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Magnetism-Based Remote Query Glucose Sensors
Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, 208 Materials Research Lab, University Park, PA 16802, USA
* Author to whom correspondence should be addressed.
Received: 18 September 2001; Accepted: 28 September 2001 / Published: 7 October 2001
Abstract: Two wireless, passive remote query magnetism-based glucose sensors, which operate in combination with a mass and volume changing glucose responsive polymer, are presented. One sensor design is based upon the magnetostatic coupling of magnetically soft thin-film elements; as the polymer volume changes in response to glucose concentration so does the magnetostatic coupling between elements. In response to a time varying magnetic field, upon reversal of the magnetization vector of the elements the magnetostatic coupling determines the time rate of change of magnetic flux, and hence the amplitude of the voltage spike generated in a pick-up coil. The other sensor consists of a free-standing magnetoelastic thick-film, coated with a thin layer of the glucose responsive polymer. In response to a time varying magnetic field the sensor mechanically vibrates at a characteristic resonant frequency; the characteristic resonant frequency of the sensor linearly tracks the change in mass of the glucose responsive polymer.
Keywords: Glucose sensor; Fagnetostatic coupling; Fagnetoelastic; Fagnetostrictive; remote query
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Ong, K.G.; Paulose, M.; Jain, M.K.; Gong, D.; Varghese, O.K.; Mungle, C.; Grimes, C.A. Magnetism-Based Remote Query Glucose Sensors. Sensors 2001, 1, 138-147.
Ong KG, Paulose M, Jain MK, Gong D, Varghese OK, Mungle C, Grimes CA. Magnetism-Based Remote Query Glucose Sensors. Sensors. 2001; 1(5):138-147.
Ong, K. G.; Paulose, M.; Jain, M. K.; Gong, D.; Varghese, O. K.; Mungle, C.; Grimes, C. A. 2001. "Magnetism-Based Remote Query Glucose Sensors." Sensors 1, no. 5: 138-147.