Golf ball-shaped PLGA microparticles with internal pores fabricated by simple O/W emulsion

Simple oil-in-water emulsion led to structural complexity at both the surface and interior of the PLGA microsphere. A golf ball-like dimpled surface comes from the heteroaggregation of volatile nonsolvent colloid originating from the inside of the organic droplet as supported by in situ optical microscopy. The internal porous structure and encapsulation of hydrophobic agent inside the microparticle implies its potential application as a drug carrier.