Academy of Scientific and Innovation Research AcSIR

Delhi, India

Academy of Scientific and Innovation Research AcSIR

Delhi, India
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Jana M.,Indian Central Mechanical Engineering Research Institute | Jana M.,Academy of Scientific and Innovation Research AcSIR | Saha S.,Indian Central Mechanical Engineering Research Institute | Khanra P.,Chonbuk National University | And 4 more authors.
Materials Science and Engineering B: Solid-State Materials for Advanced Technology | Year: 2014

Green reduction of graphene oxide (GO) using drained water from soaked mung beans (Phaseolus aureus L.) has been demonstrated. In comparison to the toxic and hazardous reducing chemicals, the drained water from soaked mung beans (P. aureus L.) is completely green reducing agent, the reduction process is very simple and cost effective. The removal of oxygen containing functional groups of GO has been confirmed by UV-vis, Fourier transform infrared and X-ray photoelectron spectroscopy analysis. Morphological characterization of rGO has been performed by atomic force and transmission electron microscopy analysis. Electrochemical performances of rGO have been evaluated by cyclic voltammetry (CV), charge-discharge and electrochemical impedance spectroscopy techniques. The specific capacitance (SC) of rGO has been found to be 137 F g-1 at a current density of 1.3 A g-1. The retention in SC is more than 98% after 1000 charge-discharge cycles suggesting long-term electrochemical cyclic stability as supercapacitor electrode materials. © 2014 Elsevier B.V.


Kumar M.P.,Academy of Scientific and Innovation Research AcSIR | Kumar M.P.,Indian Central Mechanical Engineering Research Institute | Samanta P.,Indian Central Mechanical Engineering Research Institute | Murmu N.C.,Indian Central Mechanical Engineering Research Institute
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology | Year: 2015

Steady state characteristics of finite hydrostatic double layer porous oil journal bearing are investigated theoretically by incorporating tangential velocity slip at the porous-film interface given by Beavers-Joseph. The governing equations for flow in the porous medium and modified Reynolds equation in the film region are solved simultaneously using finite difference method. The effects of slip and design variables such as feeding parameter, bearing number, eccentricity ratio, slenderness ratio, and anisotropy of permeability have been investigated on bearing performance characteristics like load-carrying capacity, attitude angle, friction variable, and volume flowrate. The results are depicted in the form of graphs that can be utilized during design. © IMechE 2015.


Jana M.,Indian Central Mechanical Engineering Research Institute | Jana M.,Academy of Scientific and Innovation Research AcSIR | Khanra P.,Chonbuk National University | Murmu N.C.,Indian Central Mechanical Engineering Research Institute | And 3 more authors.
Physical Chemistry Chemical Physics | Year: 2014

A simple and effective method using 6-amino-4-hydroxy-2-naphthalenesulfonic acid (ANS) for the synthesis of water dispersible graphene has been described. Ultraviolet-visible (UV-vis) spectroscopy reveals that ANS-modified reduced graphene oxide (ANS-rGO) obeys Beers law at moderate concentrations. Fourier transform infrared and X-ray photoelectron spectroscopies provide quantitative information regarding the removal of oxygen functional groups from graphene oxide (GO) and the appearance of new functionalities in ANS-rGO. The electrochemical performances of ANS-rGO have been determined by cyclic voltammetry, charge-discharge and electrochemical impedance spectroscopy analysis. Charge-discharge experiments show that ANS-rGO is an outstanding supercapacitor electrode material due to its high specific capacitance (375 F g-1 at a current density of 1.3 A g-1) and very good electrochemical cyclic stability (∼97.5% retention in specific capacitance after 1000 charge-discharge cycles). ANS-rGO exhibits promising characteristics with a very high power density (1328 W kg-1) and energy density (213 W h kg-1). This journal is © the Partner Organisations 2014.


Kumar A.,Indian Central Mechanical Engineering Research Institute | Hens A.,Indian Central Mechanical Engineering Research Institute | Hens A.,Academy of Scientific and Innovation Research AcSIR | Arun R.K.,Indian Central Mechanical Engineering Research Institute | And 5 more authors.
Analyst | Year: 2015

A paper based microfluidic device is fabricated that can rapidly detect very low concentrations of uric acid (UA) using 3,5,3′,5′-tetramethyl benzidine (TMB), H2O2 and positively charged gold nanoparticles ((+)AuNPs). In the presence of (+)AuNPs, H2O2 reacts with TMB to produce a bluish-green colour which becomes colourless on reaction with UA. This colorimetric method can detect as low as 8.1 ppm of UA within <20 minutes on white filter paper. This technique provides an alternative way for UA detection. This journal is © The Royal Society of Chemistry 2015.


Arun R.K.,Indian Central Mechanical Engineering Research Institute | Arun R.K.,Academy of Scientific and Innovation Research AcSIR | Halder S.,Indian Central Mechanical Engineering Research Institute | Chanda N.,Indian Central Mechanical Engineering Research Institute | Chakraborty S.,Indian Institute of Technology Kharagpur
Lab on a Chip - Miniaturisation for Chemistry and Biology | Year: 2014

We develop a paper based fuel cell in which fluids flow through a capillary transport mechanism. The pencil stroked graphite electrodes take oxygen from quiescent air. This simple and efficient paper fuel cell can generate energy to the tune of 32 mW cm-2 over a prolonged duration of around 1000 minutes, and with the consumption of a very low volume of formic acid as fuel (~1 mL). © 2014 the Partner Organisations.

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