Geometric Optimization of GMR Biosensors with Trapezoidal Magnetic Flux Concentrators for Detecting Bacillus anthracis in Complex Matrices. - Zhao, Changhui; Li, Jiao; Sun, Hao; Ren, Chunming; Li, Shenghao; Lei, Chong; Yang, Zhen; Sun, Xuecheng (Sensors (14248220), 2026)