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Sequential Nano-Explosion Using Patterned Porous Silicon

This paper reports a novel method to study and control explosions of explosive porous silicon (porous silicon impregnated with an oxidizer). This is achieved by transferring an explosion from one site to another by adjusting size and distance between locally defined areas of porous silicon. Using standard microtechnology, porous silicon can be locally generated on a silicon wafer surface in such a way that the amount of exploding porous silicon is controlled by the layout. Such an approach allows a domino-like sequence of explosions on a single chip using only one manual ignition. Confinement and sequential explosions were studied for different dimensions of porous silicon areas with different shapes (circle, rectangle, and square) and separation distances between them. A critical separation distance between porous silicon sites is found in which sequential explosions have achieved. [2017-0260]