A special artifi cial spider silk is presented which is fabricated by using both an elastic polymerand a fi ber, and the water collection behavior is investigated. Through exerting tension invarying degree, the length of the three-phase contact line (TCL) and the area of spindle knotcan be regulated readily, which makes a great contribution to the improvement of collectingefficiency and water-hanging ability. The water-hanging ability can be predicted at a givenstretching ratio according to the given expression of the TCL. As a result, liquid capture orrelease of distinct measure can be achieved via exerting tension. This research is helpful todesign smart materials for developing applications in fogwater collection, dehumidifi cation,high-effi ciency humidity control,and controllable adhesion.
