High-efficient ZnO-based nanorod array light-emitting diodes (LEDs) were grown by an oblique-angle deposition scheme. Due to the shadowing effect. the inclined ZnO vapor-flow was selectively deposited on the tip surfaces of pre-fabricated p-GaN nanorod arrays. resulting in the formation of nanosized heterojunctions. https://www.sjcaindia.com/product-category/metal-pipes/