A novel multifunctional, proton-fueled DNA nano-spring has been constructed. By incorporation of the G-quadruplex/i-motif sequence into the assembly, the nanodevice can perform spring-like motions in response to changes in the environmental pH without permanent deformation. Nanosized objects/functional groups could be assembled/disassembled into this system in an addressable, contractile, and reversible manner.
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Wang et al. (2010) studied this question.
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