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Imparting chemical specificity to nanometer-spaced electrodes

机译:损害纳米间距电极的化学特异性

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In this paper we are demonstrating an electrochemically driven self-assembling approach to achieve the space-resolved chemical functionalization of nanoelectrodes. After forming a self-assembled monolayer of electroactive quinones on a pair of nano-spaced (< 100 nm) electrodes, we enabled the binding of ssDNA exclusively on a single nanoelectrode by controlling the oxidation state at each modified electrode. This procedure attained the chemical differentiation of otherwise identical nanoelectrodes as the immobilized ssDNA retained its hybridization ability. Furthermore, we established that Kelvin probe force microscopy is a suitable space-resolved analytical technique for detecting this chemical functionalization at the nanoscale. The reported approach, enabling the space-selective patterning of (bio)molecules on nanoelectrode surfaces, can find application in complex nanosensor structure and molecular electronics implementations.
机译:在本文中,我们正在演示一种电化学驱动的自组装方法,以实现纳米电极的空间分辨化学功能化。在一对纳米间距(<100 nm)的电极上形成自组装的电活性醌单层后,我们通过控制每个修饰电极上的氧化态,使ssDNA仅在单个纳米电极上结合。由于固定的ssDNA保留了其杂交能力,因此该程序获得了其他方面相同的纳米电极的化学分化。此外,我们建立了开尔文探针力显微镜技术是一种合适的空间分辨分析技术,可以在纳米级检测这种化学功能。报道的方法使得能够对纳米电极表面的(生物)分子进行空间选择性图案化,可以在复杂的纳米传感器结构和分子电子学实现中找到应用。

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