Compressed Sensing Image Reconstruction of Scanning Electrochemical Microscopy Measurements Carried Out at Ultrahigh Scan Speeds Using Continuous Line Probes,Analytical Chemistry

当前位置： X-MOL 学术 › Anal. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Compressed Sensing Image Reconstruction of Scanning Electrochemical Microscopy Measurements Carried Out at Ultrahigh Scan Speeds Using Continuous Line Probes
Analytical Chemistry ( IF 6.7 ) Pub Date : 2021-09-08 , DOI: 10.1021/acs.analchem.1c01869
Anna E Dorfi ₁ , Jingkai Yan _{2,

3} , John Wright _{1,

3} , Daniel V Esposito _{1,

4,

5}

Affiliation

Previous studies on scanning electrochemical microscopy (SECM) imaging with nonlocal continuous line probes (CLPs) have demonstrated the ability to increase areal imaging rates by an order of magnitude compared to SECM based on conventional ultramicroelectrode (UME) disk electrodes. Increasing the linear scan speed of the CLP during imaging presents an opportunity to increase imaging rates even further but results in a significant deterioration in image quality due to transport processes in the liquid electrolyte. Here, we show that compressed sensing (CS) postprocessing can be successfully applied to CLP-based SECM measurements to reconstruct images with minimal distortion at probe scan rates greatly exceeding the conventional SECM ″speed limit″. By systematically evaluating the image quality of images generated by adaptable postprocessing CS methods for CLP-SECM data collected at varying scan rates, this work establishes a new upper bound for CLP scan rates. While conventional SECM imaging typically uses probe scan speeds characterized by Péclet numbers (Pe) < 1, this study shows that CS postprocessing methods can allow for an accurate image reconstruction for Pe approaching 5, corresponding to an order of magnitude increase in the maximum probe scan speed. This upper limit corresponds to the onset of chaotic convective flows within the electrolyte for the probes investigated in this work, highlighting the importance of considering hydrodynamics in the design of fast-scanning probes.

中文翻译：

使用连续线探针以超高扫描速度进行扫描电化学显微镜测量的压缩传感图像重建

先前对使用非局部连续线探针 (CLP) 进行扫描电化学显微镜 (SECM) 成像的研究表明，与基于传统超微电极 (UME) 圆盘电极的 SECM 相比，能够将区域成像率提高一个数量级。在成像期间提高 CLP 的线性扫描速度提供了进一步提高成像速率的机会，但由于液体电解质中的传输过程会导致图像质量显着恶化。在这里，我们展示了压缩感知 (CS) 后处理可以成功应用于基于 CLP 的 SECM 测量，以大大超过传统 SECM“速度限制”的探针扫描速率重建具有最小失真的图像。通过对以不同扫描速率收集的 CLP-SECM 数据的适应性后处理 CS 方法生成的图像的图像质量进行系统评估，这项工作建立了 CLP 扫描速率的新上限。虽然传统的 SECM 成像通常使用由 Péclet 数表征的探针扫描速度（Pe ) < 1，这项研究表明 CS 后处理方法可以允许Pe接近 5的准确图像重建，对应于最大探针扫描速度的数量级增加。该上限对应于本工作中研究的探针在电解质内开始出现混沌对流，突出了在快速扫描探针设计中考虑流体动力学的重要性。

更新日期：2021-09-21

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11