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Humidity Effect on Nanoscale Electrochemistry in Solid Silver Ion Conductors and the Dual Nature of Its Locality

Journal Article · · Nano Letters
DOI:https://doi.org/10.1021/nl5040286· OSTI ID:1185744
 [1];  [1];  [1];  [1];  [2];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Seoul National Univ. (Korea, Republic of)
Scanning probe microscopy (SPM) is a powerful tool to investigate electrochemistry in nanoscale volumes. While most SPM-based studies have focused on reactions at the tip-surface junction, charge and mass conservation requires coupled and intrinsically non-local cathodic and anodic processes that can be significantly affected by ambient humidity. Here, we explore the role of water in both cathodic and anodic processes, associated charge transport, and topographic volume changes depending on the polarity of tip bias. The first-order reversal curve current-voltage technique combined with simultaneous detection of the sample topography, referred to as FORC-IVz, was applied to a silver solid ion conductor. We found that the protons generated from water affect silver ionic conduction, silver particle formation and dissolution, and mechanical integrity of the material. This work highlights the dual nature (simultaneously local and non-local) of electrochemical SPM studies, which should be considered for comprehensive understanding of nanoscale electrochemistry.
Research Organization:
Center for Nanophase Materials Sciences (CNMS); Oak Ridge National Laboratory (ORNL)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1185744
Journal Information:
Nano Letters, Journal Name: Nano Letters Journal Issue: 2 Vol. 15; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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  • Rodrigues, Ana Candida Martins; Nascimento, Marcio Luis Ferreira; Bragatto, Caio Barca
  • The Journal of Chemical Physics, Vol. 135, Issue 23 https://doi.org/10.1063/1.3666835
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Cited By (5)

Facilitate Measurement of Electrochemical Reactions in Redox-Based Memristors by Simply Thickening the Electrolyte Layer journal March 2018
Strongly enhanced oxygen ion transport through samarium-doped CeO2 nanopillars in nanocomposite films journal October 2015
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Dynamic mechanical control of local vacancies in NiO thin films journal May 2018
Characterization of local electric properties of oxide materials using scanning probe microscopy techniques: A review journal October 2018

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