Cancer imaging 1 Gold 1 Gold nanostar synthesis 1 Near-infrared dye 1 Raman spectrometry 1 Review 1 Spectrum Analysis, Raman 1 Surface-enhanced Raman scattering aptamer 1 autofluorescence 1 biocompatibility 1 biodegradability 1 biodegradation 1 breast cancer 1 carcinogenesis 1 contrast medium 1 crystallization 1 dispersity 1 drug release 1 drug synthesis 1 encapsulation 1 exosome 1 fluorescence imaging 1 folic acid 1 gallic acid 1 gold 1 gold nanoparticle 1 gold nanorod 1 graphene oxide 1 human 1