DSpace Repository

Browsing by Author "Waghmare, Umesh V"

Browsing by Author "Waghmare, Umesh V"

Sort by: Order: Results:

  • BCN: A Graphene Analogue with Remarkable Adsorptive Properties 
    Raidongia, Kalyan; Nag, Angshuman; Hembram, K P S S; Waghmare, Umesh V; Datta, Ranjan; Rao, C N R (Wiley-VCH Verlag GmbH, 2010)
    A new analogue of graphene containing boron, carbon and nitrogen (BCN) has been obtained by the reaction of high-surface-area activated charcoal with a mixture of boric acid and urea at 900 degrees C. X-ray photoelectron ...
  • Biferroic YCrO3 
    Kundu, Asish K; Krupanidhi, S B; Waghmare, Umesh V; Rao, C N R (American Physical Society, 2005-12)
    YCrO3, which has a monoclinic structure, shows weak ferromagnetism below 140 K (T-N) and a ferroelectric transition at 473 K accompanied by hysteresis. We have determined the structure and energetics of YCrO3 with ferromagnetic ...
  • Chemical storage of hydrogen in few-layer graphene 
    Subrahmanyam, K S; Kumar, Prashant; Maitra, Urmimala; Govindaraj, A; Hembram, K P S S; Waghmare, Umesh V; Rao, C N R (National Academy of Sciences, 2011-02-15)
    Birch reduction of few-layer graphene samples gives rise to hydrogenated samples containing up to 5 wt % of hydrogen. Spectroscopic studies reveal the presence of sp(3) C-H bonds in the hydrogenated graphenes. They, however, ...
  • Chemical storage of hydrogen in few-layer graphene 
    Subrahmanyam, K S; Kumar, Prashant; Maitra, Urmimala; Govindaraj, A; Hembram, K P S S; Waghmare, Umesh V; Rao, C N R (National Academy of Sciences, 2011-02-15)
    Birch reduction of few-layer graphene samples gives rise to hydrogenated samples containing up to 5 wt % of hydrogen. Spectroscopic studies reveal the presence of sp(3) C-H bonds in the hydrogenated graphenes. They, however, ...
  • First-principles of stacking faults and deformation-induced polymorphs of metals 
    Bhogra, Meha (JNCASRTSU, 2014-09-22)
  • Graphene analogues of BN: novel synthesis and properties 
    Nag, Angshuman; Raidongia, Kalyan; Hembram, Kailash P S S; Datta, Ranjan; Waghmare, Umesh V; Rao, C N R (The American Chemical Society, 2010-03)
    Enthused by the fascinating properties of graphene, we have prepared graphene analogues of BN by a chemical method with a control on the number of layers. The method involves the reaction of boric acid with urea, wherein ...
  • InMnO3: A biferroic 
    Serrao, Claudy Rayan; Krupanidhi, S B; Bhattacharjee, Joydeep; Waghmare, Umesh V; Kundu, Asish K; Rao, C N R (American Institute of Physics, 2006-10-01)
    InMnO3 which has a hexagonal structure similar to that of YMnO3 is found to show a canted antiferromagnetic behavior below 50 K (T-N) and a ferroelectric (FE) transition at 500 K accompanied by hystersis. We have determined ...
  • Multiferroic properties of Nanocrystalline BaTiO3 
    Mangalam, R V K; Ray, Nirat; Waghmare, Umesh V; Sundaresan, A; Rao, C N R (Elsevier Ltd, 2009-01)
    Some of the Multiferroics [H. Schmid, Ferroelectrics 162 (1994) 317] form a rare class of materials that exhibit magneto–electric coupling arising from the coexistence of ferromagnetism and ferroelectricity, with potential ...
  • Phase Transitions of AlFeO(3) and GaFeO(3) from the Chiral Orthorhombic (Pna2(1)) Structure to the Rhombohedral (R(3)over-barc) Structure 
    Saha, Rana; Shireen, Ajmala; Shirodkar, Sharmila N; Singh, Mukta Shashi; Waghmare, Umesh V; Sundaresan, A; Rao, C N R (American Chemical Society, 2011-10-03)
    AlFeO(3) and GaFeO(3), which crystallize in a chiral orthorhombic (Pna2(1)) structure, transform to a rhombohedral (R (3) over barc) structure when subjected to ball-milling. There is a distinct difference between the ...
  • Rare earth chromites: a new family of multiferroics 
    Sahu, Jyoti Ranjan; Serrao, Claudy Rayan; Ray, Nirat; Waghmare, Umesh V; Rao, C N R (Royal Society of Chemistry, 2007)
    Heavy rare earth chromites of the formula LnCrO(3) with Ln = Ho, Er, Yb, Lu and Y are shown to be multiferroic, exhibiting canted antiferromagnetism at low temperatures (T-N = 113-140 K) and a ferroelectric transition in ...
  • Size dependence of structural, electronic, elastic, and optical properties of selenium nanowires: A first-principles study 
    Kahaly, Mousumi Upadhyay; Ghosh, Prasenjit; Narasimhan, Shobhana; Waghmare, Umesh V (American Institute of Physics, 2008-01-28)
    We have studied the structural, elastic, and optical properties of selenium nanowires, as well as bulk selenium, by performing first-principles density functional theory calculations. The nanowires are structurally similar ...
  • Size dependence of structural, electronic, elastic, and optical properties of selenium nanowires: A first-principles study 
    Kahaly, Mousumi Upadhyay; Ghosh, Prasenjit; Narasimhan, Shobhana; Waghmare, Umesh V (American Institute of Physics, 2008-01-28)
    We have studied the structural, elastic, and optical properties of selenium nanowires, as well as bulk selenium, by performing first-principles density functional theory calculations. The nanowires are structurally similar ...
  • Synthesis, Structure, and Properties of Mesoporous B/C/N Microspheres 
    Raidongia, Kalyan; Hembram, K P S S; Waghmare, Umesh V; Eswaramoorthy, M; Rao, C N R (Wiley-VCH Verlag Gmbh, 2010)
    Reaction of low surface area carbon with a mixture of urea and boric acid at 930 degrees C yields a composition close to BC4N with a graphitic structure. BC4N was characterized by electron energy loss spectroscopy, X-ray ...
  • Temperature effects on the Raman spectra of graphenes: dependence on the number of layers and doping 
    Late, Dattatray J; Maitra, Urmimala; Panchakarla, L S; Waghmare, Umesh V; Rao, C N R (IOP Publishing Ltd, 2011-02-09)
    Temperature effects on the various features in the Raman spectra of several graphene samples and graphene nanoribbons have been investigated over the temperature range 77-573 K. The temperature coefficient of the G and 2D ...

Search DSpace

Browse

My Account