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Fourier transform infrared (FTIR) spectra of: (a) Hexadecyltrimethylammonium bromide (CTAB); (b) Tetraethyl orthosilicate (TEOS); (c) Poly(3-hydroxybutyrate) (PHB) fibers; (d) PHB film; (e) PHB/palladium nanoparticles (PdNP) fibers; (f) PHB/PdNP film; (g) PHB/PdNP/CTAB fibers; (h) PHB/PdNP/CTAB film; (i) PHB/PdNP/TEOS fibers; (j) PHB/PdNP/TEOS film. Arrows indicate the chemical bonds and/or groups discussed in the text.
