JNCiR :: JNCASR Institutional Repository: Recent submissions

  • Size-dependent changes in the electronic structure of metal clusters as investigated by scanning tunneling spectroscopy 
    Vinod, C P; Kulkarni, G U; Rao, C N R (Elsevier Science BV, 1998-06-12)
    Pd, Ag, Cd and Au clusters of varying sizes have been investigated by scanning tunneling spectroscopy under ultra-high vacuum. The conductance of the clusters decreases markedly when the cluster diameter is ≤ 1nm. A plot ...
  • Charge Density Study of the Polymorphs of p-Nitrophenol 
    Kulkarni, G U; Kumaradhas, P; Rao, C N R (American Chemical Society, 1998-11)
    A careful investigation of the structures and charge densities of the beta and alpha polymorphs of p-nitrophenol has been carried out. Although the two forms crystallize in different monoclinic cells, the crystal densities ...
  • Supramolecular hydrogen-bonded structures in organic amine squarates 
    Mathew, Suresh; Paul, Geo; Shivasankar, K; Choudhury, Amitava; Rao, C N R (Elsevier Science BV, 2002-10-06)
    Structures of monohydrogen squarates of methylamine, ethylenediamine, 1,3-diaminopropane, 1,4-diaminobutane, 1,5-diaminopentane, N,N'-diemethylpiperazine and N,N,N,N-tetramethylguanidine have been studied in detail. The ...
  • Boron- and nitrogen-doped carbon nanotubes and graphene 
    Panchakarla, L S; Govindaraj, A; Rao, C N R (Elsevier Science BV, 2010-12-10)
    Multi-walled, single-walled and double-walled carbon nanotubes as well as graphene can be doped with boron and nitrogen. B2H6 has been generally used as the boron source while NH3 or pyridine is employed as the nitrogen ...
  • Electrochemical synthesis of ferromagnetic LaMnO3 and metallic NdNiO3 
    Mahesh, R; Kannan, K R; Rao, C N R (Academic Press Inc, 1995-01)
    While NdNiO3-δ prepared ordinarily is highly oxygen-deficient and exhibits a metal-insulator transition at low temperature, it has been possible to prepare nearly metallic NdNiO3-δ (δ = 0.05) by electrochemical oxidation. ...
  • Polymerization and Pressure-Induced Amorphization of C60 and C70 
    Rao, C N R; Govindaraj, A; Aiyer, Hemantkumar N; Seshadri, Ram (American Chemical Society, 1995-11-16)
    Scanning tunneling microscopy of solid films of C-60 and C-70 clearly demonstrate the occurrence of photochemical polymerization of these fullerenes in the solid state. X-ray diffraction studies show that such a polymerization ...
  • Novel supramolecular organizations in melamine complexes with 4,4'-bipyridyl and silver nitrate 
    Sivashankar, K; Ranganathan, A; Pedireddi, V R; Rao, C N R (Elsevier Science BV, 2001-01-07)
    Complexes of melamine with 4,4'-bipyridyl and AgNO3 having compositions, C10H8N2:0.5(C3H6N6):H2O and [Ag(C3H6N6)]NO3, respectively, have been prepared for the first time. A crystallographic investigation has shown unique ...
  • Preparation of Monodispersed, Submicron Gold Particles 
    Seshadri, Ram; Rao, C N R (Pergamon-Elsevier Science Ltd, 1994)
    Since micron size gold particles have several possible applications, we have explored ways of producing uniform gold powders of these dimensions. It is found that by employing ethylene glycol or diethylene glycol as solvent ...
  • Electron states of the HCI dimer 
    Pradeep, T; Rao, C N R (American Institute of Physics, 1991-11-15)
    The He i photoelectron spectrum of HCl dimer has been recorded and the observed ionizations at 12.3, 13.6, 15.1 and 17.0 eV have been assigned to different orbitals on the basis of molecular orbital calculations. The ...
  • Nature of nitrogen adsorbed on transition metal surfaces as revealed by electron spectroscopy and cognate techniques 
    Rao, C N R; Rao, G Ranga (Elsevier Science BV, 1991)
    The nature of the chemisorbed states of nitrogen on various transition metal surfaces is discussed comprehensively on the basis of the results of electron spectroscopic investigations augmented by those from other techniques ...
