Research Papers (Prof. C.N.R. Rao): Recent submissions

  • Science and technology of nanomaterials: current status and future prospects 
    Rao, C N R; Cheetham, A K (Royal Society of Chemistry, 2001)
    The science and technology of nanomaterials has created great excitement and expectations in the last few years. By its very nature, the subject is of immense academic interest, having to do with very tiny objects in the ...
  • Simple Synthesis of MoS2 and WS2 Nanotubes 
    Nath, Manashi; Govindaraj, Achutharao; Rao, C N R (WILEY-VCH Verlag GmbH, 2001-02-19)
    Trisulfide molybdenum complexes have been employed to produce nanotubes by simple heating in a stream of hydrogen. Bamboo-like stacking (see Figure) was observed, suggesting that the stimulus for the growth of MoS2 nanotubes ...
  • Ferromagnetism Exhibited by Nanoparticles of Noble Metals 
    Maitra, Urmimala; Das, Barun; Kumar, Nitesh; Sundaresan, Athinarayanan; Rao, C N R (Wiley-Blackwell, 2011-08-22)
    Gold nanoparticles with average diameters in the range 2.515 nm, prepared at the organic/aqueous interface by using tetrakis( hydroxymethyl) phosphonium chloride (THPC) as reducing agent, exhibit ferromagnetism whereby the ...
  • Optical limiting in single-walled carbon nanotube suspensions 
    Mishra, S R; Rawat, H S; Mehendale, S C; Rustagi, K C; Sood, A K; Bandyopadhyay, Ranjini; Govindaraj, A; Rao, C N R (Elsevier Science BV, 2000-01-04)
    Optical limiting behaviour of suspensions of single-walled carbon nanotubes in water, ethanol and ethylene glycol is reported. Experiments with 532 nm, 15 ns duration laser pulses show that optical limiting occurs mainly ...
  • Synthesis, characterization and spectroscopy of composites of graphene with CdSe and CdS nanoparticles 
    Moses, Kota; Panchakarla, L S; Matte, H S S Ramakrishna; Govindarao, Bolla; Rao, C N R (National Institute of Science Communication and Information Resources, 2011-09)
    Nanocomposites of few-layer graphene with nanoparticles of CdSe and CdS have been synthesized by two different methods, one involving ultrasonication of a mixture of graphene and the chalcogenide nanoparticles, and another ...
  • Production of bundles of aligned carbon and carbon-nitrogen nanotubes by the pyrolysis of precursors on silica-supported iron and cobalt catalysts 
    Nath, Manashi; Satishkumar, B C; Govindaraj, A; Vinod, C P; Rao, C N R (Elsevier Science BV, 2000-05-26)
    Pyrolysis of acetylene over iron or cobalt nanoparticles well dispersed on silica substrates gives copious yields of aligned carbon nanotube bundles. By carrying out the pyrolysis of pyridine over these catalyst surfaces, ...
  • Y-junction carbon nanotubes 
    Satishkumar, B C; Thomas, PJohn; Govindaraj, A; Rao, C N R (American Institute of Physics, 2000-10-16)
    Carbon nanotubes with junctions are considered to be of potential value in nanoelectronics. A simple pyrolysis procedure for producing Y-junction carbon nanotubes is described. The method involves the pyrolysis of the ...
  • Pressure Effects on Single Wall Carbon Nanotube Bundles 
    Teredesai, P V; Sood, A K; Sharma, S M; Karmakar, S; Sikka, S K; Govindaraj, A; Rao, C N R (WILEY-VCH Verlag GmbH, 2001-01)
    We report high pressure Raman studies on single wall carbon nanotube bundles under hydrostatic conditions using two different pressure transmitting media, alcohol mixture and pure water. The radial and tangential modes ...
  • The structure of two new non-centrosymmetric phases of oxygen deficient bismuth manganite 
    Eggeman, A S; Sundaresan, A; Rao, C N R; Midgley, P A (Royal Society of Chemistry, 2011)
    The structure of two new phases in the bismuth manganite system are reported. The phases were determined by electron diffraction studies of two oxygen-deficient bulk samples. The first phase, a minority component of bulk ...
  • Synthesis of metal oxide nanorods using carbon nanotubes as templates 
    Satishkumar, B C; Govindaraj, A; Nath, Manashi; Rao, C N R (Royal Society of Chemistry, 2000)
    Nanorods of several oxides, with diameters in the range of 10-200 nm and lengths upto a few microns, have been prepared by templating against carbon nanotubes. The oxides include V2O5, WO3, MoO3 and Sb2O5 as well as metallic ...
