Prof. C.N.R. Rao's Publications: Recent submissions

Now showing items 101-120 of 892

Electronic transitions of hydrogen bonded complexes: an electron energy loss spectroscopic study

Pradeep, T; Rao, C N R (Elsevier Science BV, 1990-07)

Electronic spectra of hydrogen bonded complexes have been studied by electron energy loss spectroscopy and assignments made based on experimental orbital energies from HeI photoelectron spectra and molecular orbital ...
Mesoporous phases based on SnO2 and TiO2

Ulagappan, N; Rao, C N R (Royal Society Chemistry, 1996-07-21)

A hexagonal mesoporous phase based on SnO2 is synthesized for the first time by using an anionic surfactant; hexagonal phases of TiO2 are prepared with neutral amine surfactants.
123, 247, and 124 cuprate superconductors: Investigations of thermodynamic stabilities, defect structures, and intergrowths

Rao, C N R; Subbanna, G N; Nagarajan, R; Ganguli, A K; Ganapathi, L; Vijayaraghavan, R; Bhat, S V; Raju, A R (Academic Press Inc JNL-Comp Subscriptions, 1990-09)

Careful investigations employing nonresonant microwave or rf absorption, Cu2+ EPR spectra, X-ray diffraction, and electron microscopy show that orthorhombic YBa2Cu3O7−δ is thermodynamically stable and monophasic when δ is ...
Nanorods and nanofilms of ZnO generated at the liquid-liquid interface

Manjunatha, S; Panchakarla, L S; Biswas, Kanishka; Rao, C N R (Elsevier Science SA, 2010-06-20)

Reaction between zinc cupferron and alkali at the organic-aqueous interface has been investigated in detail. In the presence of an organic amine, this reaction yields ZnO nanorods, the morphology depending on the concentration ...
Electrical and magnetic properties of La2−xSrxNiO4: A tentative phase diagram

Sreedhar, K; Rao, C N R (Pergamon-Elsevier Science Ltd, 1990-10)

La2−xSrxNiO4 shows a maximum in the c/a ratio around x=0.6 up to which composition the concentration of holes is equal to that expected theoretically. The material becomes a degenerate semiconductor above a certain temperature ...
Evidence for supramolecular organization of alkane and surfactant molecules in the process of forming mesoporous silica

Ulagappan, N; Rao, C N R (Royal Society Chemistry, 1996-12-21)

Investigations of the pore expansion in mesoporous silica in the presence of n-alkanes suggest a cooperative organization of the surfactant and alkane molecules, involving additivity of chain lengths.
Urea route to coat inorganic nanowires, carbon fibers and nanotubes with boron nitride

Gomathi, A; Harika, M Ramya; Rao, C N R (Elsevier Science SA, 2008-03-15)

A simple route involving urea as the nitrogen source has been employed to carry out boron nitride coating on carbon fibers, multi-walled carbon nanotubes and inorganic nanowires. The process involves heating the carbon ...
Structure and superconducting properties of a new family of thallium cuprates, TlSr3−xLnxCu2O7

Manivannan, V; Rangavittal, N; Gopalakrishnan, J; Rao, C N R (Elsevier Science BV, 1993-04-10)

Cuprates of the formula TlSr3−xLnxCu2O7 (Ln=Pr, NdorY) derived from the hypothetical TlSr3Cu2O7 show superconductivity with Tcs up to 95 K when 0.5≲x≤0.75, the x=1.0 compositions being insulators. Rietveld analysis of X-ray ...
A neutron diffraction study of the superconductor, Tl0.5Pb0.5CaSr2Cu2Oy

Ganguli, A K; Nanjundaswamy, K S; Rao, C N R; Sequeira, A; Rajagopal, H (Pergamon-Elsevier Science Ltd, 1989)

The structure of Tl0.5Pb0.5CaSr2Cu2Oy (Tc = 90K) has been investigated by neutron diffraction profile analysis and the results discussed in the light of the structures of TlCaBa2CuP2Cy and TlCa0.5Y0.5Ba2Cu2Oy. We find no ...
Simple double-layer cuprates: 60K superconductivity in a lanthanum barium strontium copper oxide [La1.6Ba0.4SrCu2O6]

Mahesh, R; Vijayaraghavan, R; Rao, C N R (Pergamon-Elsevier Science Ltd, 1994-03)

Double layer cuprates of the formulae LaSrLnCu2O6 (Ln = Y or rare earth) and La2-xBaxACu2O6 (A = Ca, Sr) have been prepared by the traditional ceramic method and also by heating CuO, KClO3 and a carbonate mixture obtained ...
Hybrid structures formed by homo- and hetero leptic aliphatic dicarboxylates of lead with 2D-inorganic connectivity

