Fig. 5

(a) FESEM micrograph of NF–1. (b) FESEM micrograph of NF–2. (c) FESEM micrograph of NF–3. (d) FESEM micrograph of NF–4. (e) FESEM micrograph of NF–5
(a) FESEM micrograph of NF–1. (b) FESEM micrograph of NF–2. (c) FESEM micrograph of NF–3. (d) FESEM micrograph of NF–4. (e) FESEM micrograph of NF–5