Photoinduced Enhanced Raman from Lithium Niobate on Insulator Template

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Title: Photoinduced Enhanced Raman from Lithium Niobate on Insulator Template
Authors: Al-Shammari, Rusul M.Baghban, Mohammad AminAl-Attar, NebrasGowen, AoifeGallo, KatiaRice, James H.Rodriguez, Brian J.
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Date: 14-Aug-2018
Online since: 2021-01-15T09:31:06Z
Abstract: © 2018 American Chemical Society. 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.
Funding Details: Science Foundation Ireland
Type of material: Journal Article
Publisher: American Chemical Society
Journal: ACS Applied Materials and Interfaces
Volume: 10
Issue: 36
Start page: 30871
End page: 30878
Copyright (published version): 2018 American Chemical Society
Keywords: RamanSERSChemical enhancementFerroelectricPhotoinduced
DOI: 10.1021/acsami.8b10076
Language: en
Status of Item: Peer reviewed
ISSN: 1944-8244
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Appears in Collections:Conway Institute Research Collection
Physics Research Collection
Biosystems and Food Engineering Research Collection

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