“…Gold nanoparticles (AuNPs) have various biological applications 2–4 owing to their unique surface chemical, 5 electrical, 6 and optical properties. 7 Contrast agents based on gold nanoparticles 8 have been developed for various applications, including computed tomography (CT), 9 magnetic resonance imaging (MRI), 10 single-photon emission computed tomography (SPECT), 11 fluorescence imaging, 12 and others, with the aim of amplifying the sensitivity and precision of these imaging modalities.…”