2018-Sustainable Industrial Processing Summit
SIPS2018 Volume 2. Amatore Intl. Symp. / on Electrochemistry for Sustainable Development
| Editors: | F. Kongoli, H. Inufasa, M. G. Boutelle , R. Compton, J.-M. Dubois, F. Murad |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2018 |
| Pages: | 216 pages |
| ISBN: | 978-1-987820-84-3 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Nanoscale Electrochemical Imaging for Functional Materials
Tomokazu Matsue1;1TOHOKU UNIVERSITY, Sendai, Japan;
Type of Paper: Regular
Id Paper: 142
Topic: 47
Abstract:
Electrochemical imaging [1] is an emerging technology used to understand localized functions of various materials, because the unique functions of biomaterials, energy materials, and other materials are in many cases based on electrochemical phenomena. Electrochemical imaging is categorized into two basic ways: imaging using micro/nanoelectrode arrays, and scanning micro/nanoelectrochemical probes. In this presentation, I will show the basic outlines and recent progress of nanoscale electrochemical imaging using scanning probes.
Although a scanning electrochemical microscope (SECM) has become popular, the distance control between the probe and sample has still been a big challenge to improve temporal resolution and sensitivity. We adopted voltage-switching mechanisms to attain high resolution bioimaging in SECM systems and applied to simultaneous imaging of topography and electrochemical responses live cells [2]. We also incorporated an ion-conductance feedback for nanoelectrochemical imaging and applied to rapid, non-invasive bioimaging of live cells [3]. This system affords information on dynamic changes of nanostructures of cell membrane surfaces. Capacitive currents can also be used for feedback signal to control the distance. We incorporated this feedback mechanism to develop a nano-scanning electrochemical cell microscope (SECCM) and applied to characterization of localized battery materials with resolution of less than 100 nmm [4]. The technique measures electrode topography and different electrochemical properties simultaneously, and the information can be combined with complementary microscopic techniques to reveal new perspectives on structure and activity. The nanoscale SECCM (NanoSECCM) exhibit highly spatially heterogeneous electrochemistry at the nanoscale, both within secondary particles and at individual primary nanoparticles, which is highly dependent on the local structure and composition. We also applied NanoSECCM to characterize functional 2D materials.
Keywords:
Bioelectrochemistry; Living cells; Scanning electrochemical microscopy (SECM); Surface reaction mechanisms;References:
[1] Y. Takahashi et al., Anal.Chem., 2017, 89, 342; K. Ino et al., Cur. Opinion Electrochem., in press.[2] Y. Takahashi et al., PNAS, 2012, 109, 11540.
[3] Y. Takahashi et al, JACS., 2010, 132, 10118; Angew. Chem. Int. Ed., 2011, 50, 9638; Y. Nashimoto et al., ACS Nano, 2016, 10, 6915; H. Ida et al. Anal Chem., 2017, 89, 6016.
[4] Y. Takahashi et al., Nature Commun., 2014, 5, 6450.