Purpose
- To determine if coating the glassy carbon electrode with nanofibers blocked electron transfer.
Protocol
Electrochemical Analysis
- CH Instruments Electrochemical Analyzer was used.
- 5 mM hexaammineruthenium(III) chloride and 1M KCl solution was used in electrochemical cell.
- The glassy carbon electrode was cleaned with 0.3 and then 0.05 alumina slurry and then sonicated.
- The reference electrode, the platinum wire, and the GCE were attached to the instrument.
- The parameters were set at:
- Initial: 0.2
- High: 0.2
- Low: -0.4
- Initial Scan: Negative
- Scan Rate: 0.05
- Segments: 4
- Sensitivity 1x10^(-5)
- Sample Interval: 0.001
- Then the instrument was ran.
- This same procedure was with the addition of 15μL or 20μL of nanofibers which had been dropped onto the GCE and allowed to dry.
- The nanofibers had been centrifued at 1300rpm for 1 minute.
- 15uL nanofibers take about 40 minutes to dry
Nanofiber drying
- The fibers were combined in a Petri dish to increase the available drying surface area and let rest overnight.
Data
- 1M KCl; 15μL Nanofibers; Test 2
Figure 1 dV=.082V dC=8.03*10-5A
- 1M KCl; 15μL Nanofibers; Test 3
Figure 2 dV=.083V dC=7.75*10-5A
- 1M KCl; 20μL Nanofibers; Test 1
Figure 3 dV=.092V dC=7.75*10-5A
- 1M KCl; 20μL Nanofibers; Test 2
Figure 4 dV cannot be determined dC=9.92*10-5A
Results
Notes
Cassidy Hart
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Project name
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