dc.contributor.advisor | Rosenberger, Albert T. | |
dc.contributor.author | Deepak, Ganta | |
dc.date.accessioned | 2013-11-26T08:26:32Z | |
dc.date.available | 2013-11-26T08:26:32Z | |
dc.date.issued | 2010-05 | |
dc.identifier.uri | https://hdl.handle.net/11244/6889 | |
dc.description.abstract | Scope and Method of Study: | |
dc.description.abstract | The purpose of this study is to explore the surface effects of high-quality-factor optical microsphere resonators and thin-film-coated microresonators in various ambient gases. In this work, we present a systematic study of the assembly and characterization of gold nanostructures. We employ a wet-chemical synthesis method for growing gold nanorods and a directed electrochemical method for assembly of gold nanowires. The adhesion methods of gold nanostructures on high-quality-factor optical microsphere resonators are also investigated. | |
dc.description.abstract | Findings and Conclusions: | |
dc.description.abstract | A novel method is employed for measuring thermal accommodation coefficients of various gases like nitrogen, helium and ambient air on several coated and uncoated surfaces of fused-silica microresonators, operating at room temperature. This method is further extended to measure the absorption coefficient of a surface film or water layer on a fused-silica microresonator, and provides a novel method to find the water layer desorption and adsorption rates on the surface of a microresonator in the presence of gases like ambient air and nitrogen. We have adapted methods for growing gold nanorods of different aspect ratios (AR), and developed a novel method of growing high-AR (20-400) gold nanowires from low-AR gold nanorods. Various methods were discovered to coat these gold nanostructures and carbon nanotubes on the fused-silica surface. The most successful method involves surface modification with MPMDMS (i.e., silanization) before coating with gold nanorods. These coating methods have made microresonators useful for plasmonic sensing applications. | |
dc.format | application/pdf | |
dc.language | en_US | |
dc.rights | Copyright is held by the author who has granted the Oklahoma State University Library the non-exclusive right to share this material in its institutional repository. Contact Digital Library Services at lib-dls@okstate.edu or 405-744-9161 for the permission policy on the use, reproduction or distribution of this material. | |
dc.title | Surface effects and gold-nanostructure surface coating of whispering-gallery microresonators | |
dc.contributor.committeeMember | Bandy, Donna K. | |
dc.contributor.committeeMember | Zhang, Weili | |
dc.contributor.committeeMember | Summy, Gil | |
osu.filename | Ganta_okstate_0664D_10786.pdf | |
osu.accesstype | Open Access | |
dc.type.genre | Dissertation | |
dc.type.material | Text | |
thesis.degree.discipline | Photonics | |
thesis.degree.grantor | Oklahoma State University | |