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Article
Ion-acoustic waves in magnetised plasma with nonthermal electrons and positrons
Zakharov–Kuznetsov (ZK) equation for ion-acoustic waves (IAWs) is derived using the reductive perturbation method (RPM) in magnetised plasma consisting of ions, positrons and nonthermal electrons in small but ...
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Article
Phase Formation in the Rapidly Solidified Al70−xGaxPd13Mn17 Alloys
In the present investigation, the effect of Ga substitution at Al site on the phase formation and stabilization of decagonal quasicrystalline phase in the rapidly solidified Al70−xGaxPd13Mn17 alloys have been stu...
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Article
Effect of carbon nanotube additive on the structural and thermal properties of Se85Te10Ag5 glassy alloy
Carbon nanotube (CNT) additive glassy composites [(Se85Te10Ag5)100−X(CNT)X] (X = 0, 3 and 5) have been prepared by melt-quenching technique. The purpose of the present work was to investigate the upshot of 3 and ...
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Article
Large amplitude ion-acoustic rarefactive and compressive solitons and double layers in a dusty plasma with finite ion temperature
Large amplitude ion-acoustic solitons and double layers are studied using Sagdeev’s pseudo potential technique in a collisionless unmagnetized plasma consisting of hot and cold Maxwellian electrons, warm adiab...
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Article
Highly zone-dependent synthesis of different carbon nanostructures using plasma-enhanced arc discharge technique
Three kinds of carbon nanostructures, i.e., graphene nanoflakes (GNFs), multi walled carbon nanotubes (MWCNTs), and spherical carbon nanoparticles (SCNPs) were comparatively investigated in one run experiment....
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Article
Influence of Ga Substitution on the Nature of Glasses in Zr69.5Al7.5-xGaxCu12Ni11 and Ce75Al25-xGax Metallic Glass Compositions
In this presentation, results of our recent investigations on the role of Ga on Al site in Zr69.5Al7.5-xGaxCu12Ni11 and Ce75Al25-xGax metallic glass compositions will be discussed. Ga like Al is normally expected...
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Chapter and Conference Paper
Enhanced Hole Transport in Polyfluorene Polymer by Using Hole Injection Layer
Hole transport in poly(9,9-dioctylfluorene) (PFO) are measured by performing current density- voltage (J-V) measurements as a function of temperatures. For the J–V measurements, F4TCNQ is used as hole injection l...
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Article
Open AccessModulational instability of ion-acoustic waves in electron–positron–ion plasmas
The stability of modulation of ion-acoustic waves in a collisionless electron–positron–ion plasma with warm adiabatic ions is studied. Using the Krylov–Bogoliubov–Mitropolosky (KBM) perturbation technique a no...
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Article
Synthesis and Indentation Behavior of Amorphous and Nanocrystalline Phases in Rapidly Quenched Cu–Ga–Mg–Ti and Cu–Al–Mg–Ti Alloys
Rapidly solidified ribbons of Cu–Ga–Mg–Ti and Cu–Al–Mg–Ti alloys show the formation of γ-brass type phase, which is an approximant of quasicrystals. The Cu–Ga–Mg–Ti alloy displays ordered γ-brass structure, w...
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Article
Synthesis of coal-derived single-walled carbon nanotube from coal by varying the ratio of Zr/Ni as bimetallic catalyst
In this paper coal, source has been used in place of graphite for synthesis of single-walled carbon nanotubes (SWCNTs) with new Zr/Ni bimetallic catalyst. Using coal as starting material to produce the high-va...
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Article
Phase formation in rapidly quenched Cu-based alloys
In the present investigation, we report the formation of γ-brass type phase in the rapidly quenched Cu50Ga30Mg5Ti15 and Cu50Al30Mg5Ti15 alloys. Rapid solidification of Cu50Ga30Mg5Ti15 alloy shows the formation of...
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Article
Synthesis, characterization and application of semiconducting oxide (Cu2O and ZnO) nanostructures
In the present study, we report the synthesis, characterization and application of nanostructured oxide materials. The oxide materials (Cu2O and ZnO) have been synthesized by electrolysis based oxidation and ther...
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Article
Indentation characteristics of rapidly solidified Al-Cu-V and Al-Cu-Ti alloys
We report indentation characteristics of metallic glasses and nano-composites in Al-Cu-V as well as in Al-Cu-Ti systems. The melt spun ribbons of these alloys are employed to study the surface hardness charact...
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Article
Nasal mucociliary clearance in health and disease
“Standard saccharine test is used to detect nasal mucociliary clearance time in healthy individuals both adults and children. The length of the nose was measured radiologically and with the help of a soft mall...
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Article
Glass transition kinetics of some Se-Te-Ag chalcogenide glasses
The present paper reports the Differential Scanning Calorimetric (DSC) study of some Ag doped Se-Te chalcogenide glasses. DSC runs were taken at different heating rates. Well-defined endothermic and exothermic...
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Article
Effect of annealing temperature on the structural-microstructural and electrical characteristics of thallium bearing HTSC films prepared by chemical spray pyrolysis technique
In order to get good quality reproducible films of Tl : HTSC system, we have studied the different annealing conditions to finally achieve the optimized annealing condition. In the present investigation, Tl-Ca...
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Article
Devitrification of rapidly quenched Al-Cu-Ti amorphous alloys
X-ray diffraction, transmission electron microscopy and differential scanning calorimetry were carried out to study the transformation from amorphous to icosahedral/crystalline phases in the rapidly quenched Al50
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Article
Effect of cationic size in Hg(Tl/Bi)Ba2Ca2Cu3O8+δ on superconducting and microstructural characteristics
In this paper we have reported investigations on the effect of simultaneous substitution of Bi and Tl at the Hg site in the oxygen deficient HgOδ layer of HgBa2Ca2Cu3O8+δ cuprate superconductor. Bulk polycrystall...
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Article
Role of Fe substitution and quenching rate on the formation of various quasicrystalline and related phases
We have investigated Fe substituted versions of the quasicrystalline (qc) alloy corresponding to Al65Cu20(Cr, Fe)15 with special reference to the possible occurrence of various quasicrystalline and related phases...
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Article
Nasopharyngeal angiofibroma (a report of 19 cases)
Nasopharyngeal Angiofibroma is a relatively rare benign, but locally aggresive tumor of the nasopharynx afflicting the adolescent males. The management of these tumors has been a subject of much interest and c...
