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DC Field | Value | Language |
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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 | - |
Appears in Collections: | Electronic Theses and Dissertations from 2009 |
Files in This Item:
File | Description | Size | Format | |
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KellyK2015m-1b.pdf | 3.12 MB | Adobe PDF | ![]() View/Open |
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