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. 2013 May 26;58(8):1173–1243. doi: 10.1016/j.pmatsci.2013.05.001

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Fig. 13 — (a) Template of a nanochannel network constructed by symmetric Y-branched nanochannel. Reprinted with permission from [134]. © 2006 IOP Publishing Ltd. Several biological organisms that exhibit Steiner minimal tree networks: (b) cell walls of sisal (Reprinted with permission from [135]. © 2010 Springer-Verlag.), (c) soap bubbles (Reprinted with permission from [32]. © 2011 Royal Society of Chemistry.), (d) honeycombs, (e) spider webs (Reprinted with permission from [108]. © 2011 Elsevier B.V.) and (f) nano-nets.

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