Abstract: A mobile induction and power-generation device includes a disc-shaped magnet, a block magnet, and a coil. The block magnet has at least one magnetic pole set each having two adjacent magnetic poles with opposite polarities, and the at least one magnetic pole set moves along a movement trajectory relative to the disc-shaped magnet. The coil is disposed adjacent to the disc-shaped magnet or the block magnet, is induced by an alternating magnetic field generated by the movements of the disc-shaped magnet or the block magnet, and generates an induction current due to the alternating magnetic field.

Abstract: The present disclosure provides a fabrication of M-plane gallium nitride which is able to grow M-plane gallium nitride without the need of expensive substrates, such as LiAlO2, LiGaO2 or SiC. The fabrication of M-plane gallium nitride includes preparing a zinc oxide hexagonal prism having a growth face, and growing a gallium nitride layer on the growth face of the zinc oxide hexagonal prism. The growth face is an M-plane perpendicular to a direction of gravity.

Abstract: A mobile induction and power-generation device includes an induction movement magnetic element, a displacement magnetic element, and an induction coil. The displacement magnetic element has at least one magnetic pole set each having two adjacent magnetic poles with opposite polarities, and the at least one magnetic pole set moves along a movement trajectory relative to the induction movement magnetic element. The induction coil is disposed adjacent to the induction movement magnetic element or the displacement magnetic element, is induced by an alternating magnetic field generated by the movements of the induction movement magnetic element or the displacement magnetic element, and generates an induction current due to the alternating magnetic field.