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Morphology Tuning of Aggregation-Induced Emission Probes by Flash Nanoprecipitation: Shape and Size Effects on in Vivo Imaging.

Mingwei WangYisheng XuYajing LiuKaizhi GuJinchao TanPing ShiDahai YangZhi-Qian GuoWei-Hong ZhuXuhong GuoMartien A Cohen Stuart
Published in: ACS applied materials & interfaces (2018)
Aggregation-induced emission (AIE) imaging probes have recently received considerable attention because of their unique property of high performance in the aggregated state and their imaging capability. However, the tendency of AIE molecules to aggregate into micron long irregular shapes, which significantly limits their application in vivo, is becoming a serious issue that needs to be addressed. Here, we introduce a novel engineering strategy to tune the morphology and size of AIE nanoaggregates, based on flash nanoprecipitation (FNP). Quinolinemalononitrile (ED) is encapsulated inside properly selected amphiphilic block copolymers of varying concentration. This leads to a variety of ED particle morphologies with different sizes. The shape and size are found to have strong influences on tumor targeting both in vitro and in vivo. The current results therefore indicate that the FNP method together with optimal choice of an amphiphilic copolymer is a universal method to systematically control the aggregation state of AIE materials and hence tune the morphology and size of AIE nanoaggregates, which is potentially useful for precise imaging at specific tumor sites.
Keyphrases
  • living cells
  • high resolution
  • fluorescent probe
  • emergency department
  • small molecule
  • single molecule
  • cancer therapy
  • photodynamic therapy
  • drug release