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. 2020 Dec 11;12(12):3727. doi: 10.3390/cancers12123727

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Schematics of ZnCuInSe/ZnS quantum dot (QD) structure: (a) Control QDs (QD-SPP) and (b) targeted QD-A20. (c,d) Schematics of the QD-A20 surface chemistry. Control QDs (QD-SPP) were coated with pure (c) p(SPP-b-VIM) block polymers, while (d) the p((SPP-co-APMA)-b-VIM) polymeric ligand was reacted with DBCO-NHS and with the α_vβ₆-targeting peptide N₃-A20 in QD-A20. The indicated degree of polymerization: sulfobetaine (SPP, blue, solubilization and antifouling, n ≈ 35), DBCO (green, functionalization, m ≈ 5) and imidazole (orange, anchoring, l ≈ 10).