plasma treatment.</p>1 aPatil, Urmila, V.1 aPawbake, Amit, S.1 aMachuno, Luis, G. B.1 aGelamo, Rogerio, V.1 aJadkar, Sandesh, R.1 aRout, Chandra, Sekhar1 aLate, Dattatray, J.  uhttps://library.ncl.res.in/content/effect-plasma-treatment-multilayer-graphene-x-ray-photoelectron-spectroscopy-surface02134nas a2200277   4500008004100000022001200041245010700053210006900160260000900229300001200238490000700250520121100257653001301468653001801481653001101499653002801510653002301538100002201561700001901583700002501602700002401627700002701651700002601678700002401704856012801728       2018                        eng d  a925963500aTemperature and pressure dependent Raman spectroscopy of plasma treated multilayer graphene nanosheets0 aTemperature and pressure dependent Raman spectroscopy of plasma   cAPR   a146-1560 v843 a<p>Understanding of the fine structure at the atomic level and properties of graphene by creating defects is important from the point of view of thermal and stress management. Here we report Raman spectroscopic studies on pristine and plasma treated multilayer graphene to explore the remarkable structure and phonon properties with temperature and pressure. Temperature dependent studies illustrate monotonic softening of G and G′ bands in the temperature range 78 to 573 K. This process can be of fundamental importance in other promising and emerging nano and heterostructured materials. The pressure dependent Raman spectroscopic investigations on G-band of these samples were carried out up to 25 GPa using a diamond anvil cell. Comparatively weak and more compressible nature of the G band (E2g in-plane mode) as a function of applied pressure is found in plasma treated graphene. After pressure release, the samples recover to their original ordered structure. The present study is important for further understanding of the fine structure, properties and effect of defects in graphene, which can affect the atomic bonds, thermal expansion, specific heat, and thermal conductivity as well.</p>10agraphene10ahigh pressure10aPhonon10aPlasma treated graphene10aRaman spectroscopy1 aPawbake, Amit, S.1 aMishra, K., K.1 aMachuno, Luis, G. B.1 aGelamo, Rogerio, V.1 aRavindranathan, T., R.1 aRout, Chandra, Sekhar1 aLate, Dattatray, J.  uhttps://library.ncl.res.in/content/temperature-and-pressure-dependent-raman-spectroscopy-plasma-treated-multilayer-graphene