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. 2021 Jan 8;11(1):138. doi: 10.3390/nano11010138

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© 2021 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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Figure A7 — AuNP-PEG 1 (A_spr = 0.730/A₄₅₀ = 0.633 give 1.15 → 3–4 nm) after dialysis with typical absorption maximum for ultrasmall AuNPs at 514 nm (left). AuNP-maleimide 2a (right).