Biosynthesized gold nanoparticles-doped hydroxyapatite as antibacterial and antioxidant nanocomposite

Fatimah, Is and Citradewi, Putwi Widya and Yahya, Amri and Nugroho, Bambang Hernawan and Hidayat, Habibi and Purwiandono, Gani and Sagadevan, Suresh and Ghazali, Sheikh Ahmad Izaddin Sheikh Mohd and Ibrahim, Shariff (2021) Biosynthesized gold nanoparticles-doped hydroxyapatite as antibacterial and antioxidant nanocomposite. Materials Research Express, 8 (11). ISSN 2053-1591, DOI

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A composite of hydroxyapatite (HA) doped with green synthesized gold nanoparticles (Au NPs) was prepared. Au NPs were produced via the bioreduction of HAuCl4 with Clitoria ternatea flower extract and utilized in HA synthesis, using Ca(OH)(2) and ammonium diphosphate as precursors. The aim of this research was to analyze the structure of the composite and conduct an antibacterial activity test involving Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, and Streptococcus pyogenes. In addition, antioxidant activity was evaluated by 2,2-diphenyl-1-picrylhydrazyl radical scavenging. Au NP formation monitoring was conducted by UV-visible spectroscopy and particle size analysis, and the synthesized composite was studied using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The results revealed homogeneously dispersed Au NPs (particle size ranging from 5 to 80 nm) in the HA structure. The nanocomposite demonstrated enhanced antibacterial activity against the tested bacteria compared to HA, with minimum inhibition concentrations of 3 mu g ml(-1) for E.coli and S.aureus and 10 mu g ml(-1) for K. pneumoniae and S. pyogenes. The nanocomposite expressed antioxidant activity, as shown by 2,2-diphenyl-1-picrylhydrazyl scavenging activities of 66% and 58% at concentrations of 100 mu g ml(-1) and 50 mu g ml(-1), respectively.

Item Type: Article
Funders: Kementrian Riset-Badan Riset Nasional, Republic of Indonesia via Hibah Penelitian Dasar Unggulan Perguruan Tinggi[011/DirDPPM/70/DPPM/PDUPT - KEMDIKBUDRISTEK/VII/2021]
Uncontrolled Keywords: Au nanoparticles;Hydroxyapatite;Green synthesis; Antibacterial;Antioxidant
Subjects: Q Science > QD Chemistry
T Technology > T Technology (General)
Divisions: Nanotechnology & Catalysis Research Centre
Depositing User: Ms Zaharah Ramly
Date Deposited: 20 Jun 2022 03:23
Last Modified: 20 Jun 2022 03:23

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