Surface-Enhanced Raman Scattering-Active Substrate Prepared with New Plasmon-Activated Water Chih-Ping Yang Sheng-Uei Fang Kuang-Hsuan Yang Hsiao-Chien Chen Hui-Yen Tsai Fu-Der Mai Yu-Chuan Liu 10.1021/acsomega.8b00494.s001 https://acs.figshare.com/articles/journal_contribution/Surface-Enhanced_Raman_Scattering-Active_Substrate_Prepared_with_New_Plasmon-Activated_Water/6205136 Conventionally, reactions in aqueous solutions are prepared using deionized (DI) water, the properties of which are related to inert “bulk water” comprising a tetrahedral hydrogen-bonded network. In this work, we demonstrate the distinguished benefits of using in situ plasmon-activated water (PAW) with reduced hydrogen bonds instead of DI water in electrochemical reactions, which generally are governed by diffusion and kinetic controls. Compared with DI water-based systems, the diffusion coefficient and the electron-transfer rate constant of K<sub>3</sub>Fe­(CN)<sub>6</sub> in PAW in situ can be increased by ca. 35 and 15%, respectively. These advantages are responsible for the improved performance of surface-enhanced Raman scattering (SERS). On the basis of PAW in situ, the SERS enhancement of twofold higher intensity of rhodamine 6G and the corresponding low relative standard deviation of 5%, which is comparable to and even better than those based on complicated processes shown in the literature, are encouraging. 2018-05-01 12:50:02 DI water-based systems surface-enhanced Raman plasmon-activated water electron-transfer rate DI water tetrahedral hydrogen-bonded network PAW New Plasmon-Activated Water Conventionally diffusion coefficient hydrogen bonds SERS enhancement rhodamine 6 G Surface-Enhanced Raman Scattering-Active Substrate electrochemical reactions