“…[1][2][3][4][5][6][7] Over the past decade or so, there has been increasing interest in the synthesis of concave polymer particles, [8][9][10] which mainly include dimple/ dimpled particles that typically have one dent on each particle surface (also named bowl-like particles, buckled particles, cavity particles, mushroom cap-shaped particles, red blood cell-like particles, etc. ), [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] as well as more complex golf balllike particles [24][25][26] and surface-wrinkled particles. 27,28 Perhaps, the most prominent characteristic of such concave polymer particles is their larger specific surface areas than their spherical counterparts.…”