Editor, Author at Institute of Nano Electronic Engineering

Eco-friendly synthesis of Solanum trilobatum extract-capped silver nanoparticles is compatible with good antimicrobial activities

March 19, 2018 By Editor

Abstract – This study focused on the evaluation of antimicrobial activity of silver nanoparticles (AgNPs) after their green synthesis by means of a Solanum trilobatum bark extract. The obtained product with an intense surface plasmon resonance band at ∼442 nm with UV–visible spectroscopic analysis indicated the formation of AgNPs. The morphology of AgNPs was observed under transmission electron microscopy and field emission scanning electron microscopy, displayed that the eco-friendly synthesized AgNPs have a spherical shape with an average size of ∼25 nm in diameter. X-ray powder diffraction and selected area electron diffraction analyses confirmed that the AgNPs are crystalline in nature. Fourier transform infrared spectroscopy indicated that the AgNPs capped with active ingredients of the bark extract. X-ray photoelectron spectroscopy revealed elemental composition of the AgNPs. The performance of S. trilobatum bark extract-capped AgNPs in terms of inhibition of microbial growth was studied by disc diffusion and well diffusion assays. Eco-friendly synthesized S. trilobatum extract-capped AgNPs were found to possess enhanced antimicrobial properties: growth inhibition of gram-negative and gram-positive bacteria and of fungal species. These results demonstrated the potential applications of the indigenous medicinal plants to the field of nanotechnology.

Corresponding Author: Subash C B Gopinath
Corresponding Author’s Email: subash@unimap.edu.my

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Nanomaterials Research Talk

January 2, 2018 By Editor

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Reduced graphene oxide–multiwalled carbon nanotubes composites as sensing membrane electrodes for DNA detection

December 12, 2017 By Editor

Abstract – Thin films of reduced graphene oxide–multiwalled carbon nanotube (rGO–MWCNT) composites were demonstrated as sensing membrane electrodes for single-stranded DNA (ssDNA) detection. The morphology of the rGO–MWCNT composite thin films was observed via field emission scanning electron microscopy. The GO sheet and MWCNTs were clearly obtained, and the MWCNTs were uniformly distributed on the surface of the GO. The chemical bonding of the rGO–MWCNTs was examined using Fourier transform infrared spectroscopy. The element compositions of carbon, silicon, and oxygen were confirmed via energy-dispersive X-ray spectroscopy and X-ray powder diffraction analysis. The biosensor demonstrated high sensitivity to the ssDNA target with a linear range from 500 to 100 pM. Furthermore, the biosensor demonstrated good selectivity, reproducibility, and long-term stability for DNA detection. Since, the biosensor responded very-well and demonstrated excellent detection capabilities, it is highly recommended to be used in detecting specific biomarkers and other targeted proteins.

Corresponding Author: Ruslinda A. Rahim
Corresponding Author’s Email: ruslinda@unimap.edu.my

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2018 INEE Strategic Plan Workshop

December 4, 2017 By Editor

Date: Nov 25 & 26, 2017
Venue: Flamingo Hotel, Penang

2018 INEE Strategic Plan Workshop

Dr. Nuzaihan Won Bronze at PECIPTA’17

October 10, 2017 By Editor

Dr. Mohammad Nuzaihan has won a bronze medal in The International Conference and Exposition on Inventions by Institutions of Higher Learning [PECIPTA’17] in Terengganu, Malaysia recently with the project title “Molecular Gate Devices for Detection of Dengue Virus [DENV] at Femtomolar Concentration”.

Dr Nuzaihan