  • A MAS NMR investigation of lead phosphosilicate glasses: The nature of the highly deshielded six-coordinated silicon 
    Prabakar, S; Rao, K J; Rao, C N R (Pergamon-Elsevier Science Ltd, 1991-04)
    Si-29 and P-31 NMR spectra have been studied in a series of lead phosphosilicate glasses. It is found that as the P2O5 content increases, the signal due to the six-coordinated silicon at - 212 ppm grows in intensity. Based ...
  • Tribute To Michael Faraday 
    Rao, C N R (Current Science Association, 1991-12-25)
  • Fullerenes and carbon nanotubes 
    Rao, C N R; Sen, Rahul; Govindaraj, A (Current Science Ltd, 1996-04)
    The discovery of fullerenes, carbon nanotubes and other carbon forms has added a new dimension to materials science. Recent research has led to advances in our knowledge of phase transitions of fullerenes, their magnetic, ...
  • Unusual field dependence of the resistivity and magnetoresistance in Nd0.5Ca0.5MnO3 
    Mahendiran, R; Mahesh, R; Gundakaram, R; Raychaudhuri, A K; Rao, C N R (IOP Publishing Ltd, 1996-08-12)
    An unusually large positive magnetoresistance (MR) is found in the compound Nd0.5Ca0.5MnO3 at low temperatures (T < 50 K). The positive MR is seen when the magnetic field is first applied and it collapses at higher fields ...
  • Oxide nanotubes prepared using carbon nanotubes as templates 
    Satishkumar, B C; Govindaraj, A; Vogl, Erasmus M; Basumallick, Lipika; Rao, C N R (Materials Research Society, 1997-03)
    Hollow nanotubes of SiO2, Al2O3, V2O5, and MoO3 have been prepared using carbon nanotubes as templates. The procedure involves coating the carbon nanotubes with tetraethylorthosilicate, aluminum isopropoxide, or vanadium ...
  • Influence of Cation Size on the Structural Features of Ln1/2A1/2MnO3 Perovskites at Room Temperature 
    Woodward, P M; Vogt, T; Cox, D E; Arulraj, A; Rao, C N R; Karen, P; Cheetham, A K (American Chemical Society, 1998-11)
    Polycrystalline samples of Ln(1/2)Sr(1/2)MnO(3) (Ln = La, Pr, La0.33Nd0.67, Nd, Nd0.5Sm0.5, Sm, and Gd) and Ln(1/2)Ca(1/2)MnO(3) (Ln = La, Pr, La0.5Nd0.5, Nd, Sm, and Y0.5Sm0.5) have been prepared, and structure determinations ...
  • Effect of Internal Pressure on Charge-Ordered Rare Earth Manganates 
    Rao, C N R; Santhosh, P N; Singh, R S; Arulraj, A (Academic Press Inc, 1998-01)
    The effect of internal pressure on charge-ordered rare earth manganates of the composition Ln(1-x)A(x)MnO(3) (Ln = La, Pr, Nd and A = Ca, Sr) has been studied by varying the average radius of the A site cations ([r(A)]). ...
  • Phase transformations of mesoporous zirconia 
    Neeraj; Rao, C N R (Royal Society Chemistry, 1998-07)
    The kinetics of the lamellar-->thexagonal-->cubic transformations of mesoporous zirconia prepared by using a neutral organic amine as the amphiphile have been studied in phosphoric acid medium. The lamellar-->hexagonal ...
  • Synthesis And Structural Characterization Of A Chiral Open-Framework Tin(Ii) Phosphate, [Cn3h6][Sn4p3o12] (Guan-Snpo) 
    Ayyappan, S; Bu, X; Cheetham, A K; Rao, C N R (American Chemical Society, 1998-11)
    A chiral open-framework tin phosphate structure, [CN3H6][Sn4P3O12], has been obtained by using an achiral structure-directing agent, guanidine. The structures of both enantiomorphs have been determined: tetragonal, space ...
  • Multiferroic properties of ErMnO3 
    Sahu, Jyoti Ranjan; Ghosh, Anupama; Sundaresan, A; Rao, C N R (Pergamon-Elsevier Science Ltd, 2009)
    Measurements of magnetic and dielectric properties of single crystalline ErMnO3 establish the Néel and ferroelectric transition temperatures to be 77 K and 588 K respectively. The dielectric constant of ErMnO3 shows an ...

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