Fabrication of bio-inspired hydrophobic self-assembled electrospun nanofiber based hierarchical structures
Reason for embargo
In this letter, we present a facile approach to fabricate hydrophobic surfaces based on electrostatic field assisted self-assembly of fibers onto conductive micropillars. Hydrophobic patterns fabricated in this work are inspired by an underwater fern Salvinia molesta. Hydrophilic cellulose acetate nanofibers were electrospun on a conducting micro-patterned surface to create a hierarchical structure. The water contact angle increased from just below 70° (hydrophilic) on the micro-patterned structures to ∼140° (hydrophobic) for the hierarchical structures. Introduced hydrophobicity is due to the pinning of the water droplet to suspended hydrophilic nanofibers and a reduced solid-water interface.
This work is supported by DST-UKIERI (IND/CONT/E/14-15/370 & DST/INT/UK/P-92/14) project. MK acknowledges assistance with the use of FESEM facility at the University of Exeter. Authors acknowledge IIT Hyderabad for providing research facilities required for carrying out experiments
This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record.
Vol. 196, pp. 339 - 342