Contents: (Small 47/2016)

NanofibersThe synthesis of a chiral fluorescent silole derivative containing l-leucine methyl ester moiety (Silole-Leu) is reported by B. S. Li, B. Z. Tang, co-workers on page 6593.Silole-Leu exhibits aggregation-induced emission and circular dichroism, and circular polarized luminescence.Silole-Leu is endowed with the ability to self-assemble into nano/micro helical luminescent fibers and their dimensions can be tuned by adjusting the ratio and volume of the mixed solvents for assembling. Cell TrackingLong-term tracking of bone marrow stromal cells in a rat photothrombotic ischemia model is achieved by organic nanoparticles with aggregation-induced emission.On page 6576, L.-D.Liao, B. Liu, and co-workers demonstrate the design and synthesis of the nanoparticles to realize low phototoxicity and high stability.These nanoparticles show promising potential for monitoring the transplanted stem cells in cell therapy. Aggregation-Induced EmissionRecent advances in aggregation-induced emission (AIE)-based probes for biomedical imaging are summarized by X.-J.Liang and co-workers on page 6451.AIE probes have recently been considered as alternatives in the area of biological imaging, e.g.lighting up subcellular organelles, tracking cellular processes, monitoring living tissues, improving the diagnosis of disease, and evaluating therapies, to reveal the mysteries of life.