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Nanoscale intermittent contact-scanning electrochemical microscopy
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Lazenby, Robert A., McKelvey, Kim M. (Kim Martin), Peruffo, Massimo, Baghdadi, Marc and Unwin, Patrick R. (2013) Nanoscale intermittent contact-scanning electrochemical microscopy. Journal of Solid State Electrochemistry, Volume 17 (Number 12). pp. 2979-2987. doi:10.1007/s10008-013-2168-2 ISSN 1432-8488.
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WRAP_1050272-ch-141013-nanoscale_intermittent.pdf - Accepted Version Download (1217Kb) | Preview |
Official URL: http://dx.doi.org/10.1007/s10008-013-2168-2
Abstract
A major theme in scanning electrochemical microscopy (SECM) is a methodology for nanoscale imaging with distance control and positional feedback of the tip. We report the expansion of intermittent contact (IC)-SECM to the nanoscale, using disk-type Pt nanoelectrodes prepared using the laser-puller sealing method. The Pt was exposed using a focused ion beam milling procedure to cut the end of the electrode to a well-defined glass sheath radius, which could also be used to reshape the tips to reduce the size of the glass sheath. This produced nanoelectrodes that were slightly recessed, which was optimal for IC-SECM on the nanoscale, as it served to protect the active part of the tip. A combination of finite element method simulations, steady-state voltammetry and scanning electron microscopy for the measurement of critical dimensions, was used to estimate Pt recession depth. With this knowledge, the tip-substrate alignment could be further estimated by tip approach curve measurements. IC-SECM has been implemented by using a piezo-bender actuator for the detection of damping of the oscillation amplitude of the tip, when IC occurs, which was used as a tip-position feedback mechanism. The piezo-bender actuator improves significantly on the performance of our previous setup for IC-SECM, as the force acting on the sample due to the tip is greatly reduced, allowing studies with more delicate tips. The capability of IC-SECM is illustrated with studies of a model electrode (metal/glass) substrate.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
Library of Congress Subject Headings (LCSH): | Electrochemistry, Electron microscopy, Focused ion beams, Nanoelectronics | ||||
Journal or Publication Title: | Journal of Solid State Electrochemistry | ||||
Publisher: | Springer | ||||
ISSN: | 1432-8488 | ||||
Official Date: | 28 July 2013 | ||||
Dates: |
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Volume: | Volume 17 | ||||
Number: | Number 12 | ||||
Page Range: | pp. 2979-2987 | ||||
DOI: | 10.1007/s10008-013-2168-2 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 25 December 2015 | ||||
Date of first compliant Open Access: | 25 December 2015 | ||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC), European Research Council (ERC), Advantage West Midlands (AWM), European Regional Development Fund (ERDF) | ||||
Grant number: | EP/H023909/1 (EPSRC) ; ERC-2009-AdG247143 QUANTIF) (ERC) |
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