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. 2015 Mar 30;6:6636. doi: 10.1038/ncomms7636

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(a) shows the chain (arrowed) of Fig. 1c where a new time zero is defined. (b) shows the situation after 0.6 s; the chain has ruptured. The relaxation of the bottom contact towards the upper left corner of the image in b demonstrates that the chain has been under mechanical stress. Scale bar, 2 nm.