  • Brillouin scattering from C-70 and C-60 films: a comparative study of elastic properties 
    Murugavel, P; Narayana, Chandrabhas; Govindaraj, A; Sood, Ajay K; Rao, C N R (Elsevier Science BV, 2000-12-01)
    Brillouin scattering measurements carried out on a thin film of C-70 deposited on a Si(100) substrate show modes at 4.8 and 25 GHz due to the surface Rayleigh wave and the bulk longitudinal acoustic mode, respectively, the ...
  • Magic Nuclearity Giant Clusters of Metal Nanocrystals Formed by Mesoscale Self-Assembly 
    Thomas, P John; Kulkarni, G U; Rao, C N R (American Chemical Society, 2001-04-05)
    Magic nuclearity giant clusters formed by the mesoscale self-assembly of Pd nanocrystals of 2.5 nm diameter (nuclearity, similar to 561) have been identified by transmission electron microscopy. The clusters have discrete ...
  • Nanotubes 
    Rao, C N R; Satishkumar, B C; Govindaraj, A; Nath, Manashi (WILEY-VCH Verlag GmbH, 2001-02-16)
    Carbon nanotubes were discovered soon after the successful laboratory synthesis of fulferenes. Since their discovery in 1997, there has been intensive research activity in the area of carbon nanotubes, not only because of ...
  • Surfactant-assisted synthesis of semiconductor nanotubes and nanowires 
    Rao, C N R; Govindaraj, A; Deepak, F Leonard; Gunari, N A; Nath, Manashi (American Institute of Physics, 2001-03-26)
    Nanotubes and nanowires of CdSe and CdS have been obtained from solutions containing a surfactant such as Triton 100-X. They have been characterized by x-ray diffraction, electron microscopy, and optical spectroscopy. (C) ...
  • An approach to the synthesis of organically templated open-framework metal sulfates by the amine-sulfate route 
    Choudhury, Amitava; Krishnamoorthy, Jayaraman; Rao, C N R (Royal Society Chemistry, 2001-12-21)
    The first organically templated cadmium sulfates, [C4N2H12][CdCl2SO4].H2O and [C4N2H12](4)[Cd3Cl10(SO4)(2)-(H2O)]. 3H(2)O, consisting of infinite linear chains and a quasi-2D layer formed by strip-like units respectively, ...
  • Synthesis and characterization of submicron-sized mesoporous aluminosilicate spheres 
    Gundiah, Gautam; Eswaramoorthy, M; Neeraj, S; Natarajan, Srinivasan; Rao, C N R (Indian Academy of Sciences, 2001-06)
    Mesoporous aluminosilicate spheres of 0.3-0.4 mum diameter, with different Si/Al ratios, have been prepared by surfactant templating. Surface area of these mated als is in the 510-970 m(2) g(-1) range and pore diameter in ...
  • Electron-Hole Asymmetry in the Rare-Earth Manganates: A Comparative Study of the Hole- and the Electron-Doped Materials 
    Sarathy, K Vijaya; Vanitha, P V; Seshadri, Ram; Cheetham, A K; Rao, C N R (American Chemical Society, 2001-03)
    Properties of the hole-doped Ln(1-x)A(x)MnO(3) (Ln = rare earth, A = alkaline earth, x < 0.5) are compared with those of the electron-doped compositions (x > 0.5). Charge ordering is the dominant interaction in the latter ...
  • An investigation of the re-entrant ferromagnetic transition in rare earth manganates in the regime of competing charge-ordering and ferromagnetic interactions 
    Vanitha, P V; Rao, C N R (IOP Publishing Ltd, 2001-12-17)
    Manganates of the compositions Nd0.5-xLaxCa0.5MnO3 and Pr0.5-xLaxCa0.5 MnO3, with the average A-site cation radius, <r(A)>, in the range 1.17-1.20 Angstrom, are charge ordered at ordinary temperatures (T-CO similar to 240 ...
  • Surface Enrichment in Alcohol-Water Mixtures 
    Raina, G; Kulkarni, G U; Rao, C N R (American Chemical Society, 2001-11-15)
    Molecular beams generated from the vapors above the surfaces of alcohol-water mixtures have been examined by mass spectrometry. The alcohols examined are methanol, ethanol, n-propanol, and n-butanol. The variation of the ...
  • Basic building units, self-assembly and crystallization in the formation of complex inorganic open architectures 
    Rao, C N R (Indian Academy of Sciences, 2001-10)
    Careful investigations of open-framework metal phosphates reveal that the formation of these complex architectures is likely to involve a process wherein one-dimensional ladders or chains, and possibly zero-dimensional ...

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