Sandeep Kumar Marka

ORCID: 0000-0003-4112-0482
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About
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Research Areas
  • Advancements in Battery Materials
  • Graphene research and applications
  • Electromagnetic wave absorption materials
  • Supercapacitor Materials and Fabrication
  • Semiconductor materials and interfaces
  • Boron and Carbon Nanomaterials Research
  • Dielectric materials and actuators
  • Advanced Antenna and Metasurface Technologies
  • Metal and Thin Film Mechanics
  • Advanced Battery Technologies Research
  • Extraction and Separation Processes
  • Semiconductor materials and devices
  • Copper-based nanomaterials and applications
  • Transition Metal Oxide Nanomaterials
  • Diamond and Carbon-based Materials Research
  • Advanced Battery Materials and Technologies
  • Quantum Dots Synthesis And Properties
  • Electromagnetic Compatibility and Measurements
  • Ga2O3 and related materials
  • Polymer Nanocomposite Synthesis and Irradiation
  • Ferroelectric and Piezoelectric Materials
  • ZnO doping and properties

University of Hyderabad
2012-2023

National University of Singapore
2015-2023

Exfoliated graphene oxide (EG)/MoO2 composites are synthesized by a simple solid-state graphenothermal reduction method. Graphene (GO) is used as reducing agent to reduce MoO3 and source for EG. The formation of different submicron sized morphologies such spheres, rods, flowers, etc., monoclinic MoO2 on EG surfaces confirmed complementary characterization techniques. As-synthesized EG/MoO2 composite with higher weight percentage performed excellently an anode material in lithium-ion...

10.1021/acsami.6b02049 article EN ACS Applied Materials & Interfaces 2016-04-09

An excellent electromagnetic interference shielding effectiveness of ∼19.5 dB was measured for a 1 mm thick flexible few-layered graphene (FLG)/PVA composite sheet owing to the formation network-like features by FLG in PVA matrix.

10.1039/c5ra04038h article EN RSC Advances 2015-01-01

Easy solid state synthesis of Co<sub>2</sub>Mo<sub>3</sub>O<sub>8</sub>/reduced graphene oxide composite which exhibited a very high specific capacity (∼954 mA h g<sup>−1</sup>) when tested as an anode material in lithium ion batteries.

10.1039/c6ra10192e article EN RSC Advances 2016-01-01

Different amounts of graphene-wrapped magnesium oxide (G@MgO) powders are uniformly dispersed in poly(vinyl alcohol) (PVA) solution different experiments to obtain solutions which coagulated solid materials, then hot pressed at 413 K and 3 t pressure finally 1 mm thick freestanding G@MgO/PVA composite sheets the constituents, namely, graphene MgO (in form G@MgO), nanofillers PVA matrix. During synthesis G@MgO powder, nanoparticles situ wrapped by nanosheets as revealed electron microscopy....

10.1021/acsami.9b05137 article EN ACS Applied Materials & Interfaces 2019-06-03

We have used pulsed-laser deposition, following a specific sequence of heating and cooling phases, to grow ZnO nanorods on buffer/Si(100) substrates, in 600 mT oxygen ambient, without catalyst. In these conditions, the preferentially self-organize form vertically aligned, core/shell structures. X-ray diffraction analyses, obtained from 2θ–ω pole figure scans, shows crystalline (wurtzite) deposit with uniform c-axis orientation normal substrate. Field emission scanning electron microscopy,...

10.1021/jp511783c article EN The Journal of Physical Chemistry C 2015-02-12

This review article discusses about various aspects that make graphene and nanosheets/binary transition metal oxide (GNS/BTMO) composites apt for their use as anode materials in lithium ion batteries (LIB). GNS/BTMO are categorized into three types based on the type of local contact between GNS BTMO composites. These zero-dimensional, one-dimensional two-dimensional which elaborately explained this article. Amongst type, two dimensional show superior electrochemical properties (suitable...

10.2174/2210681205666151030214409 article EN Nanoscience &amp Nanotechnology-Asia 2015-11-23

Lithium triniobate (LiNb3O8) has been prepared using microwave assisted combustion synthesis at a low temperature of 400 °C. Graphite oxide is synthesized Hummers method and thereafter it thermally exfoliated 500 700 °C to obtain two samples Few Layered Graphene (FLG). Then, FLG-LiNb3O8 composites through simple ultra-sonication solution mixing process. The obtained are named as FLN5 FLN7 based on the used FLG. Low frequency dielectric measurements recorded for both measured constant...

10.1063/1.4929201 article EN AIP conference proceedings 2015-01-01
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