Highly selective chemical and biological sensors

A sensor, comprising:

• a resonant inductor-capacitor-resistor (LCR) circuit;
• and
• a sensing material disposed over at least a portion of the LCR circuit, wherein the sensing material is configured to allow selective detection of at least six different analyte fluids from an analyzed fluid mixture, wherein the sensing material comprises composite sensing material comprising a plurality of individual sensing materials that are homogeneously or inhomogeneously mixed or locally patterned over specific portions of the LCR circuit such that each of the plurality of individual sensing materials is arranged to respond to analytes by predominantly different response mechanisms, and wherein the composite sensing material phase-separate due to hydrophylic/hydrophobic interactions, mutual immiscibility, or formed as sectors of individual materials deposited adjacent to each other onto a single sensor, or as formed as layers of individual materials deposited on top of each other onto a single sensor.

A sensor, comprising:

• a resonant inductor-capacitor-resistor (LCR) circuit;
• and
• a sensing material disposed over at least a portion of the LCR circuit, wherein the sensing material is configured to allow selective detection of at least six different analyte fluids from an analyzed fluid mixture, wherein the sensor is configured to sense a first fluid in the analyzed fluid in the presence of a second fluid in the analyzed fluid, and wherein a concentration of the second fluid is at least 1 million times greater than a concentration of the first fluid.