User:Hannah Harvey/Notebook/CHEM-471 Fall 2016/2017/02/14

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  • To determine if coating the glassy carbon electrode with nanofibers blocked electron transfer.
    • 15 μL
    • 20 μL


Electrochemical Analysis

  • CH Instruments Electrochemical Analyzer was used.
  1. 5 mM hexaammineruthenium(III) chloride and 1M KCl solution was used in electrochemical cell.
  2. The glassy carbon electrode was cleaned with 0.3 and then 0.05 alumina slurry and then sonicated.
  3. The reference electrode, the platinum wire, and the GCE were attached to the instrument.
  4. 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
  1. Then the instrument was ran.
  2. This same procedure was with the addition of 15μL or 20μL of nanofibers which had been dropped onto the GCE and allowed to dry.
  3. 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.


  • 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



Cassidy Hart