dc.contributor.advisor | MacKinnon, Craig | |
dc.contributor.author | Kelly, Kaitlyn T. | |
dc.date.accessioned | 2015-06-15T20:20:22Z | |
dc.date.available | 2015-06-15T20:20:22Z | |
dc.date.created | 2015 | |
dc.date.issued | 2015-06-15 | |
dc.identifier.uri | http://knowledgecommons.lakeheadu.ca/handle/2453/638 | |
dc.description.abstract | Presented herein is the organic synthesis and thin film (TF) assembly of six alkyl-substituted
thiocyante and selenocyante bithiophene molecules: NCSe-T2-Hx, NCS-T2-Hx, NCS-Hx-T2-Hx, NCSe-
Hx-T2-Hx, NCS-Hx-T2-Hx-SCN and NCSe-Hx-T2-Hx-SeCN. TFs assembled from these thio and
selenocyanates were characterized by six different techniques: electrochemical capacitance (Cp)
measurements, scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDX),
atomic force microscopy (AFM), x-ray photoelectron spectroscopy (XPS) and time-of-flight secondary
ion mass spectrometry (ToF-SIMS). Cp experiments were used to confirm the development of TFs on an
amorphous Au surface using ethanol or hexanes as a reaction solvent. A sputtered Au surface was
observed by SEM/EDX to be an inappropriate surface for TF assembly. TFs assembled onto epitaxially
grown Au were characterized by multiple techniques. Large crystallites were observed on TFs assembled
from NCSe-T2-Hx and NCSe-Hx-T2-Hx-SeCN. Chemical maps of these crystallites were obtained
through SEM/EDX. The presence of a covalent Au-S or Au-Se bond on the surface was confirmed by
XPS signals from the S 2p3/2 and Se 3d5/2/3d3/2 regions respectively. XPS signals of ~ 399 eV in the N 1s
region were observed in all assemblies characterized by this technique, indicating the presence of residual
gold-bound cyanide (Au(CN)ads) on the surface. ToF-SIMs chemical intensity maps confirmed the
presence of expected TF fragments on the surface of all TFs characterized by this technique. ToF-SIMS
results suggested that TFs connected to the Au surface through an aromatically bound S or Se atom
produced TFs with higher surface coverage. | en_US |
dc.language.iso | en_US | en_US |
dc.subject | Thiolate thin film | en_US |
dc.subject | Development of thiocyanate precursors | en_US |
dc.subject | Surface analysis techniques | en_US |
dc.subject | Atomic force microscopy (AFM) | en_US |
dc.subject | Scanning electron microscopy and energy dispersive microscopy (SEM/EDX) | en_US |
dc.subject | X-ray photoelectron spectroscopy (XPS) | en_US |
dc.subject | Time-of-flight secondary ion mass spectrometry (ToF-SIMS) | en_US |
dc.title | Self-assembled thin films of thiocyanate and selenocyanate bithiophenes | en_US |
dc.type | Thesis | en_US |
etd.degree.name | M.Sc. | en_US |
etd.degree.level | Master | en_US |
etd.degree.discipline | Chemistry | en_US |
etd.degree.grantor | Lakehead University | en_US |
dc.contributor.committeemember | Chen, Aicheng | |
dc.contributor.committeemember | Gottardo, Christine | |
dc.contributor.committeemember | Ylijoki, Kai | |