Figure 2
2D-COR FTIR contour maps of the SPE-10 in the wavenumber range of 3250–3500 cm−1 without EF (a,b) and with the external voltage of 4 V (c–h), (a,c,e,g) synchronous spectra and (b,d,f,h) asynchronous spectra.
Figure 2 | Scientific Reports
2D-COR FTIR contour maps of the SPE-10 in the wavenumber range of 3250–3500 cm−1 without EF (a,b) and with the external voltage of 4 V (c–h), (a,c,e,g) synchronous spectra and (b,d,f,h) asynchronous spectra.
