Fig. 1: Wireless immunoassays for virus aerosol detection.
a Structure of ImmHR sensor for respiratory virus detection in forms of aerosol (<5 μm particles), and saliva droplets (large particles and liquids). b Mechanism of hydrogel immuno response and transduction of electrical signal. d thickness of the hydrogel. C, capacitance of the paired RF resonators. Fres, resonant frequency. c Scanning electron microscopy (SEM) images of hydrogels before (top) and after immersing in 1 ng/mL spiked solution for 3 h. Scale bar: 100 μm. The experiments are repeated three times with similar results. d Photos of assembled ImmHR sensors in forms of split rings (top) and spiral coils (bottom). Scale bar: 5 mm. e Multiplexed readout of ImmHR and temperature sensors for respiratory virus discrimination and infection monitoring.
