Multitarget, quantitative nanoplasmonic electrical field-enhanced resonating device (NE2RD) for diagnostics

Biosensing technologies have significant impact on medical diagnostics but difficulties in the handling of complex biospecimens, portability, and nonlinearity in dynamic detection range present considerable technical bottlenecks in their translation into clinical settings. Here, we present the nanoplasmonic electrical field-enhanced resonating device (NE²RD) that detects and quantifies multiple biotargets from distinct clinical specimens (i.e., saliva, serum, and whole blood) with a broad linear dynamic range. Unlike conventional platforms, the NE²RD does not require lengthy sample-preparation steps, skilled personnel, or expensive infrastructure. Further, as a model clinical validation study, we monitored chemotherapy effects on viral load for coinfected patients on a single platform. Therefore, the portable NE²RD can be broadly applied to primary care and point-of-care settings with multiple clinical applications.