Surface enhanced Raman scattering of rhodamine B using silver nanowires

  • Jeremias Ibus Armonia National Institute of Physics, University of the Philippines Diliman
  • Horace Andrew F Husay National Institute of Physics, University of the Philippines Diliman
  • Debinya B Buenafe National Institute of Physics, University of the Philippines Diliman
  • Laureen Ida M Ballesteros Condensed Matter Physics Laboratory, National Institute of Physics, College of Science, University of the Philippines, Diliman, Quezon City
  • Ferdinand T Cayabyab National Institute of Physics, University of the Philippines Diliman
  • Adonis Villagomez National Institute of Physics, University of the Philippines Diliman
  • Mary Donnabelle L Balela Department of Mining, Metallurgical and Materials Engineering, University of the Philippines Diliman
  • Nathaniel de Guzman Department of Mining, Metallurgical and Materials Engineering, University of the Philippines Diliman
  • Armando S Somintac National Institute of Physics, University of the Philippines Diliman

Abstract

Silver nanowires (Ag NWs) were used as Surface-Enhanced Raman Spectroscopy (SERS) substrates to detect trace amounts of Rhodamine B (RhB) dye. Silver NWs formed by electroless deposition in ethylene glycol with the aid of polyvinyl pyrollidone (PVP) as capping agent were prepared in ethanol solution. Scanning electron microscopy (SEM) revealed that the Ag NWs have an average diameter and length of 103.7 nm and 41.1µm , respectively. The Ag NWs were used to enhance the Raman signature of RhB. Varying concentrations of RhB (1, 6, 10, 20 µM) were prepared. Ultraviolet-visible (UV-Vis) spectrophotometry showed that the dye has a peak absorbance at 553 nm. The absorbance measurements were used to calibrate the dye concentrations using the Beer-Lambert formula. Raman analysis showed that the Ag NWs enhance the intensity of the characteristic vibrational modes of RhB up to a factor of 6. The results show that RhB can be detected using Ag NW SERS substrates up to 1 µM. This work also demonstrates that Raman spectroscopy has great potential in analyzing chemical processes such as photodegradation aside from material identification. 

Published
2018-05-28
How to Cite
[1]
J. Armonia, H. A. Husay, D. Buenafe, L. I. Ballesteros, F. Cayabyab, A. Villagomez, M. D. Balela, N. de Guzman, and A. Somintac. Surface enhanced Raman scattering of rhodamine B using silver nanowires, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-PA-31 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-PA-31.
Section
Poster Session A (Materials Science, Instrumentation, and Photonics)