Abstract
A force spectroscopy model experiment is presented using a low-cost tensile apparatusdescribed earlier. Force–extension measurements of twisted rubber bands are obtained.They exhibit a complex nonlinear elastic behaviour that resembles atomic forcespectroscopy investigations of molecules of titin, a muscle protein. The model experimentsopen up intriguing possibilities to stimulate insight into entropy-driven self-organization ofsoft biological matter at the nanometre scale and into protein folding by hands-onexperience and analogical transfer.
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