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. Author manuscript; available in PMC: 2019 Jun 22.
Published in final edited form as: Chem Rev. 2019 Mar 27;119(8):5298–5415. doi: 10.1021/acs.chemrev.8b00593

Figure 33.

Figure 33.

(A) SEM image of a 3D cotton-ball-like foam with a highly porous structure obtained by collecting PCL nanofibers in a nonconductive spherical dish embedded with an array of metal probes. (B) SEM image of a 3D foam comprised of nanofibers made of a blend of PAN and SiO2 fabricated by homogenizing short nanofibers, followed by freeze-drying. (C) SEM image of a 3D foam comprised of PCL nanofibers fabricated through thermally induced agglomeration of short PCL nanofibers, followed by freeze-drying. (D) SEM image of a 3D foam with a highly ordered structure fabricated by expanding a mat of random PCL nanofibers. Photographs of the corresponding 3D foams are shown in the insets. (A) Reprinted with permission from ref 512. Copyright 2011 Elsevier. (B) Reprinted with permission from ref 514. Copyright 2014 Springer Nature. (C) Reprinted with permission from ref 517. Copyright 2015 Wiley-VCH. (D) Reprinted with permission from ref 525. Copyright 2016 Wiley-VCH.