2046145 HA-CDs HA-modified carbon dots 1 2046141 HA-CDs Herein, dual-emission fluorescent carbon dots 1 2046142 HA-CDs hierarchical assemblies of CDs 1 2046143 HA-CDs humic acid- derived CDs 1 2046144 HA-CDs hyaluronic acid functionalized carbon dots 1