Abstract
In this work, we introduce a radically new approach for achieving doubly resonant light-to-sound conversion with radiofrequency waves, namely, electromagnetic waves in the range of 1–100 MHz. By ta...
Highlights
In this work, we introduce a radically new approach for achieving doubly resonant light-to-sound conversion with radiofrequency waves, namely, electromagnetic waves in the range of 1−100 MHz
The composites correspond, respectively, to a carbon nanofiber (CNF) at 6 wt % embedded in silicone[13], graphene dissolved at 3 wt % in a polydimethylsiloxane (PDMS) matrix[11], a solution of Al in acrylic/polyurethane at 86 vol %12, multiwalled carbon nanotubes (MWCNT) in alumina at 12 wt %,7 an amorphous alloy of Fe78Si9B13 dispersed in an epoxy matrix with a volume fraction of 78 vol %, and the latter epoxy solution with a volume fraction of 83 vol %
The radio frequency (RF)-metamaterial microparticles can be used for multipurpose applications involving electromagnetic, thermal, and mechanical fields
Summary
We introduce a radically new approach for achieving doubly resonant light-to-sound conversion with radiofrequency waves, namely, electromagnetic waves in the range of 1−100 MHz. In brain white matter the penetration depth is 50 cm at 12 MHz.[2] In other words, the use of radio waves for ultrasound imaging would enable wholebrain imaging or even a total-body diagnostic with an extraordinary spatial resolution of 1−10 μm,[1,3] i.e., single-cell resolution, that could be reached with ultrasound recording combined with photoacoustics stimulation in the radio regime.[4] due to tissue transparency, radio waves would require a transducer to be converted into acoustic waves In this context, metamaterial-based mesostructures offer a versatility that is unprecedented by conventional nanomaterials. The intensity of the PA pressure P generated in a nanomaterial is proportional to the absorption cross section σabs and the Grüneisen coefficient γ20
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