Light-Activated Electrochemistry for the Two-Dimensional Interrogation of Electroactive Regions on a Monolithic Surface with Dramatically Improved Spatial Resolution
MetadataShow full item record
The concept of light-activated electrochemistry (LAE) was recently presented where faradaic electrochemistry could be spatially resolved on a monolithic silicon electrode by illuminating the specific region with light. A major implication from the previous study using illumination from the nonsolution side, or backside, is that the spatial resolution is limited by the finite thickness of silicon wafer. To overcome this restriction, and enable the further application of LAE, in combination with optical imaging for example, herein the spatial resolution of LAE using topside illumination (illumination from the solution side) is explored. The applied potential and irradiated light intensity are found to have significant effects on the spatial resolution. A spatial resolution of ~30 µm was achieved with optimal parameters, which is a 20 times improvement compared with the previously reported backside illumination design, demonstrating the potential application of the strategy including microarray patterning of silicon or for single cell analysis.
This open access article is distributed under the Creative Commons license http://creativecommons.org/licenses/by-nc/4.0/
Showing items related by title, author, creator and subject.
Choudhury, M.; Ciampi, Simone; Lu, X.; Kashi, M.; Zhao, C.; Gooding, J. (2017)© 2017 Elsevier LtdHerein we show that faradaic electrochemistry can be confined to a discrete region of a monolithic semiconducting electrode by means of locally addressing the kinetics of electron transfer with a focused ...
Light-activated electrochemistry on alkyne-terminated Si(100) surfaces towards solution-based redox probesWu, Y.; Kashi, M.; Yang, Y.; Gonçales, V.; Ciampi, Simone; Tilley, R.; Gooding, J. (2016)Light-activated electrochemistry is a powerful concept, where faradaic electrochemistry at a monolayer protected monolithic silicon electrode can be ‘turned on’ at any location with micron scale resolution simply by ...
Goyens, C.; Marty, S.; Leymarie, E.; Antoine, David; Babin, M.; Bélanger, S. (2018)©2018. American Geophysical Union. We introduce a new method to determine the anisotropy of reflectance of sea ice and snow at spatial scales from 1 m 2 to 80 m 2 using a multispectral circular fish-eye radiance camera ...