The impact of high-frequency (1.2 MHz) ultrasound with a power density of 0.33 W cm(-2) on microcapsule nanocomposite shells with embedded zinc oxide nanoparticles was investigated by exploring modeling simulations and direct visualization. For the first time the sonication effect has been monitored in situ on individual microcapsules upon exposure of their aqueous suspension to ultrasound. The stress distribution on the microcapsule shell for the impact of ultrasound with high (1.2 MHz) and low (20 kHz) frequency at two fixed intensities (0.33 and 30 W cm(-2)) has been modeled. As shown in silico and experimentally the nanocomposite microcapsules were destroyed more effectively by the action of high-frequency (1.2 MHz) ultrasound in comparison to the low frequency (20 kHz) one with the same power density.

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A SAW radio frequency identification (RFID) tag has been investigated theoretically and exper imentally in the 6 GHz frequency band. In the calculations, the finite thickness of the electrodes, the differ ence between the acoustic properties of thin film and bulk aluminum, and the bulk scattering of the SAW energy by the electrodes are taken into account. The computed test RFID tag (with equidistant arrangement of signal reflectors) has been manufactured with the use of electron beam lithography. It is shown that the measured and calculated RFID tag time responses to the interrogating pulse are in good agreement and the code pulse loss level is 50-55 dB.

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