10.1021/acsami.8b10076.s001
Rusul M. Al-Shammari
Rusul M.
Al-Shammari
Mohammad Amin Baghban
Mohammad Amin
Baghban
Nebras Al-attar
Nebras
Al-attar
Aoife Gowen
Aoife
Gowen
Katia Gallo
Katia
Gallo
James H. Rice
James H.
Rice
Brian J. Rodriguez
Brian J.
Rodriguez
Photoinduced
Enhanced Raman from Lithium Niobate on Insulator Template
American Chemical Society
2018
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
2018-08-14 00:00:00
Journal contribution
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.