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(a) Chemical structure of the building blocks and cartoon representation of UCNP@Azo and DCNP@β-CD. (b) Assembly and disassembly between UCNP@Azo and DCNP@β-CD controlled by host-guest recognition. (c) In vivo assembly of UCNP@Azo and DCNP@β-CD with improved tumor targeting and NIR-triggered disassembly with rapid clearance in liver. Reproduced with permission from 85, copyright 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
