A pulse system for spectrum analysis of magnetoelastic biosensors

Wen Shen; Mathison, Leslie C.; Petrenko, Valery A.; Chin, Bryan A.
April 2010
Applied Physics Letters;4/19/2010, Vol. 96 Issue 16, p163502
Academic Journal
In this paper, a pulse system is reported whereby it is possible to detect concentrations of bacteria using small magnetoelastic biosensors. The system also allows detection using multiple sensors, where a control sensor can be used to compensate for environmental variables. This system removes the bias magnetic field and thus eliminates an error source. An equation is derived to describe the mechanical vibration of a sensor in a pulse system. Both frequency domain and time domain signals were studied to determine the optimum pulse power. The system was verified with a control sensor and a detection sensor to detect bacteria.


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