Instituto de Química Universidade de São Paulo , Av. Profesor Lineu Prestes, 748, São Paulo, São Paulo, Brazil 05508-000.
Anal Chem. 2017 Sep 5;89(17):8643-8649. doi: 10.1021/acs.analchem.7b01764. Epub 2017 Aug 9.
The design and fabrication of a versatile and low-cost electrochemical-scanning probe microscope (EC-SPM) is presented. The proposed equipment relies on the use of modern prototyping tools such as 3D printers and microcontroller boards and only a few "off-the-shelf" parts to deliver a simple yet powerful EC-SPM equipment capable of performing simple space-resolved electrochemical measurements. The equipment was able to perform space-resolved electrochemical measurements using a platinum ultramicroelectrode (UME) as the working electrode on a scanning electrochemical microscopy (SECM) configuration and was used to record approach curves, line scans, and array scans over an insulating substrate. The performance of the proposed equipment was found to be adequate for simple SECM measurements under hindered diffusion conditions. Because of its flexible design (software and hardware), more complex array scan patterns, only found on high-end EC-SPM setups such as hopping mode scan, were easily implemented on the built equipment. Despite its simplicity, the versatility and low cost of the proposed design make it an attractive alternative as a teaching platform as well as a platform for developing more elaborate EC-SPM setups.
本文提出了一种通用且低成本的电化学扫描探针显微镜（EC-SPM）的设计和制造方法。所提出的设备依赖于现代原型制作工具，如 3D 打印机和微控制器板，以及仅使用少数“现成”部件，以提供一种简单但功能强大的 EC-SPM 设备，能够进行简单的空间分辨电化学测量。该设备能够使用铂超微电极（UME）作为工作电极在扫描电化学显微镜（SECM）配置中进行空间分辨电化学测量，并用于在绝缘基底上记录接近曲线、线扫描和阵列扫描。发现该设备的性能足以满足受限扩散条件下的简单 SECM 测量。由于其灵活的设计（软件和硬件），更复杂的阵列扫描模式，仅在高端 EC-SPM 设备（如跳跃模式扫描）上找到，很容易在构建的设备上实现。尽管设计简单，但所提出设计的多功能性和低成本使其成为教学平台以及开发更精细的 EC-SPM 设备的平台的有吸引力的选择。
