Gold nanorod-decorated metallic mos2 nanosheets for synergistic photothermal and photodynamic antibacterial therapy

Sibidou Yougbaré, Chinmaya Mutalik, Pei Feng Chung, Dyah Ika Krisnawati, Fajar Rinawati, Hengky Irawan, Heny Kristanto, Tsung Rong Kuo

Research output: Contribution to journalArticlepeer-review

Abstract

Light-responsive nanocomposites have become increasingly attractive in the biomedical field for antibacterial applications. Visible-light-activated metallic molybdenum disulfide nanosheets (1T-MoS2 NSs) and plasmonic gold nanorods (AuNRs) with absorption at a wavelength of 808 nm were synthesized. AuNR nanocomposites decorated onto 1T-MoS2 NSs (MoS2@AuNRs) were successfully prepared by electrostatic adsorption for phototherapy applications. Based on the photothermal effect, the solution temperature of the MoS2@AuNR nanocomposites increased from 25 to 66.7C after 808 nm near-infrared (NIR) laser irradiation for 10 min. For the photodynamic effect, the MoS2@AuNR nanocomposites generated reactive oxygen species (ROS) under visible light irradiation. Photothermal therapy and photodynamic therapy of MoS2@AuNRs were confirmed against E. coli by agar plate counts. Most importantly, the combination of photothermal therapy and photodynamic therapy from the MoS2@AuNR nanocomposites revealed higher antibacterial activity than photothermal or photodynamic therapy alone. The light-activated MoS2@AuNR nanocomposites exhibited a remarkable synergistic effect of photothermal therapy and photodynamic therapy, which provides an alternative approach to fight bacterial infections.

Original languageEnglish
Article number3064
JournalNanomaterials
Volume11
Issue number11
DOIs
Publication statusPublished - Nov 2021

Keywords

  • Antimicrobial activity
  • Gold nanorods
  • Metallic molybdenum disulfide
  • Photodynamic therapy
  • Phototherapy
  • Photothermal therapy
  • Synergistic effect

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)

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