[ACS Nano, 2022] Heterogeneous Component Au (Outer)–Pt (Middle)–Au (Inner) Nanorings: Synthesis and Vibrational Characterization on Middle Pt Nanorings with Surface-Enhanced Raman Scattering (Soohyun Lee, Insub Jung, Jiwoong Son, Sungwoo Lee, Minsun Park, Ji-Eun Kim, Woocheol Park, Jaewon Lee, Jwa-Min Nam, and Sungho Park)