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Size control of polydimethylsiloxane (PDMS) microspheres. a,c,e) SEMs of PDMS microspheres obtained with a) 4 mg mL−1, c) 20 mg mL−1, and e) 100 mg mL−1 PDMS in hexanes. b,d,f) Size distributions of microspheres shown in (a,c,e), respectively. Size distributions were determined using the Image J software package, with total number of microspheres counted given as N.
