User:Cassidy B. Hart/Notebook/CHEM-471: Gold & Silver Nanoparticles/2017/02/13

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Purpose To determine if coating the glassy carbon electrode with nanofibers blocked electron transfer. To begin the drying process of nanofibers to test alternate methods for electrochemical analysis on 02/14/2017 To re-run .1M KCl data after initial data import into Excel was faulty 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 repeated twice before being repeated a third time with the addition of 15uL 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 Test; No nanofibers Figure 1 dV=0.123V dC=8.10*10-5A 1M KCl; 15μL Nanofibers; Test 1 Figure 2 dV=0.080V dC=9.54*10-5A Results .1M KCl data fixed and uploaded to 02/07/2017 as well. Notes Hannah Harvey