Electric field sensing devices and systems and method of making the same

A method of making an electric field sensing device comprising;

• providing a substrate;
• depositing on the substrate by physical or chemical vapor deposition or solution deposition methods a sensing medium capable of experiencing a change in its electrical resistivity in response to an electric field emitted by an object;
• and
• placing two or more electrodes configured to be utilized in measuring the change in electrical resistivity of the sensing medium in response to an electric field;

An electric field sensing system comprising:

• a plurality electric field sensing devices, wherein each of the electric field sensing devices contains a substrate, a sensing medium deposited on the substrate, wherein the sensing medium is capable of experiencing a change in its electrical resistivity in response to an electric field;
• and two or more electrodes configured to be utilized in measuring the change in electrical resistivity of the sensing medium in response to an electric field;
• an arrangement of the plurality of the sensing devices in such a way as to detect spatial variation of electric field emitted by objects in an environment;
• and
• a computer system capable of monitoring the plurality of the sensing devices, and detecting and comparing differences between individual devices.