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Mycocrystallization of gold ions by the fungus Cylindrocladium floridanum

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Abstract

The size and morphology determines the thermodynamic, physical and electronic properties of metal nanoparticles. The extracellular synthesis of gold nanoparticles by fungus, Cylindrocladium floridanum, which acts as a source of reducing and stabilizing agent has been described. The synthesized nanoparticles were characterized using techniques such as UV–Vis spectroscopy, X-ray diffraction (XRD), scanning electron microscopy, energy dispersive X-ray analysis (EDAX), and high-resolution transmission electron microscopy (HR-TEM). Based on the evidence of HR-TEM, the synthesized particles were found to be spherical with an average size of 19.05 nm. Powder XRD pattern proved the formation of (111)-oriented face-centered cubic crystals of metallic gold. This microbial approach by fungus for the green synthesis of spherical gold nanoparticles has many advantages such as economic viability, scaling up and environment friendliness.

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Acknowledgments

We thank the Council of Scientific and Industrial Research (CSIR) and Department of Science and Technology (DST), Government of India for financial support through funds for improvement of science and technology infrastructure in various universities and higher educational institutions (FIST) Programme coordinated by Prof. N. Sakthivel. We also thank Central Instrumentation Facility (CIF), Pondicherry University for research facilities.

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Authors and Affiliations

  1. Department of Biotechnology, School of Life Sciences, Pondicherry University, Kalapet, 605 014, Puducherry, India

    Kannan Badri Narayanan & Natarajan Sakthivel

  2. School of Biotechnology, Graduate School of Biochemistry, and Research Institute of Protein Sensor, Yeungnam University, Gyeongsan, 712 749, South Korea

    Kannan Badri Narayanan

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  1. Kannan Badri Narayanan
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  2. Natarajan Sakthivel
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Correspondence to Natarajan Sakthivel.

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Narayanan, K.B., Sakthivel, N. Mycocrystallization of gold ions by the fungus Cylindrocladium floridanum . World J Microbiol Biotechnol 29, 2207–2211 (2013). https://doi.org/10.1007/s11274-013-1379-0

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  • DOI: https://doi.org/10.1007/s11274-013-1379-0

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