On-Demand Electrochemical Fabrication of Ordered Nanoparticle Arrays using Scanning Electrochemical Cell Microscopy
On-Demand Electrochemical Fabrication of Ordered Nanoparticle Arrays using Scanning Electrochemical Cell Microscopy
复制标题
使用扫描电化学电池显微镜按需电化学制造有序纳米颗粒阵列
DOI：
10.1021/acsnano.2c09336
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发表时间：
2022
期刊：
影响因子：
17.1
通讯作者：
Hill, Caleb M.
中科院分区：
文献类型：
--
作者：
Rahman, Md. Maksudur;Tolbert, Chloe L.;Saha, Partha;Halpern, Jeffrey M.;Hill, Caleb M.
有序的纳米颗粒阵列是各种分析应用的有吸引力的平台，但此类阵列的制造通常具有挑战性。在这里，扫描电化学细胞显微镜(SECCM)可以被用作一种强大的、即时可重构的工具来制备有序纳米颗粒阵列。利用SECCM，通过在衬底电极和充满电解液的管子之间的界面上电沉积，直接制备了银纳米颗粒阵列。通过动态监测SECCM电池中流动的电流，可以检测和控制单个成核和生长事件，以产生尺寸可控的单个纳米颗粒。对所得阵列的表征表明，这种基于SECCM的方法能够实现对纳米颗粒位置的空间控制，可与所使用的吸管的终端直径相媲美，并能够直接控制阵列内每个位置处沉积的材料体积。这些结果为基于探针的电化学技术的使用提供了进一步的证据，例如SECCM作为除了分析之外的表面修饰的工具。
Well-ordered nanoparticle arrays are attractive platforms for a variety of analytical applications, but the fabrication of such arrays is generally challenging. Here, it is demonstrated that scanning electrochemical cell microscopy (SECCM) can be used as a powerful, instantly reconfigurable tool for the fabrication of ordered nanoparticle arrays. Using SECCM, Ag nanoparticle arrays were straightforwardly fabricated via electrodeposition at the interface between a substrate electrode and an electrolyte-filled pipet. By dynamically monitoring the currents flowing in an SECCM cell, individual nucleation and growth events could be detected and controlled to yield individual nanoparticles of controlled size. Characterization of the resulting arrays demonstrate that this SECCM-based approach enables spatial control of nanoparticle location comparable with the terminal diameter of the pipet employed and straightforward control over the volume of material deposited at each site within an array. These results provide further evidence for the utility of probe-based electrochemical techniques such as SECCM as tools for surface modification in addition to analysis.