Figure 4
From: Polyoxometalate-based microcrystal arrays patterned on air-grid superwettable surface
Two typical POM crystal arrays patterned on air-grid superwettable surfaces including (a,b) Wells-Dawson-typed K6P2W18O64 (denoted as P2W18) and (c,d) Keggin-typed Na3PW12O40 (denoted as PW12). Insert images in (b,d) show the corresponding crystal structures of P2W18 and PW12.
