About the Cover:

Evaporation-induced self-assembly of block copolymers into an isoporous structure is achieved on the inner surface of a hollow fiber membrane with an inner diameter of about 1 mm. The fabrication process introduces a highly asymmetric inside-out isoporous composite hollow fiber membrane having a significant difference in pore sizes on the inner and outer surfaces from about 25 nm to 2.5 μm, respectively. Image courtesy of Kirti Sankhala, Thorsten Wolff, Joachim Koll and Volker Abetz.