Figure 3.

Building a second order modified Sierpinski square. (A) Squares of area D at the corners of a rectilinear interior pattern are cut out and divided into four smaller squares of area E = D/4 to be attached to outer boundary of electrode as shown by arrows. Target locations P1 through P15 are indicated. (B) Cut-outs for the remaining interior squares are distributed according to a different pattern. (C) Squares placed at the same location are merged into a single larger square of equivalent surface area F = 3 × E. See text for further details.