Novel strategy for constant-distance imaging using alternating current scanning electrochemical microscopy |
| |
| Affiliation: | 1. Institute of Analytical and Bioanalytical Chemistry, University of Ulm, Ulm, Germany;2. Institute of Inorganic Chemistry II, University of Ulm, Ulm, Germany;3. Fraunhofer Institute for Applied Solid State Physics, Freiburg, Germany;1. Department of Chemical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;2. CQE- Centro de Química Estrutural, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;3. Department of Chemistry, University of La Laguna, P.O. Box 456, E-38200 La Laguna, Tenerife, Canary Islands, Spain;1. Department of General and Physical Chemistry, Faculty of Sciences, University of Pécs, 7624 Pécs, Ifjúság útja 6, Hungary;2. János Szentágothai Research Centre, University of Pécs, 7624 Pécs, Ifjúság útja 20, Hungary;1. PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France;2. State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China;1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;2. CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;3. University of Chinese Academy of Sciences, (UCAS) 19A Yuquan Road, Shijingshan District, Beijing, 100049, China;4. Department of Pure and Applied Chemistry, University of Calabar, Calabar, PMB 1115 Nigeria;1. CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;2. Department of Chemistry, Northeastern University, Shenyang 110004, China;3. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
| |
| Abstract: | ![]()
Scanning electrochemical microscopy (SECM) still lacks reliable means for performing constant-distance imaging experiments. We demonstrate, for the first time, that the same negative alternating current (AC) feedback can be observed on approach to an insulator and an unbiased conductor at optimal experimental conditions. This leads to a novel constant-distance imaging mode. To perform AC-SECM imaging, only minor modifications of the existing SECM set-up were necessary. The new constant-distance AC-SECM imaging was conducted to provide topographical information not affected by variations in sample conductivity and reactivity. Furthermore, simultaneous AC and DC SECM measurements were carried out to demonstrate that both topographical and chemical information could be revealed. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
