Photoinduced Enhanced Raman from Lithium Niobate on Insulator Template Rusul M. Al-Shammari Mohammad Amin Baghban Nebras Al-attar Aoife Gowen Katia Gallo James H. Rice Brian J. Rodriguez 10.1021/acsami.8b10076.s001 https://acs.figshare.com/articles/journal_contribution/Photoinduced_Enhanced_Raman_from_Lithium_Niobate_on_Insulator_Template/7012949 Photoinduced enhanced Raman spectroscopy from a lithium niobate on insulator (LNOI)–silver nanoparticle template is demonstrated both by irradiating the template with 254 nm ultraviolet (UV) light before adding an analyte and before placing the substrate in the Raman system (substrate irradiation) and by irradiating the sample in the Raman system after adding the molecule (sample irradiation). The photoinduced enhancement enables up to an ∼sevenfold increase of the surface-enhanced Raman scattering signal strength of an analyte following substrate irradiation, whereas an ∼threefold enhancement above the surface-enhanced signal is obtained for sample irradiation. The photoinduced enhancement relaxes over the course of ∼10 h for a substrate irradiation duration of 150 min before returning to initial signal levels. The increase in Raman scattering intensity following UV irradiation is attributed to photoinduced charge transfer from the LNOI template to the analyte. New Raman bands are observed following UV irradiation, the appearance of which is suggestive of a photocatalytic reaction and highlight the potential of LNOI as a photoactive surface-enhanced Raman spectroscopy substrate. 2018-08-14 00:00:00 Raman system photoinduced enhancement analyte Photoinduced Enhanced Raman New Raman bands LNOI UV irradiation photoinduced charge transfer template photoactive surface-enhanced Raman spectroscopy substrate substrate irradiation Insulator Template Photoinduced signal sample irradiation substrate irradiation duration