“…To date, many efficient synthesis strategies have been developed to synthesize different magnetic NRs (i.e. Ni 80 Fe 20 [7], Co-Sn-O [8], Co-Cu [9], CoFe 2 O 4 [10], Co [5,6,11], Ni-Co [12], Ni 80 Fe 20 /Au/ Co [13], Co/CoO [14], α-Fe 2 O 3 [15], Fe 3 O 4 [16], and γ-Fe 2 O 3 ); these strategies include lithography [5], the template-based meth-hydrothermal route [8], microemulsion [9], and the solvothermal process [10]. However, only a few complicated routes, such as modified colloidal lithography [17], electron beam lithography [18], and zone-platearray lithography and lift-off processing [5], have been developed to synthesize elliptical NRs.…”