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Autonomous control of interfacial electron transfer and the activation of DNA machines by an oscillatory pH system
Xiu-Juan Qi1, Chun-Hua Lu, Xiaoqing Liu
1The Key Lab of Analysis and Detection Technology for Food Safety of the MOE, College of Chemistry and Chemical Engineering, Fuzhou University , Fuzhou 350002, China.
Abstract:
An oscillatory pH system is implemented to drive oscillatory pH-switchable DNA machines and to control pH-stimulated electron transfer at electrode surfaces. The oscillatory pH system drives the autonomous opening and closure of DNA tweezers and activates a DNA pendulum by the pH-stimulated formation and dissociation of i-motif structures. Also, a sequence-programmed nucleic acid monolayer-functionalized electrode undergoes autonomous oscillatory pH transitions between random coil and i-motif configurations, leading to the control of electron transfer at electrode surfaces.
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