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. Author manuscript; available in PMC: 2015 Jan 1.
Published in final edited form as: APL Mater. 2015 Jan;3(1):014902. doi: 10.1063/1.4900887

Figure 4. Investigation of residual PEG (a) and significant water content using Raman spectroscopy ((b) and (c)).

Figure 4

None of the fibres demonstrated the characteristic PEG peak at a wavenumber of around 2900 cm−1 [31]. There were also not significant peaks present attributable to the δ or ν modes of water absorption at 1640 or 3280 cm−1 [32].