A comparative study on NiO nanocrystal modified graphite and Au electrode matrices as immobilization supports for laccase enzyme in amperometric biosensing for catechol detection

C. Sarika; M.S. Shivakumar; Lakhirupa Devi; K. Rekha; B. Narasimhamurthy; Sabu Thomas; Nandakumar Kalarikkal; I. C. Lekshmi

Volume 3, Issue 5 , 2018, Pages 304-311


  A comparative study of the electrochemical behaviours of two different electrode matrices used in the construction of amperometric laccase biosensors is reported here for catechol detection in water. The matrices considered are NiO nanocrystal (NC) modified graphite electrode (MCPE-NiO) and Au electrode ...  Read More

Sputtered nanostructured single crystalline cu doped ZnO thin films for carbon monoxide gas sensing applications

Pawan Kumar; Amit Sanger; Arvind Kumar; Davinder Kaur; Ramesh Chandra

Volume 3, Issue 5 , 2018, Pages 312-317


  In the present work, gas sensing properties of Copper (Cu) doped Zinc Oxide (ZnO) thin films have been investigated. The nanostructured ZnO and Cu doped ZnO (CZO) thin films have been synthesized using DC magnetron sputtering on glass substrates. The effect of hydrophobicity and surface roughness of ...  Read More

Electrochemical glucose biosensor based on biosynthesized silver nanoparticles and polyvinylpyrolidone modified graphite electrode

S Sandeep; S SanthoshA; N Kumara Swamy; G S Suresh; J S Melo

Volume 3, Issue 5 , 2018, Pages 318-323


  In the present work, we have biosynthesized silver nanoparticles (AgNPs) using leaf extract of Euphorbia geniculata and successfully deposited them onto the polyvinyl pyrolidone (PVP) modified graphite electrode (Gr/PVP). The resulting electrode is used as a matrix for the immobilization of glucose oxidase ...  Read More

A novel route for large-scale synthesis silver nanoparticles using Uncaria tomentosa leaves extract: Antibacterial activity

Nidá M. Salem; Saba H. Alkharabsheh; Akl M. Awwad

Volume 3, Issue 5 , 2018, Pages 324-327


  The present study deals with rapid and large-scale synthesis of silver nanoparticles (AgNPs) by U. tomentosa leaves aqueous extract at ambient temperature. Crystal growth of silver nanoparticles by this green route was formed within 5min at room temperature. Synthesized AgNPs were characterized by Ultra-violet ...  Read More

Band gap engineered Nb2O5 thin films fabricated from sol-gel processed modified precursors for enhanced photocatalytic activity: A comparative study

Mohammad Danish; Ashutosh Pandey

Volume 3, Issue 5 , 2018, Pages 328-334


  Reactions of niobium (V) ethoxide (1) with 2,4-pentanedione derivatives [3-Chloro-2,4-pentanedione, 1,1,1-Trifluoro-2, 4 pentanedione, 3,3-Dimethyl-2,4-pentanedione,] afforded heteroleptic niobium alkoxide complexes [Nb(OEt)4 (CH3COCHClCOCH3)](2), [Nb(OEt)4(CF3COCH2COCH3)] (3) and  [Nb(OEt)4(CH3COC(CH3)2COCH3)] ...  Read More

Experimental study on performance characteristics of Ni-rich NiTi shape memory alloy in wire electric discharge machining (WEDM)

Himanshu Bisaria; Pragya Shandilya

Volume 3, Issue 5 , 2018, Pages 335-339


  Ni-rich NiTi shape memory alloys (SMAs) are gaining more prominence compared to near equiatomic NiTi SMAs due to their excellent superelasticity and shape memory properties. The low density and high work output compared to steels make them an excellent choice for automotive and aerospace industries. ...  Read More

Hybrid effect of the activated carbon and the CuO catalyst on vegetable oil steam reforming

I.N.G. Wardana

Volume 3, Issue 5 , 2018, Pages 340-343


  This study aims to utilize of bio material to produce green hydrogen energy through hybrid of the activated carbon and the CuO catalyst in vegetable oil steam reformer. The experiment was done in the atmospheric pressure steam reformer. The results show that activated carbon and CuO individually performs ...  Read More

Deformation mechanisms that explain the combination of high plasticity and strength in steels wires with extreme carbon content

Elena Brandaleze; Mykhaylo Romanyuk; Martina Avalos

Volume 3, Issue 5 , 2018, Pages 344-350


  The alloy design concepts of high performance steels, involve the knowledge on the stability of carbides associated with nanoscale phenomena present in the structure as result of the deformation suffered during the thermomechanical processes. The understanding of the nanoscale phenomena open new frontiers ...  Read More

Density functional study of metal to half-metal transition in the rutile vanadium dioxide VO2

Sarajit Biswas

Volume 3, Issue 5 , 2018, Pages 351-355


  First principles electronic structure calculations implemented in the density functional theory have been employed to investigate the electronic and magnetic properties of VO2 in the high temperature rutile structure with tetragonal P42/mnm symmetry. The system is a nonmagnetic metal in the absence of ...  Read More

Influence of electroplating stages on hydrogen pickup in SAE 1005 steel

María N. Delpupo; Mariano N. Inés; Graciela A. Mansilla

Volume 3, Issue 5 , 2018, Pages 356-360


  Hydrogen embrittlement is a common, dangerous, but poorly understood cause of failure in metals and alloys. In coated samples, coatings act as a barrier to hydrogen damage resulting in a decrease in the corrosion rate and consequently reducing hydrogen embrittlement. In order to obtain an effective barrier ...  Read More

Reduction in optical reflection at intermediate adhesive layer for mechanically stacked multi junction solar cells

Toshiyuki Sameshima; Yoshihiro Ogawa; Masahiko Hasumi

Volume 3, Issue 5 , 2018, Pages 361-365


  Reduction of optical reflection loss at the intermediate region is discussed in three mechanical stacked samples: top Si and bottom Ge substrates, top GaAs and bottom Si substrates, and top GaP and bottom Si substrates using an epoxy-type adhesive with a reflective index of 1.47. Transparent conductive ...  Read More

Research Article
Photodetection of modulated light of white RGB LEDs with a-SiC:H device

Paula Louro; Manuela Vieira; Manuel A. Vieira; J. Costa

Volume 3, Issue 5 , 2018, Pages 366-371


  We propose the use of Visible Light Communication (VLC) for localization services and navigations. The proposed lighting system supplies the dual function of lighting and data transmission. It uses commercial RGB white LEDs for the generation of the light and of the modulated optical signals that are ...  Read More