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A) Self-assembly scheme and TEM images of P1 peptide under different pH values. Reproduced with permission from reference 45. Copyright 2012 American Chemical Society. B) Schematic representation of the fabrication of MEL/Cypate@HA complexes and their successive size/morphology transformations triggered by the mildly acidic tumor microenvironment and NIR laser irradiation. Reproduced with permission from reference 46. Copyright 2019 American Chemical Society.
