skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Optically Transparent Thin-Film Electrode Chip for Spectroelectrochemical Sensing

Abstract

The electrochemical and spectroelectrochemical applications of an optically transparent thin film electrode chip are investigated. The working electrode is composed of indium tin oxide (ITO); the counter and quasi-reference electrodes are composed of platinum. The stability of the platinum quasi-reference electrode is modified by coating it with a planar, solid state Ag/AgCl layer. The Ag/AgCl reference is characterized with scanning electron microscopy and energy-dispersive X-ray spectroscopy. Open circuit potential measurements indicate that the potential of the planar Ag/AgCl electrode varies a maximum of 20 mV over four days. Cyclic voltammetry measurements show that the electrode chip is comparable to a standard electrochemical cell. Randles-Sevcik analysis of 10 mM K3[Fe(CN)6] in 0.1 M KCl using the electrode chip shows a diffusion coefficient of 1.59 × 10-6 cm2/s, in comparison to the standard electrochemical cell value of 2.38 × 10-6 cm2/s. By using the electrode chip in an optically transparent thin layer electrode (OTTLE), the spectroelectrochemical modulation of [Ru(bpy)3]2+ florescence was demonstrated, achieving a detection limit of 36 nM.

Authors:
 [1];  [2];  [1];  [3]; ORCiD logo [1]; ORCiD logo [2]
  1. Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221-0172, United States
  2. Pacific Northwest National Laboratory, Richland, Washington 99352, United States
  3. EIC Laboratories Inc., Norwood, Massachusetts 02062, United States
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1374640
Report Number(s):
PNNL-SA-121883
Journal ID: ISSN 0003-2700; 453060037
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Analytical Chemistry; Journal Volume: 89; Journal Issue: 14
Country of Publication:
United States
Language:
English
Subject:
Spectroelectrochemistry; fluorescence; Ag/AgCl; reference electrode; optically transparent thin layer electrode

Citation Formats

Branch, Shirmir D., Lines, Amanda M., Lynch, John, Bello, Job M., Heineman, William R., and Bryan, Samuel A. Optically Transparent Thin-Film Electrode Chip for Spectroelectrochemical Sensing. United States: N. p., 2017. Web. doi:10.1021/acs.analchem.7b00258.
Branch, Shirmir D., Lines, Amanda M., Lynch, John, Bello, Job M., Heineman, William R., & Bryan, Samuel A. Optically Transparent Thin-Film Electrode Chip for Spectroelectrochemical Sensing. United States. doi:10.1021/acs.analchem.7b00258.
Branch, Shirmir D., Lines, Amanda M., Lynch, John, Bello, Job M., Heineman, William R., and Bryan, Samuel A. Mon . "Optically Transparent Thin-Film Electrode Chip for Spectroelectrochemical Sensing". United States. doi:10.1021/acs.analchem.7b00258.
@article{osti_1374640,
title = {Optically Transparent Thin-Film Electrode Chip for Spectroelectrochemical Sensing},
author = {Branch, Shirmir D. and Lines, Amanda M. and Lynch, John and Bello, Job M. and Heineman, William R. and Bryan, Samuel A.},
abstractNote = {The electrochemical and spectroelectrochemical applications of an optically transparent thin film electrode chip are investigated. The working electrode is composed of indium tin oxide (ITO); the counter and quasi-reference electrodes are composed of platinum. The stability of the platinum quasi-reference electrode is modified by coating it with a planar, solid state Ag/AgCl layer. The Ag/AgCl reference is characterized with scanning electron microscopy and energy-dispersive X-ray spectroscopy. Open circuit potential measurements indicate that the potential of the planar Ag/AgCl electrode varies a maximum of 20 mV over four days. Cyclic voltammetry measurements show that the electrode chip is comparable to a standard electrochemical cell. Randles-Sevcik analysis of 10 mM K3[Fe(CN)6] in 0.1 M KCl using the electrode chip shows a diffusion coefficient of 1.59 × 10-6 cm2/s, in comparison to the standard electrochemical cell value of 2.38 × 10-6 cm2/s. By using the electrode chip in an optically transparent thin layer electrode (OTTLE), the spectroelectrochemical modulation of [Ru(bpy)3]2+ florescence was demonstrated, achieving a detection limit of 36 nM.},
doi = {10.1021/acs.analchem.7b00258},
journal = {Analytical Chemistry},
number = 14,
volume = 89,
place = {United States},
year = {Mon Jul 03 00:00:00 EDT 2017},
month = {Mon Jul 03 00:00:00 EDT 2017}
}