Highly uniform plasmonic microstructures for surface-enhanced Raman scattering applications
Issued Date
2025-01-01
Resource Type
ISSN
17426588
eISSN
17426596
Scopus ID
2-s2.0-85217572169
Journal Title
Journal of Physics: Conference Series
Volume
2934
Issue
1
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Physics: Conference Series Vol.2934 No.1 (2025)
Suggested Citation
Patpong S., Daengngam C., Phengdaam A., Osotchan T., Dawes J.M., Sitpathom N. Highly uniform plasmonic microstructures for surface-enhanced Raman scattering applications. Journal of Physics: Conference Series Vol.2934 No.1 (2025). doi:10.1088/1742-6596/2934/1/012029 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/105338
Title
Highly uniform plasmonic microstructures for surface-enhanced Raman scattering applications
Corresponding Author(s)
Other Contributor(s)
Abstract
Plasmonic microstructures have potential applications for surface-enhanced Raman scattering. Consistent microstructure features are crucial to ensure spatial reliability and accuracy of measurements. In this work, we assessed the performance of surface-enhanced Raman scattering using plasmonic self-assembled microstructures. The plasmonic microstructures were prepared from polystyrene beads with 500-nm and 1000-nm diameters via convective deposition and capped by sputtering a thin gold film. Raman scattering spectra of the probe molecule methylene blue were measured at a 785 nm excitation wavelength. Enhancement factors of 7.8×105 and 3.9×106 were obtained for 500-nm and 1000-nm plasmonic microstructures, respectively. The higher enhancement factor for the 1000-nm microstructure case is attributed to strong electric field near the semi-shell surface and near-field localization above the structure. The uniformity of the surface-enhanced Raman scattering substrates was evaluated by comparing the Raman shift intensities at 1610 cm-1 at 20 distinct locations on each substrate. The relative standard deviations (RSD) were found to be 0.032% and 0.018% for 500-nm and 1000-nm templates, respectively. These plasmonic microstructures can be useful for surface-enhanced Raman scattering applications.