Amphiphilic block copolymers can form polymer micelles for delivering hydrophobic fluorescent probes with aggregation-induced emission properties, as presented by A. K.-Y. Jen et al. on page 1413. By itself, 1,1,2,3,4,5-hexaphenylsilole (HPS) exhibits dramatically enhanced blue-green fluorescent emission efficiencies when encapsulated within the hydrophobic core of a polymeric micelle. When HPS is co-encapsulated with bis(4-(N-(1-naphthyl) phenylamino)-phenyl)fumaronitrile, effective orange-red fluorescence resonance energy transfer can be demonstrated within live RAW 264.7 cells. Illustration provided by Brent Polishak.