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. 2022 Mar 9;1203:339702. doi: 10.1016/j.aca.2022.339702

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Fig. 1 — Illustration of PD-LAMP process. (I) The sample is collected and (II) loaded into the test chip containing lyophilized reagents and streptavidin coated particles for PD. (III) The chip is heated on an ITO-PET heater for 35 min and then (IV) the amplified product is placed into the (V) smartphone device. (VI) A 30 s video is taken of the sample and the results are analyzed (VII) indicating the presence or absence of SARS-CoV-2 based on particle diffusivity.