Economically reproducible surface-enhanced Raman spectroscopy of different compounds in thin film

Authors

  • Ahatashamul Islam Department of Physics, University of Dhaka, Dhaka, Bangladesh
  • Fariha Tasneem Department of Physics, University of Dhaka, Dhaka, Bangladesh
  • Zulfiqar Hasan Khan Department of Physics, University of Dhaka, Dhaka, Bangladesh
  • Asif Rakib Department of Physics, University of Dhaka, Dhaka, Bangladesh
  • Syed Farid Uddin Farhad Industrial Physics Division, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka 1205,Bangladesh
  • Aminul I Talukder Department of Physics, University of Dhaka, Dhaka, Bangladesh
  • AFM Yusuf Haider Department of Mathematics and Natural Sciences, BRAC University, Dhaka 1212, Bangladesh
  • - Md Wahadoszamen Department of Physics, University of Dhaka, Dhaka, Bangladesh

DOI:

https://doi.org/10.3329/jbas.v45i1.54255

Keywords:

Raman spectroscopy, Surface-enhanced Raman spec-troscopy, Thin film SERS substrates, Super-active hotspots

Abstract

We report herein an economically cheap and functionally stable surfaceenhanced Raman scattering (SERS) protocol of two photoactive pigments Rhodamine 6G (R6G) and Kiton Red (KR), implemented in thin films of silver (Ag) and gold (Au) nanoparticles (AgNPs and AuNPs). Both commercially available and chemically synthesized nanoparticles were used. The suitability of the nanoparticles toward SERS activity was tested through UV-visible absorption spectroscopy and scanning electron microscopy (SEM). The AgNPs and AuNPs based SERS substrates in the form of films were fabricated onto square-sized aluminum(Al) plates by simple drop deposition of colloidal nanoparticles solution onto their polished surfaces. The prepared nanoparticle films were sufficiently dried and coated further with the probe (R6G and KR) molecules by employing the identical deposition technique. The enhanced Raman signals of R6G and KR in such composite film structures were then recorded through a custom-built dispersive Raman spectrometer with He-Ne laser excitation at 632.8 nm. Our AgNPsfilm-based SERS protocol could yield the magnitude of the Raman signal enhancement up to 104 times for both R6G and KR. Moreover, AuNPs-based film was found to be less efficient toward the Raman enhancement of both compounds. Our SERS substrates can be easily fabricated, and SERS spectra are reproducible and stable, allowing one to consistently get a reproducible result even after 6 months.

J. Bangladesh Acad. Sci. 45(1); 1-11: June 2021

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Published

2021-07-15

How to Cite

Islam, A., Tasneem, F., Khan, Z. H., Rakib, A., Farhad, S. F. U., Talukder, A. I., Haider, A. Y., & Md Wahadoszamen, .-. (2021). Economically reproducible surface-enhanced Raman spectroscopy of different compounds in thin film. Journal of Bangladesh Academy of Sciences, 45(1), 1–11. https://doi.org/10.3329/jbas.v45i1.54255

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Section

Research Articles