Low-temperature microwave-assisted synthesis and antifungal activity of CoFe2O4 nanoparticles

Low-temperature microwave-assisted synthesis and antifungal activity of CoFe2O4 nanoparticles


Published in Journal of Materials NanoScience

  • T. R. Ravikumar Naik Indian Institute of Science
  • Naveen Joshi Indian Institute of Science
  • S.A. Shivashankar Indian Institute of Science
  • P.J. Bindu Indian Institute of Science

Keywords: Microwave, cobalt ferrite, nanocrystalline, metal, complex


Nanoparticle ferrite with chemical formula CoFe2O4 was prepared from the Co (II) and Fe (III) 3-acetyl-4-hydroxy-coumarin metal complexes by solution based one-pot microwave assisted technique. Single phase structure of CoFe2O4 ferrites nanoparticles was confirmed using FTIR, XRD, SEM, and EDX analysis. Transmission Electron Microscope (TEM) showed that the particle size of the samples in the range of (15 nm). The hysteresis studies showed ferromagnetic behaviour at room temperature. The antifungal activity of CoFe2O4 nanoparticle was investigated against A.flavus and A. niger by employing disc diffusion method. According to the results obtained, CoFe2O4 is a potential material for antifungal diseases. The CoFe2O4 nanoparticles could be readily separated from water solution after the disinfection process by applying an external magnetic field.

How to Cite Naik, T. R. R., Joshi, N., Shivashankar, S., & Bindu, P. (2019). Low-temperature microwave-assisted synthesis and antifungal activity of CoFe2O4 nanoparticles. Journal of Materials NanoScience, 6(2), 67-72.

Retrieved full text from http://pubs.thesciencein.org/journal/index.php/jmns/article/view/108

Haryana Vigyan Ratan Award 2019

It is a pride moment for ScienceIn family, editors, scientists and researchers that Dr. Rajender S Varma, the editor of JMNS and emeritus scientist, Environmental Protection Agency, USA has been awarded Haryana Vigyan Ratan Award (translation: Haryana Science Jewel Award) 2017 on February 28, 2019 at Haryana Raj Bhawan, Chandigarh. Dr. Varma has been given this recognition for his enormous research contribution in Green Chemistry, Catalysis, NanoScience-nanomaterials, nanochemistry, nanocatalysis. Prof. Rajender (Raj) S. Varma did Ph.D. from Delhi University in 1976. He is Editor of Journal of Materials NanoScience, advisory board member of several international journals and has published over 470 scientific papers and awarded 16 US Patents, 8 books, 27 book chapters and 3 encyclopedia contributions with over ~ 31,000 citations. He is highly accomplished researcher with high citations to his work having H -Index 96. Dr. Varma hail from a village in haryana (now in punjab). On receiving the award he said “It is a proud moment for a country boy”. It is a highest award from state government for scientists.

The Department of Science and Technology Haryana Government has instituted a highest honour for the contributions in field of scientific research with title “Haryana Vigya Ratan” to honor and acknowledge the contributions of researchers from Haryana and “Haryana Yuva Vigyan” Award for the recognition of young scientists.

Dr. Varma is editing a special section/issue on Nanochemistry and Nanocatalysis , researchers working in the field can contribute their research findings (research articles or review articles ) for consideration in the special section of the journal. More details available on Dr. Varma’s Nanochemistry special section Editor.

Dr. RS Varma receiving award from Governor of Haryana.

Haryana Vigyan Ratan Award Citation for Dr. RS Varma, Scientist EPA for contribution in Nanocatalysis, Green Chemistry

Conductive polymer nanocomposite enzyme immobilized biosensor for pesticide detection

Conductive polymer nanocomposite enzyme immobilized biosensor for pesticide detection


  • Priyanka D Virutkar Rashtrasant Tukadoji Maharaj Nagpur University
  • Ashish P Mahajan Rashtrasant Tukadoji Maharaj Nagpur University
  • Bhavna H Meshram Rashtrasant Tukadoji Maharaj Nagpur University
  • Subhash B Kondawar Rashtrasant Tukadoji Maharaj Nagpur University

Keywords: Carbon nanotubes, Acetylcholinesterase, Pesticides, Biosensors


Conductive carbon nanotubes based polyaniline/polypyrrole polymer nanocomposite (CNT-PANI-PPy) film was electrochemically synthesized on graphite electrode using cyclic voltammetry. CNT-PANI-PPy film formed a biocompatible environment to entrap enzyme molecule and used as biosensor for pesticide detection. This study shows that enzyme based conductive polymer nanocomposite film itself acts as a mediator. Carbon nanotubes promote electron transfer reactions in presence of Acetythiocholine chloride (ATCl) as a substrate at a lower potential and catalyzed the electrochemical oxidation of enzymatically formed thiocholine. Surface morphology was studied by scanning electron microscopy which shows a porous structure of the modified film beneficial for enzyme immobilization. Electrochemical behavior of the fabricated electrodes evaluated through cyclic voltammetry and electrochemical impedance spectroscopy. The detection of pesticide (acephate) was performed by chronoamperometry and the limit of detection (LOD) of acephate was found to be 0.007 ppm concentration which is quite low.

Full text at: http://pubs.thesciencein.org/journal/index.php/jmns/article/view/84