Walking of spider on water surface studied from its leg shadows<xref rid="cpb_27_8_084702fn1" ref-type="fn">*</xref> <fn id="cpb_27_8_084702fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 51323006 and 51425502) and the Tribology Science Fund of State Key Laboratory of Tribology (Grant No. SKLTKF17B18).</p></fn>

Walking of spider on water surface studied from its leg shadows* *

Project supported by the National Natural Science Foundation of China (Grant Nos. 51323006 and 51425502) and the Tribology Science Fund of State Key Laboratory of Tribology (Grant No. SKLTKF17B18).

Zheng Yelong¹, Lu Hongyu¹, Jiang Jile², Tao Dashuai¹, Yin Wei¹, Tian Yu^{1, †}

(color online) Shadows of superhydrophobic legs of water spider under point light illumination. (a) A water spider standing on water surface and a typical water spider shadow on the bottom surface of vessel. (b) Micro-morphology of a water spider leg with nanometer saw teeth on each hair. (c) Sketch of the shadow taken method in laboratory. (d) A typical water spider leg shadow and the distorted water surface profile section.