Wire-free chemical sensor based on the connection of an inductor to an eis or emis capacitor, and applications thereof


Type: 
PCT
Application number: 
WO2007ES70009
Data Solicitut: 
Tue, 2006-01-17 00:00
Publication number: 
WO2007082977 (A1)
Application Data: 
Thursday, July 26, 2007 - 00:00
Inventor: 
BALDI COLL ANTONIO [ES]; GARCIA CANTON JESUS [ES]; MERLOS DOMINGO ANGEL [ES]; DOMINGUEZ HORNA CARLOS [ES]; JIMENEZ JORQUERA CECILIA [ES]; MORENO CODINACHS LIA [ES]
Applicant: 
Consejo Superior de Investigaciones Científicas (CSIC)
IPC: 
G01N27/413; G01N27/403; H01G9/04; H01G9/145; H01L21/02G01N27/413; G01N27/403; H01G9/04; H01G9/145; H01L21/02G01N27/403; H01G9/04; H01G9/145; H01L21/02
Priority Number: 
ES20060000118
Priority Date: 
Thursday, January 19, 2006 - 00:00
Status: 
Agotada
Abstract: 

The present patent describes a wire-free chemical sensor based on LC resonators formed by inductors connected to EIS (Electrolyte-Insulator-Semiconductor) capacitors - which are pH-sensitive - and EMIS (Electrolyte-Membrane-Insulator-Semiconductor) capacitors - which are sensitive to other chemical species in solution. The electrical connection to the solution (and to the membrane) is achieved by means of two electrodes, one being a reference electrode for obtaining a stable DC potential and the other being of low impedance for obtaining a high resonator quality factor. An external inductor coupled magnetically to the resonator's inductor is used to measure the resonant frequency remotely. The advantages offered by this wire-free chemical sensor are its simplicity, low cost, response speed and the non-toxic nature of the materials (it does not use batteries).