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. 2015 Jun 11;5:10768. doi: 10.1038/srep10768

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Copyright © 2015, Macmillan Publishers Limited

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(a) Measured deflection of the cantilever due to the PDMS micro-tentacle’s grabbing force. The inset shows the experimental setup (MW: metal wire, SMF: glass optical fiber, MT: micro-tentacle). The solid line represents δ_c, the deflection at the grabbing point (h_g), calculated based on the standard beam deflection theory with the point-loaded force of 0.78 mN. The measured δ_c begins to deviate from the theory after it exceeds 90 μm, the maximum stroke achievable with the current setup. (b) and (c) Optical micrographs showing the micro-tentacle’s ability to grab and hold a Mallotus villosus egg by winding around it conformally. (d) Optical micrograph of another micro-tentacle grabbing and holding an ant. (Scale bar: 500 μm for all).