merged

Synthesis And Characterization Of Polystyrene@Alloy(Silver-Gold) Core-
Shell Nanoparticle As Potential Substrate For Surface-Enhanced Raman
Scattering (Sers)
Siti Aisyah Binti Mohamed Diah
Supervisor: Dr. Syara Binti Kassim
Bachelor of Science (Chemical Sciences)
School of Fundamental Science
Core-shell structure is applicable in various fields especially in material science by
using SERS technique since it exhibit unique properties. Core-shell structure is made
up of polystyrene and alloy (silver and gold) nanoparticles which known as
metallodielectric photonic crystal (MDPCs). Polystyrene act as host of MDPCs; and
further incorporated with alloy known as PS@alloy. Polystyrene as a dielectric material
exhibit a complete reflection throughout the crystal layer which known as complete
photonic band gap. A combination of silver and gold results in an intense plasmon
resonance peak around 450nm. The objectives of the research are to synthesize
polystyrene, alloy, and polystyrene incorporated with alloy nanoparticles. Those
products were characterized using spectroscopy techniques to study the optical
scattering and absorption properties. The instruments involved in this study are FT-
IR, UV-vis spectroscopy, TGA, XRD, SEM, and EDS. The resulting analysis reveals the
potentialities of PS@alloy to enhance Raman signal as a SERS substrate.
456 | U M T U N D E R G R A D U A T E R E S E A R C H D A Y 2018