Thirumurugan, A; Rao, C N R (Elsevier Inc, 2008-05)

Three-dimensional homoleptic (single type of ligand) lead dicarboxylates with hybrid structures involving Pb–O–Pb linkages of the compositions, Pb(C5H6O4), I, and Pb(C6H8O4), II and III, have been synthesized and characterized. ...
The Metal-Nonmetal Transition : A Global Perspective

Edwards, P P; Ramakrishnan, T V; Rao, C N R (American Chemical Society, 1995)

A wide range of condensed matter systems traverse the metal–nonmetal transition. These include doped semiconductors, metal–ammonia solutions, metal clusters, metal alloys, transition metal oxides, and superconducting ...
Chiral and Achiral Malate Frameworks with Different Dimensionalities

Ghosh, Anupama; Rao, C N R (Wiley-V C H Verlag Gmbh, 2008)

A hybrid chain compound of the formula [Sr(L- C4H4O5)center dot 3H(2)O]center dot H2O (1) and a hybrid double layered compound of the formula [Pb(L- C4H4O5)] (2) both with chiral structures, have been prepared strarting ...
Raman and infrared spectroscopic studies of the low- and high-temperature forms of octahalo cyclic phosphazene tetramers, P4N4Cl8 and P4N4F8

Varma, Vijay; Fernandes, J R; Rao, C N R (Elsevier Science BV, 1989-07)

Based on a study of the Raman and infrared spectra, normal vibrations of the low-temperature skew-tub (S4) and high-temperature Ci or C2h (skew-chair) forms of P4N4Cl8 have been assigned. A temperature variation study of ...
Investigations of iron-alumina metal-ceramic composites: Effect of ruthenium and nickel on the hydrogen reduction of trivalent iron during the formation of the composite

Verelst, M; Kannan, K R; Subbanna, G N; Rao, C N R; Brieu, M; Rousset, A (Pergamon-Elsevier Science Ltd, 1993-04)

Effect of ruthenium and nickel on the reduction behavior of Fe3+/Al2O3 to give the Fe-Al2O3 metal-ceramic composite has been studied by employing x-ray diffraction, 57Fe Mossbauer spectroscopy and electron microscopy. Both ...
A combined experimental and theoretical study of the charge-transfer compound between C60Br8 and tetrathiafulvalene

Rao, C N R; Govindaraj, A; Sumathy, R; Sood, A K (Taylor & Francis Ltd, 1996-09)

C60Br8, unlike C60Br6 and C60Cl6, forms a solid charge-transfer compound with tetrathiafulvalene (TTF), the composition being C60Br8(TTF)(8). The unique complex-forming property of C60Br8 can be understood on the basis of ...
Evolution Of Magnetic Order In The System Lani1-Xmnxo3 (x < 0.10)

Vasanthacharya, N Y; Raychaudhuri, A K; Ganguly, P; Rao, C N R (Elsevier Science BV, 1989)

Magnetic susceptibility measurements on dilute solid-solutions LaNi1-xMnxO3 (x < 0.1) have been carried out. With increasing x the magnetic susceptibility behaviour changes from Pauli paramagnetic to Curie-Weiss type. The ...
Oxyanion derivatives of cuprate superconductors - Superconducting 123 phosphates

Nagarajan, R; Ayyappan, S; Rao, C N R (Elsevier Science BV, 1994-01-10)

While YSr2Cu3O7 cannot be prepared under ambient conditions, partial substitution of the phosphate group for copper, as in YSr2Cu2.8(PO4)0.2Oy, stabilizes this phase in the orthorhombic structure, but the material is not ...
Orientational ordering in C70. Evidence for three distinct phase transitions

Ramasesha, Sheela K; Singh, A K; Seshadri, Ram; Sood, A K; Rao, C N R (Elsevier Science BV, 1994)

Variable-temperature X-ray diffraction studies of C70 suggest the occurrence of two phase transitions around 350 and 280 K where the high-temperature phase is fcc and the low-temperature phase is monoclinic, best described ...
Study Of The Electronic Structures Of High Tc Cuprate Superconductors By Electron Energy Loss And Secondary Electron Emission Spectroscopies

Jayaraman, K; Kulkarni, G U; Rao, C N R (Pergamon-Elsevier Science Ltd, 1989-10)

Energy loss spectra of superconducting YBa2Cu3O6.9' Bi1.5Pb0.5Ca2.5Sr1.5Cu3O10+δ and Tl2CaBa2Cu3O8 obtained at primary electron energies in the 170–310 eV range show features reflecting the commonalities in their electronic ...

Now showing items 101-120 of 892

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