Comparative Materials-Level Evaluation of 3′- and 5′-Thiol DNA Aptamer Conjugation on Gold Nanospheres and Nanoflowers: Apparent DNA Loading Output, Morphology Retention, and Qualitative Salt-Challenge Response. - Sun, Jingchun; Zhang, Linbing; Gonçalves, David; Kuang, Shaoping; Yang, Hongsheng (Sensors (14248220), 2026)