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Spin Transfer Torque Magnetic Random Access Memories (STT-MRAM) are based on Magnetic Tunnel Junctions (MTJs) made out of two ferromagnetic electrodes separated by a MgO tunnel barrier.
In the last decades the electrical stimulation therapy has played an important role for neural regeneration. However, the amplitude of electric shocks will be decayed greatly after penetrating into biological tissues. The patient will also suffer from the skin injury caused by electrodes. Recent years, the positive effect of magnetic stimulation on neuronal growth has been studied for several years...
This paper described a novel directional underwater thruster which could change thrust directions without any moving parts. When the underwater thruster moved along a non-vertical angle, it could produce straight backward thrust of 2.3mN and lateral thrust of 0.6mN in parallel on the device surface, with the total thrust/weight ration of 2:1. Water jet was streamed out by high intensity acoustic beam...
This paper presents localized cell lysis using a self focused acoustic transducer (SFAT). The 18 MHz acoustic waves generated by the SFAT focus at a spot of around 100 mum in diameter with a peak intensity of 25 W/cm2, which is strong enough to produce acoustic cavitation at such high frequency. With the great pressure and temperature produced by the cavitation, cells are broken and detached in a...
This paper described ultraviolet (UV) radiation sensing using ZnO based Film Bulk Acoustic-wave Resonator (FBAR). The resonant frequency upshifted when there was UV illumination on the FBAR. For 365 nm UV light, the frequency upshift was 9.8 kHz with an intensity of 600 muW/cm2, and the detection limit of the sensor was 6.5 nW. The frequency increase of the FBAR UV sensor was proposed to be due to...
The microstructural and electrical properties of ferroelectric/ZnO heterostructures fabricated on SrTiO3 substrates by pulsed laser deposition (PLD) were investigated. Reflection high-energy electron diffraction (RHEED) and X-ray diffraction (XRD) were employed to characterize the orientation of the samples. On ferroelectric oxide surfaces of (001) and (111) orientations, both of ZnO films followed...
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