Investigating the Antibacterial Activities of Graphene Oxide Loaded Spiky Gold Nanocomposites via Chitosan linker

Authors

  • Tam Minh Le Ho Chi Minh City University of Technology and Education, Vietnam
  • Nhung Thi Tran Ho Chi Minh City University of Technology and Education, Vietnam https://orcid.org/0000-0003-0352-9463

Corressponding author's email:

nhungtt@hcmute.edu.vn

DOI:

https://doi.org/10.54644/jte.80.2023.1484

Keywords:

Spiky Gold nanoparticles, Graphene oxide, Nanocomposites, Antibacterial, Plasmon-induced thermal

Abstract

The graphene oxide (GO) loaded spiky gold (AuNS) nanocomposites were prepared by electrostatic interaction between negatively-charged GO nanosheets and positively-charged AuNS by the assistance of chitosan as linker molecules. The AuNS/GO nanocomposites exhibit a red-shift in the extinction spectra and a reduction in the zeta potential compared to those of the pristine AuNS due to the presence of oxygen-containing functional groups in GO. The bactericidal analysis demonstrates that the incorporation of GO greatly enhances the intrinsic antibacterial activities of AuNS. Besides, the AuNS with smaller size exhibit better bactericidal efficiency compared to that of AuNS with bigger size. Upon light irradiation, the AuNS/GO with the absorption peak close to the wavelength of excitation light (900 vs. 904 nm) demonstrates a noticeable improvement in the bactericidal efficiency which is attributed to the plasmon-induced photothermal effect. All these results suggest that the AuNS/GO nanocomposites can work as a promising functional material for both intrinsic and plasmon-induced antibacterial materials.

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Author Biographies

Tam Minh Le, Ho Chi Minh City University of Technology and Education, Vietnam

Le Minh Tam has received B.E. and M.E. degrees in chemical engineering from Ho Chi Minh city University of Technology and a PhD at Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, Germany. Postdoctoral research at Vietnam Academy of Science and Technology. Editorial Board Member of JCERU journal. Expertise in the fields of advanced materials, enantiomer separation, crystallization, chromatography, process analytical technology (PAT), chemical and bio-process engineering. Email: tamlm@hcmute.edu.vn; ORCID:  https://orcid.org/0000-0002-5372-346X

Nhung Thi Tran, Ho Chi Minh City University of Technology and Education, Vietnam

Tran Thi Nhung has received a B.E. degree in chemical engineering from Ho Chi Minh city University of Technology, Vietnam, in 2010; a M.E. degree in chemical engineering in Gachon University, Korea, in 2012; and a Ph.D degree in materials science and engineering in Nanyang Technological University, Singapore, in 2017. She is currently a lecturer at Ho Chi Minh city University of Technology and Education, Vietnam.

Her research focuses on the controlled synthesis of various nanomaterials for catalysis, sensing and antibacterial applications. Email: nhungtt@hcmute.edu.vn; ORCID:  https://orcid.org/0000-0003-0352-9463

References

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Published

28-12-2023

How to Cite

Le, T. M., & Tran, N. T. (2023). Investigating the Antibacterial Activities of Graphene Oxide Loaded Spiky Gold Nanocomposites via Chitosan linker. Journal of Technical Education Science, 18(6), 55–61. https://doi.org/10.54644/jte.80.2023.1484

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