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Sukalyan Dash

Bio: Sukalyan Dash is an academic researcher from National Institute of Technology, Rourkela. The author has contributed to research in topics: Dielectric resonator antenna & Dielectric. The author has an hindex of 24, co-authored 137 publications receiving 2682 citations. Previous affiliations of Sukalyan Dash include University College of Engineering & Southern University of Science and Technology.


Papers
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TL;DR: The adsorption behaviour of various organic adsorbates on silica surface is reviewed and some natural macromolecules like proteins and nucleic acids are investigated to study the hydrophobic and hydrophilic binding sites of silica.

614 citations

Journal ArticleDOI
TL;DR: In this article, alcohols and olefinic compounds undergo oxidation by permanganate through the formation of a substrate-Mn(VII) complex, which finally decomposes to give the desired products.

232 citations

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TL;DR: In this article, the nucleation and growth of twins in a 78% Ni-Fe alloy were investigated by electron transmission microscopy, and it was pointed out that annealing twins occur without a shape change, and consequently, the a1/6<112= partial dislocations which produce the stacking faults are equally distributed among the three partial dislations which are glissile in the same twinning plane.

185 citations

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TL;DR: The systems containing anionic, cationic, nonionic surfactants as well as microemulsions have been reviewed with respect to their clouding phenomena and the effects of structural variation in the surfactant systems have been incorporated.

158 citations

Journal ArticleDOI
TL;DR: The structure, adsorption behavior and applications of eggshell waste materials have been reviewed, and the pore structure as well as the surface geometry of the materials leading to its multifarious applicability is discussed.

132 citations


Cited by
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Journal ArticleDOI
01 Mar 2013-Carbon
TL;DR: In this article, the formation of different types of oxygen containing functional groups in GO and their influences on its structure were analyzed using X-ray diffraction (XRD), Fourier transform infra-red spectra, x-ray photoelectron spectra (XPS), zeta potential analysis and Raman spectroscopy.

1,428 citations

Journal ArticleDOI
TL;DR: In this paper, the synthesis of silica nanoparticles, characterization on size-dependent properties, and surface modification for the preparation of homogeneous nanocomposites, generally by sol-gel technique are discussed.
Abstract: Application of silica nanoparticles as fillers in the preparation of nanocomposite of polymers has drawnmuch attention, due to the increased demand for new materials with improved thermal, mechanical, physical, and chemical properties. Recent developments in the synthesis of monodispersed, narrow-size distribution of nanoparticles by sol-gel method provide significant boost to development of silica-polymer nanocomposites. This paper is written by emphasizing on the synthesis of silica nanoparticles, characterization on size-dependent properties, and surface modification for the preparation of homogeneous nanocomposites, generally by sol-gel technique. The effect of nanosilica on the properties of various types of silica-polymer composites is also summarized.

840 citations

Journal ArticleDOI
01 May 2007-Chest
TL;DR: New longitudinal epidemiologic and genetic studies are required to evaluate the role of smoking itself and possible gene/environment interplay in initiation and development of smoking-induced common diseases affecting humans.

838 citations

Journal ArticleDOI
TL;DR: The ability to tune the selectivity of graphene through controlled generation of subnanometer pores addresses a significant challenge in the development of advanced nanoporous graphene membranes for nanofiltration, desalination, gas separation, and other applications.
Abstract: We report selective ionic transport through controlled, high-density, subnanometer diameter pores in macroscopic single-layer graphene membranes. Isolated, reactive defects were first introduced into the graphene lattice through ion bombardment and subsequently enlarged by oxidative etching into permeable pores with diameters of 0.40 ± 0.24 nm and densities exceeding 1012 cm–2, while retaining structural integrity of the graphene. Transport measurements across ion-irradiated graphene membranes subjected to in situ etching revealed that the created pores were cation-selective at short oxidation times, consistent with electrostatic repulsion from negatively charged functional groups terminating the pore edges. At longer oxidation times, the pores allowed transport of salt but prevented the transport of a larger organic molecule, indicative of steric size exclusion. The ability to tune the selectivity of graphene through controlled generation of subnanometer pores addresses a significant challenge in the dev...

706 citations

Journal ArticleDOI
TL;DR: In this paper, an eco-friendly graphene oxide-chitosan (GO-CS) hydrogel was used as a new type of adsorbent for water purification.
Abstract: Water pollution is one of the most pervasive problems afflicting people throughout the world, while adsorption is the most widely used method to remove the contaminants from water. Here, in this paper, we report an eco-friendly graphene oxide–chitosan (GO–CS) hydrogel as a new type of adsorbent for water purification. The GO–CS hydrogels were prepared via self-assembly of GO sheets and CS chains. A three-dimensional network composed of GO sheets crosslinked by CS was found in GO–CS hydrogels. The GO–CS composite hydrogels showed high adsorption capacity towards different contaminants, including cationic and anionic dyes, as well as heavy metal ions. The mechanism of the dye adsorption was investigated with a spectral method, and an electrostatic interaction was found to be the major interaction between ionic dyes and the hydrogel. The influence of the hydrogel composition on the adsorption capacity towards different adsorbates was also studied. Finally, it was demonstrated that the GO–CS hydrogel can be used as column packing, to fabricate a column for water purification by filtration.

574 citations