We have successfully demonstrated a versatile strategy for cooperative self-assembly of globular poly(llysine) dendrimers with linear poly(l-leucine). After a twostep hierarchical self-assembly, the nanoparticles possessed a capsid-like biomimetic nanoarchitecture. The hierarchical peptidesomes exhibited high gene-transfection efficiency as nonviral gene vectors. The strategy of the hierarchical selfassembly could also be applied for fabricating versatile nanoarchitectures. A detailed study of the cooperative selfassembly,
such as precise regulation of the morphology and medical applications, is being explored and will be reported in our future publications.