Title

The Electrochemical Deposition of Sol-Gels for Spectroelectrochemical Sensing

Faculty Mentor(s)

Royce Dansby-Sparks

Location

Special Collections

Start Date

2-4-2013 12:30 PM

End Date

2-4-2013 1:45 PM

Description/Abstract

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+.

This document is currently not available here.

Share

COinS
 
Apr 2nd, 12:30 PM Apr 2nd, 1:45 PM

The Electrochemical Deposition of Sol-Gels for Spectroelectrochemical Sensing

Special Collections

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+.