Abstract
Gold nanoparticles (AuNPs) attracted much attention owing to their distinguished characteristics and applications. In this study, rod-shaped AuNPs were biosynthesized using Pb2+-induced fungus Aspergillus sp. The synthesized AuNPs showed a UV–vis absorption peak at 534 nm. Scanning electron microscopy and transmission electron microscopy analyses showed that rod-shaped AuNPs were biosynthesized and attached on the mycelia surfaces. Energy-dispersive spectrometer analysis identified gold as the unique metallic composition of synthesized nanoparticles. X-ray powder diffraction analysis showed that the AuNPs were face-centered cubic crystalline structure. Furthermore, Fourier transform infrared spectroscopy analysis detected functional groups, including C = O, C–O–C, amine I and II which played active roles in AuNPs formation. In addition, the main shape of synthesized AuNPs changed from sphere to rod-shape with the increase of biomass and Pb2+ concentration. This study reports quite uniform rod-shaped AuNPs biosynthesized using Pb2+-induced fungus Aspergillus sp. WL-Au for the first time. This will provide a valid alternative for oriented biosynthesis of AuNPs.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 51508068), the Program for New Century Excellent Talents in University (No. NCET-13–0077), the Fundamental Research Funds for the Central Universities (No. DUT14YQ107), and the Open Project of State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (No. ESK201529).
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Qu, Y., Lian, S., Shen, W. et al. Rod-shaped gold nanoparticles biosynthesized using Pb2+-induced fungus Aspergillus sp. WL-Au. Bioprocess Biosyst Eng 43, 123–131 (2020). https://doi.org/10.1007/s00449-019-02210-w
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DOI: https://doi.org/10.1007/s00449-019-02210-w