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

Now showing items 681-700 of 877

Understanding the Hydrogen Bond in Terms of the Location of the Bond Critical Point and the Geometry of the Lone Pairs

Ranganathan, Anupama; Kulkarni, G U; Rao, C N R (American Chemical Society, 2003-08-07)

The experimental charge density method has been employed to provide a more detailed description of the hydrogen bond in terms of the location of the bond critical point and the geometry of the lone pair of electrons. On ...
Photoluminescence spectra and ferromagnetic properties of GaMnN nanowires

Deepak, F L; Vanitha, P V; Govindaraj, A; Rao, C N R (Elsevier Science BV, 2003-06-11)

Mn-doped GaN nanowires have been prepared by reacting a mixture of acetylacetonates with NH3 at 950 degreesC in the presence of multi-walled (MWNTs) and single-walled (SWNTs) carbon nanotubes, the nanowires prepared with ...
Inorganic nanotubes

Rao, C N R; Nath, Manashi (Royal Society of Chemistry, 2003)

Carbon nanotubes were discovered in 1991. It was soon recognized that layered metal dichalcogenides such as MoS2 could also form fullerene and nanotube type structures, and the first synthesis was reported in 1992. Since ...
Hydrogen storage in carbon nanotubes and related materials

Gundiah, Gautam; Govindaraj, A; Rajalakshmi, N; Dhathathreyan, K S; Rao, C N R (Royal Society of Chemistry, 2003)

Adsorption of hydrogen at 300 K has been investigated on well-characterized samples of carbon nanotubes, besides carbon fibres by taking care to avoid many of the pitfalls generally encountered in such measurements. The ...
A systematic study of four series of electron-doped rare earth manganates, Ln(x)Ca(1-x)MnO(3) (Ln = La, Nd, Gd and Y) over the x=0.02-0.25 composition range

Sudheendra, L; Raju, A R; Rao, C N R (IOP Publishing Ltd, 2003-02-19)

Electrical and magnetic properties of four series of manganates Ln(x)Ca(1-x)MnO(3) (Ln = La, Nd, Gd and Y) have been studied in the electron-doped regime (x = 0.02-0.25) in order to investigate the various inter-dependent ...
Stripes and Superconductivity in Cuprates - Is there a Connection?

Kumar, N; Rao, C N R (WILEY-VCH Verlag GmbH, 2003-04-14)

No stars but stripes are known to occur in cuprate superconductors (see picture) and there has been an implicit belief that stripes play a seminal role in superconductivity. Based on recent experiments, it now appears that ...
Films of Metal Nanocrystals Formed at Aqueous-Organic Interfaces

Rao, C N R; Kulkarni, G U; Thomas, P John; Agrawal, Ved Varun; Saravanan, P (American Chemical Society, 2003-07-31)

Nanocrystalline films of Au, Ag, and Cu have been prepared at the toluene-water interface by the interaction of metal-triphenylphosphine complexes in the organic layer with partially hydrolyzed tetrakishydroxymethylphosphonium ...
A solvothermal route to CdS nanocrystals

Gautam, Ujjal K; Seshadri, Ram; Rao, C N R (Elsevier Science BV, 2003-07-10)

A novel solvothermal route for the preparation of organic soluble CdS nanocrystals, involving the reaction of cadmium stearate with sulfur in the presence of tetralin has been described. Tetralin in the presence of S gives ...
Organically Templated Linear and Layered Iron Sulfates

Paul, Geo; Choudhury, Amitava; Rao, C N R (American Chemical Society, 2003-03-11)

Linear and layered organically templated iron sulfates have been prepared under hydrothermal conditions. The linear iron sulfates, with the compositions [H3N(CH2)(2)NH3][FeF3(SO4)], I, [C(NH2)(3)](2)[FeF(SO4)(2)], II, ...
Aliphatic dicarboxylates with three-dimensional metal-organic frameworks possessing hydrophobic channels

Vaidhyanathan, Ramanathan; Natarajan, Srinivasan; Rao, C N R (Royal Society Chemistry, 2003)

