Stronger water hanging ability and higher water collection efficiency of bioinspired fiber with multi-gradient and multi-scale spindle knots

Bioinspired fibers with multi-gradient and multi-scale spindle knots are artfully fabricated via combining a dip-coating technique and a water droplet templating method. Due to the effective cooperation of multi-gradient and multi-scale spindle knots, the bioinspired fiber achieves a much stronger water-hanging ability and higher collecting efficiency.