Implementation of a coplanar-waveguide chip for the measurement of EM wave absorption spectrum of SARS-Cov-2 virus

Comment on Manna et al. SARS-CoV-2 Inactivation in Aerosol by Means of Radiated Microwaves. Viruses 2023, 15, 1443

“…This is often simply referred to as Lamb’s theory or equation, and only requires the radius of the sphere, as well as its longitudinal and transverse sound velocities, as input ( Appendix A ). Recent studies have investigated microwave resonant absorption as a mechanism for inactivating spherical viruses [ 3 , 4 , 5 , 6 , 7 , 8 ]. These studies propose that virus inactivation results from a structural-resonant energy transfer (SRET) process, where electromagnetic fields matching the frequency of the dipolar mode of a virus capsid excite a confined acoustic vibration which damages its structure [ 9 ].…”

“…Although most inactivation studies have empirically tested the effectiveness of a range of microwave frequencies, the frequency of the dipolar mode can be measured directly using microwave absorption spectroscopy [ 9 , 10 , 11 , 12 , 13 , 14 ]. The peak absorption frequency from spectroscopy can then be used as the centre of a frequency range to test for inactivation experiments [ 7 , 9 , 10 ]. Alternatively, Lamb’s equation can be used to calculate the dipolar resonant frequency across the size range of the virus, which indicates a frequency range over which inactivation can be tested [ 1 , 15 ].…”