Ultralow Noise Orthogonal Fluxgates Enabling Weak Magnetic Field and Biomolecular Detection (IMAGE)
Caption
- A low-noise orthogonal fluxgate was developed using a CoP/Ag composite core with an amorphous-nanocrystalline dual-phase structure.
- The amorphous–nanocrystalline core is associated with reduced magnetic loss and improved domain regularity and, together with closed-loop feedback, enables a noise floor of 8 pT/√Hz at 1 Hz.
- The sensor enables Alpha-fetoprotein (AFP) immunomagnetic detection with a linear range of 50 fg mL−1–100 ng mL−1 and a detection limit of 50 fg mL−1, demonstrating competitive sensitivity for AFP immunomagnetic detection.
Credit
Xiaofeng Pu, Zhijun Sheng, Zhoulu Yu, Huaidong Li, Xintao Wei, Tao Yang, Qingfang Liu, Guozhi Chai, Xiaolei Liang, Daqiang Gao*.
Usage Restrictions
Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted.
License
CC BY-NC-ND