A new visual immunoassay for prostate-specific antigen using near-infrared excited CuxS nanocrystals and imaging on a smartphone†
Abstract
A photothermal immune-imaging assay was innovatively designed for the visual quantitative detection of cancer biomarkers by coupling CuxS nanocrystals with a portable infrared thermal imager on a smartphone. The rolling circle amplification (RCA) technique was used for the formation of a CuxS nanocrystal concatemer, thus opening up new territories in immunoassay development.