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. 2022 Aug 31;13(2):378–385. doi: 10.1007/s13346-022-01232-4

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Fig. 1 — Fundamentals of gold nanoparticles. A Schematic representation of localized surface plasmon resonance (i.e., collective oscillation of the conduction band electrons of gold nanoparticles, when interacting with an electromagnetic radiation), and the resulting extinction spectrum. B Gold nanorods (AuNR), gold nanostars (AuNS), and gold nanoshells (Au nanoshell) display distinct optical properties compared to spherical nanoparticles (AuNP). C Different biomedical applications of gold nanoconstructs. ROS stand for reactive oxygen species