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Fabrication of nanopores in polymer foils with surfactant-controlled longitudinal profiles

机译:具有表面活性剂控制的纵向轮廓的聚合物箔中纳米孔的制备

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We present a surfactant-controlled etching method which allows the production of asymmetric track-etched nanopore membranes with diode-like ionic conductivity. The asymmetry of the pores is provided by self-assembly of amphiphilic molecules at the pore entrances on one side of the membrane during chemical etching while this process is excluded on the other side. By varying the alkali concentration in the etchant, control over the pore profile is achieved. The pore geometry is characterized in detail using field-emission scanning electron microscopy. The method is equally applicable to membranes with many and with single pores and may constitute an alternative to existing methods of production of resistive-pulse sensors.
机译:我们提出了一种表面活性剂控制的刻蚀方法,该方法允许生产具有类似二极管的离子电导率的不对称径迹刻蚀纳米孔膜。孔的不对称性是通过在化学蚀刻过程中两亲分子在膜的一侧孔入口处的自组装而提供的,而这一过程在另一侧被排除。通过改变蚀刻剂中的碱浓度,可以控制孔的轮廓。使用场发射扫描电子显微镜详细表征孔的几何形状。该方法同样适用于具有许多孔和单个孔的膜,并且可以构成现有的制造电阻脉冲传感器的方法的替代方法。

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