“…In recent years, carbon materials have attracted considerable attention because of their novel morphologies and specially physical and chemical properties, such as fullerenes, 6 hollow and solid spheres, [7][8][9][10][11][12][13] nanotubes, [14][15][16][17][18] onions, [19][20][21] nanorods and nanocoils. 22 Among these, carbon spheres are becoming increasingly important due to their promising applications in the fields of medicine, pharmaceutics, material science and paint industry.…”