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Spectroelectrochemical sensing provides three simultaneous modes of enhanced selectivity: chemically selective films, spectroscopy, and electrochemistry. Chemically selective sol-gels films are particularly useful in applications demanding optical transparency. Sol-gels have traditionally been deposited by means of spin or dip coating, limiting their spatial resolution. This work utilizes indium-tin oxide optically transparent electrodes for electrochemical deposition of sol-gel films. Functionalization can be tailored for chemical selectivity and is deposited locally where potential is applied to catalyze sol-gel formation. The system studied in this work provides tri-modal selectivity by means of charge exclusion, electrochemical activity, and/or optical properties of Ru(bpy)32+. Deposition parameters were optimized for precursor concentration and film thickness. A flow cell system was designed to test the diffusive effects of Ru(bpy)32+ and for simultaneous collection of electrochemical and optical data. Spectroelectrochemical sensing can be applied for the indirect detection of trace Cr6+.


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  • Event location
    • Special Collections

  • Event date
    • 2 April 2013

  • Date submitted

    18 July 2022

  • Additional information
    • Acknowledgements:

      Royce Dansby-Sparks