Figure 1: SEM images of prepared hybrid fibre mats. (a) O-2G, (b) O-4G and (c) P-2G. Bar: 5 μm. All of the prepared fibre mats consisted of submicron-sized fibres. The average diameters of O-2G, O-4G and P-2G were 186 ± 18, 273 ± 33 and 222 ± 51 nm, respectively.