Western Michigan University

Sai Guruva Reddy Avuthu

Massood Zandi Atashbar

Binu Baby Narakathu

Margaret Joyce

Ali Eshkeiti

Michael James Joyce

An inductive-capacitive (LC) wireless sensor for the detection of toxic heavy metal ions includes inductors and interdigitated electrodes (IDE) in planar form. The sensor is fabricated by screen printing silver (Ag) ink onto a flexible polyethylene-terephthalate (PET) substrate to form a metallization layer. Palladium nanoparticles (Pd NP) is drop casted onto the IDEs to form a sensing layer. The resonant frequency of the LC sensor is remotely monitored by measuring the reflection coefficient (S) of a detection coil (planar inductor). The resonant frequency of the LC sensor changes with varying concentrations of heavy metals such as mercury (Hg) and lead (Pb) ions. Changes in the resonant frequency are used to detect the presence and/or concentration of heavy metal ions.

Printed wireless inductive-capacitive (LC) sensor for heavy metal detection

An impact sensing system includes a first impact sensor having a flexible dielectric layer, a first printed electrode on a first side of the layer, and a second printed electrode on a second side of the layer. The second printed electrode overlies and is moveable toward and away from the first electrode by deformation of the flexible dielectric layer. Further, the layer maintains a capacitance between to the first electrode and the second electrode that changes with a movement of the second electrode toward or away from the first electrode. The system further includes a first readout circuit electronically coupled with the first and second electrodes to measure a change in the capacitance and output a corresponding voltage.

Growing community of inventors

Mt. Pleasant, MI, United States of America

Sai Guruva Reddy Avuthu