Figure 1. Schematic illustration of one-step preparation of protein-functionalized QDs.

(a) One-step synthesis of protein-functionalized Zn_xHg_1-xSe QDs using Zn²⁺, Hg²⁺, and HSe⁻ ions as precursors and MPA and protein as co-ligands. The synthesis is conducted at room temperature and completed in one second. (b) Structures, molecular weights, and isoelectric points of BSA, lysozyme, trypsin, hemoglobin, and transferrin. (c) Schematic illustration of BSA-, lysozyme-, trypsin-, hemoglobin-, and transferrin-functionalized QDs.