Hmmm, interesting.
My block really does focus most of the thermal spread in 2 dimensions, which would somewhat suit a substance like what's being mentioned above. However, we can't underestimate the need for side-ways thermal spread since even if the heat does spread up and out along a plane (ie, up the fins), it still needs to move sideways to make contact with the fin->water interface (wall).
Very interesting substance to be working with.
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