Page 20 - IPCoSME 2021

1 INTERNATIONAL POSTGRADUATE CONFERENCE ON SCIENCE AND MARINE ENVIRONMENT 2021
st
(IPCoSME 2021)
“Environmental Sustainability Enhancement Through the Collaboration of Sciences”

RA-07

SURFACE ENHANCED RAMAN SPECTROSCOPY BASED ON METAL NANO
ALLOY EMBEDDED PHOTONICS CRYSTAL FOR LEPTOSPIRA DNA

DETECTION

2
ANIS ATHIRAH ABDUL RAZAK , AIMA RAMLI* , AND SYARA KASSIM 2
1

1 Faculty of Science and Marine Environment, Universiti Malaysia Terengganu (UMT), 21030
Kuala Nerus, Kuala Terengganu, Malaysia
2 Advanced Nano Materials Research Group (ANoMa), Faculty of Science and Marine
Environment, Universiti Malaysia Terengganu (UMT), 21300 Kuala Nerus, Kuala Terengganu,
Malaysia

*Corresponding author email: aima.ramli@umt.edu.my

Abstract: Surface enhanced Raman spectroscopy (SERS) is a powerful vibrational

spectroscopy technique that allows a highly sensitive structural detection at low concentration

of analytes. SERS signal can be obtained through the amplification of electromagnetic fields
generated by the excitation of localized surface plasmon resonances in metallic nanostructures.

In this work, we are interested to excite the SERS signal from 3D metallo-dielectric poly methyl

methacrylate (PMMA) thin films embedded with gold-silver nanoalloys. The PMMA thin film
will act as a photonic crystal and it possesses a band gap property which allows certain

frequencies of light to propagate inside the structure but trapped the remaining photons in the
crystal lattice. We anticipate that by properly designing the PMMA photonic crystal thin film

to have a bandgap which falls into the plasmonic modes of the gold silver nanoalloys, we are
able to enhance the excitation of SERS signal from the fabricated substrates. These substrates

will have a potential to be used as an ultra-sensitive SERS-based biosensing platform. Any

changes that occur around the metallic nanostructures proximity will cause significant peak
occurrences in the Raman vibration spectra to serve as a promising probe for enhanced disease

diagnosis tool.

Keywords: SERS, metallic nanostructures, poly methyl methacrylate, photonic crystal,

biosensor.

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