Abstract: A system for detecting COVID-19 infection, including a colorimetric sensor, an image-capturing device, and a processing unit connected to the image-capturing device. The colorimetric sensor includes an injection zone and a detection zone patterned on a paper, where the injection zone covers the detection zone by folding the paper. The injection zone is configured to inject a saliva sample acquired from a person thereon. The detection zone includes an array of chemical receptors configured to interact with the injected saliva penetrating into the detection zone. The processing unit is configured to perform a method of capturing a first image from the detection zone before injection of the saliva sample, capturing a second image from the detection zone after injection of the saliva sample, and detecting COVID-19 infection status of the person by analyzing color changes of the array of chemical receptors in the second image respective to the first image.

Abstract: A system for detecting COVID-19 infection, including a colorimetric sensor, an image-capturing device, and a processing unit. The colorimetric sensor includes an array of chemical receptors configured to be exposed to exhaled breath of a person suspected to be infected by COVID-19 virus. The array of chemical receptors includes an array of metalloporphyrazines, an array of organic dyes, an array of metalloporphyrins, an array of metal ion complexes, and an array of functionalized gold nanoparticles (AuNPs). The processing unit is configured to perform a method utilizing the image-capturing device. The method includes capturing a first image from the array of chemical receptors before exposure to exhaled breath, capturing a second image from the array of chemical receptors after exposure to exhaled breath, and detecting COVID-19 infection status of the person by analyzing color changes of the array of chemical receptors in the second image respective to the first image.

Abstract: A system for detecting COVID-19 infection, including a colorimetric sensor, an image-capturing device, and a processing unit connected to the image-capturing device. The colorimetric sensor includes an injection zone and a detection zone patterned on a paper, where the injection zone covers the detection zone by folding the paper. The injection zone is configured to inject a saliva sample acquired from a person thereon. The detection zone includes an array of chemical receptors configured to interact with the injected saliva penetrating into the detection zone. The processing unit is configured to perform a method of capturing a first image from the detection zone before injection of the saliva sample, capturing a second image from the detection zone after injection of the saliva sample, and detecting COVID-19 infection status of the person by analyzing color changes of the array of chemical receptors in the second image respective to the first image.