If you look at figure 2a, it looks like they are dropping successively more concentrated samples of SARS-CoV-2 onto the sensor and getting immediate spikes in t

If you look at figure 2a, it looks like they are dropping successively more concentrated samples of SARS-CoV-2 onto the sensor and getting immediate spikes in the response. But it's not clear whether or not this technology could be developed into something that can be used at home or in the field. That is the real challenge you need to overcome in order to make a test with a quick response. Packaging a sample, sending it to a lab, getting a technician to put the sample through the test, recording the result and communicating it back to the patient - that is what takes time not the actual performance of the test itself.