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Resonant Bio-chemical Sensor Capable of Wireless Interrogation

Resonant Bio-chemical Sensor Capable of Wireless Interrogation (UD482)

  • Higher sensitivity
  • Higher selectivity
  • Ease of wireless interrogation
  • Detention of specific trance environment analytes in solid or gaseous form, such as odors, ammonia, TNT, etc.

A resonant sensor can vary its output in accordance with changes in specific environment conditions near the sensor. Typically, resonant sensors are comprised of an inductance-capacitance (LC) circuit with a specific resonance frequency.

Biopolymers, such as Deoxyribonucleic acid (DNA)-cetyltrimethylammonium (CTMA) and bovine serum albumin (BSA), have been found to have unique dielectrical properties. These biodielectrics can exhibit voltage tunable dielectric properties at room temperatures at microwave frequencies. Dielectric tunability of more than 50% has been measured in DNA-CTMA biopolymer and about 40% in BSA-polyvinyl alcohol (PVA) polymer. Therefore, the voltage dependent dielectric tunability of these polymers can offer a unique opportunity to use the polymers in resonant sensor applications.

The described invention is a resonant sensor applicable for sensing bio-chemicals or trace chemicals in   solid or gaseous form. It uses functionalized biopolymers as a sensing layer, whose dielectric properties or electrical conductance changes in the presence of an analyte. These changes can be sensed wirelessly.

ip status:

US patent  

EPO - European Patent Office  


Dr. Guru Subramanyam

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