Two three-dimensional open-framework metal dicarboxylates possessing channels with a hydrophobic environment have been synthesized. One is a malonate of the formula, [Cd(O2C-CH2-CO2)(H2O)].H2O, I, and the other a glutarate ...
Understanding the building-up process of three dimensional open-framework metal phosphates: Acid degradation of the 3D structures to lower dimensional structures

Choudhury, Amitava; Rao, C N R (Royal Society of Chemistry, 2003)

Acid degradation of 3D zinc phosphates primarily yields a one-dimensional ladder compound, an observation that is significant considering that the latter forms 3D structures on heating in water.
Transformation of a 4-membered ring zinc phosphate SBU to a sodalite-related 3-dimensional structure through a linear chain structure

Dan, Meenakshi; Udayakumara, D; Rao, C N R (Royal Society of Chemistry, 2003)

A zero-dimensional zinc phosphate, comprising a 4-membered ring, is shown to spontaneously transform at room temperature, to a linear chain structure consisting of corner-shared 4-membered rings, the latter transforming ...
Phase Separation In Metal Oxides

Rao, C N R; Vanitha, P V; Cheetham, Anthony K (WILEY-VCH Verlag GmbH, 2003-02-17)

A fascinating phenomenon, recently found to occur in certain transition-metal oxides, is phase separation wherein pure, nominally monophasic oxides of transition metals with well-defined compositions separate into two or ...
Organically templated three-dimensional open-framework metal selenites with a diamondoid network

Udayakumar, D; Rao, C N R (Royal Society of Chemistry, 2003)

Three-dimensional open-framework metal selenites of the formula, [H2N(CH2)(4)NH2](0.5)[M(HSeO3)(Se2O5)] (M = Zn, Co or Ni), containing both selenite and diselenite units and intersecting 10-membered channels, have been ...
Solvothermal Synthesis of a Layered Open-Framework Chlorocadmium Oxalate, Cd2(C2O4)0.5Cl3NaCl·4H2O

Vaidhyanathan, R; Natarajan, Srinivasan; Rao, C N R (WILEY-VCH Verlag GmbH, 2003-05)

The metathesis reaction between CdCl2.2H(2)O and sodium oxalate in n-hexanol under solvothermal conditions yields a hybrid compound of formula Cd-2(C2O4)(0.5)Cl3NaCl.4H(2)O, It consists of one-dimensional chains formed by ...
Nanocrystals of metals, semiconductors and oxides: Novel synthesis and applications

Rao, C N R; Kulkarni, G U; Thomas, P John; Agrawal, Ved Varun; Gautam, Ujjal K; Ghosh, Moumita (Current Science Association, 2003-10-10)

Films of nanocrystals such as Au, Ag and Pd, semiconducting sulphides such as CdS, ZnS and CoS, and oxides such as Fe2O3 and CuO have been prepared by employing reactions at liquid-liquid (organic-aqueous) interfaces. In ...
Solution processed reduced graphene oxide ultraviolet detector

Chitara, Basant; Krupanidhi, S B; Rao, C N R (American Institute of Physics, 2011-09-12)

Electronic properties of graphene have been studied more extensively than its photonic applications, in spite of its exciting optical properties. Recent results on solar cells, light emitting diodes and photodetectors show ...
A strategy for the synthesis of nanocrystal films of metal chalcogenides and oxides by employing the liquid-liquid interface

Gautam, Ujjal K; Ghosh, Moumita; Rao, C N R (Elsevier Science BV, 2003-11-04)

The interface between water and an organic liquid has been exploited to prepare nanocrystals of US. The technique involves introducing an appropriate precursor of cadmium in the organic layer and the sulfiding reagent in ...
Metal Carboxylates With Open Architectures

Rao, C N R; Natarajan, Srinivasan; Vaidhyanathan, R (WILEY-Blackwell, 2004)

The field of inorganic open-framework materials is dominated by aluminosilicates and phosphates. The metal carboxylates have emerged as an important family in the last few years. This family includes not only mono- and ...
New Solvothermal Routes for GaN Nanocrystals

Sardar, K; Rao, C N R (WILEY-VCH Verlag GmbH, 2004-03-05)

GaN nanocrystals (see Figure) of hexagonal structure and varying diameters have been prepared by the reaction of hexamethyldisilazane (HMDS) with gallium cupferron or GaCl3 under solvothermal conditions. The nanocrystals ...

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