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Bioactive peptides are a group of compounds with diverse biological functions,among which the peptides with antibacterial or anticancer activities have attracted the most attentions from researchers [1].Compared with small molecules and protein drugs,peptides have unbeatable advantages.However,the application of peptide drugs is always restricted by their poor stability and selectivity.Although there have been quite a few reports about the study of self-assembling peptides [2],the application of formed peptide nanostructures by self-assembling dissociating under specific conditions to realize targeting delivery of peptides was not reported.