Vijayanandan, A.S.Mohan Balakrishnan, R.M.2026-02-052018Journal of Environmental Management, 2018, 218, , pp. 442-4503014797https://doi.org/10.1016/j.jenvman.2018.04.032https://idr.nitk.ac.in/handle/123456789/25077Metallic oxide nanoparticles have profound applications in electrochemical devices, supercapacitors, biosensors and batteries. Though four fungi were isolated from Nothapodytes foetida, Aspergillus nidulans was found to be suitable for synthesis of cobalt oxide nanoparticles, as it has proficient tolerance towards metal under study. The broth containing precursor solution and organism Aspergillus nidulans had changed from pink to orange indicating the formation of nanoparticles. Characterization by x-ray diffraction analysis (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and energy dispersive x-ray analysis (EDX) confirmed the formation of spinel cobalt oxide nanoparticles at an average size of 20.29 nm in spherical shape with sulfur-bearing proteins acting as a capping agent for the synthesized nanoparticles. The nanoparticles could be applied in energy storage, as a specific capacitance of 389 F/g showed competence. The study was a greener attempt to synthesize cobalt oxide nanoparticles using endophytic fungus. © 2018 Elsevier LtdAspergillusBiochemistryBiosynthesisCobalt compoundsEnergy dispersive X ray analysisFourier transform infrared spectroscopyHigh resolution transmission electron microscopyMetal nanoparticlesSulfurSurface plasmon resonanceX ray powder diffractionAspergillus nidulansCobalt oxide nanoparticlesElectrochemical batteriesElectrochemical supercapacitorEndophyteEndophytic fungusMetallic oxidesOxide nanoparticlesSulphur-bearing proteinSurface-plasmon resonanceProteinscobalt oxide nanoparticlenanoparticleunclassified drugcobaltcobalt oxidemetal nanoparticleoxideplant extractbiological productionendophyteenergy storagefungusligandparticle sizeproteinresonancetransmission electron microscopyX-ray diffractionArticlebiosynthesiscontrolled studyendophytic fungusenergy dispersive X ray spectroscopyfungus isolationinfrared spectroscopymetal tolerancenonhumanNothapodytes foetidaplantsurface plasmon resonanceultraviolet spectrophotometryX ray diffractionzeta potentialEmericella nidulansFungiCobaltMetal NanoparticlesNanoparticlesOxidesPlant ExtractsSpectroscopy, Fourier Transform InfraredX-Ray Diffraction