Abstract: An acetone sensor including a substrate, a pair of interdigitated electrodes disposed on the substrate, and a sensing film disposed on the pair of interdigitated electrodes and having electrical conductivity that depends upon a concentration of acetone. A method for detecting acetone includes for each sensor of a plurality of sensors: generating a signal if said sensor is exposed to a sample of acetone having density greater than or equal to an acetone detection threshold of said sensor, wherein the plurality of sensors has a respective plurality of acetone detection limits that span a detection range. A method for forming an acetone sensor includes dissolving a co-polymer and suspending conductive nanoparticles in an organic solvent to form a sensing solution, and coating the solution to form a conductive sensing film disposed on a pair of interdigitated electrodes disposed on a substrate.

Abstract: A sensor for sensing diols and triols includes (a) a substrate, (b) a conductive coating disposed on the substrate and having affinity for binding with a substance selected from the group consisting of diols, triols, and a combination thereof, and (c) two electrodes in contact with the conductive coating to probe conductivity of the conductive coating so as to detect the substance from a reduction in the conductivity. A method for detecting vaping includes (a) measuring conductivity of a conductive coating having affinity for binding with an airborne substance selected from the group consisting of diols, triols, and a combination thereof, and (b) detecting presence of the airborne substance as a decrease in the conductivity.

Abstract: Systems and methods for the detection of one or more target molecules, such as benzene, are described. The systems and methods may include a molecularly imprinted polymer film; a sensing material, wherein the molecularly imprinted polymer film comprises a polymer host with one or more binding sites for one or more target molecules. The molecularly imprinted polymer film may be coated upon the sensing material.

Abstract: Systems and methods for the detection of one or more target molecules emitted from microbial sources are described. The systems and methods may include a molecularly imprinted polymer film; a strain sensitive surface, wherein the molecularly imprinted polymer film comprises a polymer host with one or more binding sites for one or more target molecules. The molecularly imprinted polymer film may be coated upon the strain sensitive surface.