Figure 2:
XRD pattern of (a) As-prepared Fe
3
O
4
nanocubes and (b) Fe
3
O
4
/SiO
2
with 1 mL TEOS, (c) Fe
3
O
4
/SiO
2
with 1.5 mL TEOS, (d) Fe
3
O
4
/SiO
2
with 2 mL TEOS and (e) Fe
3
O
4
/SiO
2
with 2.5 mL TEOS.
