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Li Z.,Geology Institute of Shengli Oilfield | Wang H.,Geology Institute of Shengli Oilfield | Song X.,Geology Institute of Shengli Oilfield | Yan J.,CAS Lanzhou Institute of Chemical Physics | And 2 more authors.
Journal of Electroanalytical Chemistry

Stimuli-responsive polymer brushes modified surfaces and binary polymer surfaces can be created on an initiator terminated substrate via surface initiated atom-transfer radical polymerization (SI-ATRP), in which the growth kinetics can be modulated by Cu(II) ratio. As stimuli-responsive brushes, many environmental triggers can drive their conformation change such as pH and salt concentration. The external-stimuli modulated reversible conformational changes of polymer brushes can influence the charge transport behavior investigated by electrochemistry method, which have potential applications in in situ switching ion permeability and charge transport. The charge transport of binary polymer brush can be switched on or off by different ion flexibly which is an electrochemical logic switch. © 2014 Elsevier B.V. Source

Wu Y.,CAS Lanzhou Institute of Chemical Physics | Wu Y.,University of Chinese Academy of Sciences | Cai M.,CAS Lanzhou Institute of Chemical Physics | Li Z.,Geology Institute of Shengli Oilfield | And 6 more authors.
Journal of Colloid and Interface Science

Water slips exist over superhydrophobic solid surfaces, but the slip flow of diverse liquids on a single surface has not been deliberately studied to date. Here, we report the slip flow behavior of a variety of liquids with different surface tensions and viscosities on a robust omniphobic surface. This surface displayed a dramatic slippage effect and thus a high drag reduction efficiency of approximately 10-20% for all liquids, depending on both liquid viscosity and surface energy. The observed liquid slip was attributed to the surface dual micro/nanostructure and the low-surface-energy coating. © 2013 Elsevier Inc. Source

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