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Heteronanojunctions with atomic size control using a lab-on-chip electrochemical approach with integrated microfluidics

机译:使用集成微流控技术的芯片实验室电化学方法控制原子尺寸的杂纳米结

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摘要

A versatile tool for electrochemical fabrication of heteronanojunctions with nanocontacts made of a few atoms and nanogaps of molecular spacing is presented. By integrating microfluidic circuitry in a lab-on-chip approach, we keep control of the electrochemical environment in the vicinity of the nanojunction and add new versatility for exchanging and controlling the junction's medium. Nanocontacts made of various materials by successive local controlled depositions are demonstrated, with electrical properties revealing sizes reaching a few atoms only. Investigations on benchmark molecular electronics material, trapped between electrodes, reveal the possibility to create nanogaps of size matching those of molecules. We illustrate the interest of a microfluidic approach by showing that exposure of a fabricated molecular junction to controlled high solvent flows can be used as a reliability criterion for the presence of molecular entities in a gap.
机译:提出了一种用于电化学制造异质结的通用工具,该异质结具有由几个原子和分子间距的纳米间隙构成的纳米接触。通过将微流体电路集成到芯片实验室方法中,我们可以控制纳米结附近的电化学环境,并增加了交换和控制结介质的新功能。通过连续的局部控制沉积,证明了由各种材料制成的纳米触点,其电学性质表明其尺寸仅达到几个原子。对被困在电极之间的基准分子电子材料的研究表明,有可能形成尺寸与分子大小相匹配的纳米间隙。我们通过显示制造的分子结暴露在受控的高溶剂流量下,可以用作间隙中分子实体存在的可靠性标准,从而说明了微流体方法的兴趣。

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