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Peer-reviewedCC BY 4.0ACS Omega

Surface-Enhanced Raman Spectroscopic Characterization of Chitosan Extracted from Black Soldier Fly Pupa Shells

  • Nora Slekiene1,2
  • Zineb Chiki3
  • Ingrida Bruzaite4
  • Juozas Padgurskas5
  • Valentinas Snitka6
6 affiliations
  1. 1Vilnius University , , M.K. Čiurlionio str. 21/27 , ,
  2. 2Vilnius University , , Žaliųjų Ežerų str. 2 , ,
  3. 3Sidi Mohamed Ben Abdellah University , , Route Imouzzer, BP 2202 , ,
  4. 4Vilnius Gediminas Technical University , , Sauletekio Av. 11 , ,
  5. 5Vytautas Magnus University (VMU) , , Studentų str. 15 , Akademija, ,
  6. 6Kaunas University of Technology , , Studentu str. 65 , ,
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Abstract

Chitosan is widely used as a matrix in metal nanoparticle-based surface-enhanced Raman scattering (SERS) substrates; however, its intrinsic spectral features may interfere with analyte identification. Conventional Raman spectroscopy of chitosan is further limited by strong fluorescence, resulting in scarce, reliable spectral data. In this study, chitosan extracted from Black Soldier Fly (BSF) (Hermetia illucens) pupa shells was characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and silver nanoparticle-enhanced SERS. SERS measurements enabled the acquisition of well-resolved vibrational spectra of chitosan despite the strong fluorescence observed in conventional Raman measurements. Comparison with commercial chitosan and literature data allowed identification of characteristic spectral features associated with the chitosan molecular structure. The synthesized chitosan exhibited distinct structural and spectroscopic characteristics compared with the commercial material, including differences in relative crystallinity and characteristic FTIR and SERS spectral features. The results demonstrate that SERS is a suitable complementary spectroscopic approach for the characterization of chitosan and provides spectral information for the interpretation of chitosan-associated signals in SERS measurements.

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Cite

BibTeXRIS
BibTeX
@article{slekiene2026surfaceenhanced,
  title = {{Surface-Enhanced Raman Spectroscopic Characterization of Chitosan Extracted from Black Soldier Fly Pupa Shells}},
  author = {Nora Slekiene and Zineb Chiki and Ingrida Bruzaite and Juozas Padgurskas and Valentinas Snitka},
  journal = {ACS Omega},
  year = {2026},
  month = oct,
  doi = {10.1021/acsomega.6c08530},
  url = {https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c08530/5458553/Surface-Enhanced-Raman-Spectroscopic},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Surface-Enhanced Raman Spectroscopic Characterization of Chitosan Extracted from Black Soldier Fly Pupa Shells
AU  - Nora Slekiene
AU  - Zineb Chiki
AU  - Ingrida Bruzaite
AU  - Juozas Padgurskas
AU  - Valentinas Snitka
PY  - 2026
DA  - 2026/10/26
JO  - ACS Omega
DO  - 10.1021/acsomega.6c08530
UR  - https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c08530/5458553/Surface-Enhanced-Raman-Spectroscopic
AB  - Chitosan is widely used as a matrix in metal nanoparticle-based surface-enhanced Raman scattering (SERS) substrates; however, its intrinsic spectral features may interfere with analyte identification. Conventional Raman spectroscopy of chitosan is further limited by strong fluorescence, resulting in scarce, reliable spectral data. In this study, chitosan extracted from Black Soldier Fly (BSF) (Hermetia illucens) pupa shells was characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and silver nanoparticle-enhanced SERS. SERS measurements enabled the acquisition of well-resolved vibrational spectra of chitosan despite the strong fluorescence observed in conventional Raman measurements. Comparison with commercial chitosan and literature data allowed identification of characteristic spectral features associated with the chitosan molecular structure. The synthesized chitosan exhibited distinct structural and spectroscopic characteristics compared with the commercial material, including differences in relative crystallinity and characteristic FTIR and SERS spectral features. The results demonstrate that SERS is a suitable complementary spectroscopic approach for the characterization of chitosan and provides spectral information for the interpretation of chitosan-associated signals in SERS measurements.
SN  - 2470-1343
ER  -