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A new ionic current rectification device responsive to a broad range of pH stimuli has been established using highly ordered nanochannels of porous anodic alumina membrane (PAA) with abrupt surface charge discontinuity.The asymmetric surface charge distribution is achieved by patterning the nanochannels with surface amine functional groups at designed positions using a two-step anodization process.Due to the protonation/deprotonation of the patterned amine and the remaining intrinsic hydroxyl groups upon solution pH variation,the nanochannels array-based device is able to regulate ion transport selectivity and ionic current rectification properties.The present ionic device is promising for biosensing,molecular transport and separation,and drug delivery in confined environments.