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dc.contributor.advisor Natelson, Douglas
dc.creatorWang, Xifan
dc.date.accessioned 2020-10-19T15:14:38Z
dc.date.available 2021-02-01T06:01:14Z
dc.date.created 2020-08
dc.date.issued 2020-10-15
dc.date.submitted August 2020
dc.identifier.citation Wang, Xifan. "Photothermoelectric Effects in Gold Nanostructures." (2020) Diss., Rice University. https://hdl.handle.net/1911/109431.
dc.identifier.urihttps://hdl.handle.net/1911/109431
dc.description.abstract Nanostructures in noble metals(e.g Au,Ag) provide unique properties for emergingapplications. One of the most important and interesting properties is the plasmonicresponse, where the electron gas in the metal can couple with electromagnetic radia-tion of wavelengths that are far larger than the nanostructure size. As a result, thelocal electric field can be significantly enhanced. Due to this property, the nanostruc-tured metal device can be locally heated by an incident light, and cause electrons totravel through the device. By measuring the electronic transport and open circuitvoltage, the characteristics of this photothermoelectric effects can be well studied. Ifone can raster-scan the laser and probe the response of the device as a function ofthe laser position, the variation of photothermoelectric response along the nanostruc-tured device can be collected. In this dissertation, I mainly focused on the study ofphotothermoelectric effects in the gold nanowire. We observed that the photother-moelectric response varies when scanning across the gold nanowire with a focusedlaser beam. Such a phenomena can be possible caused by local Seebeck coefficientvariation. After annealing the device with relatively low temperature (200◦C), theoverall intensity of PTE response is significantly reduced. This result indicates that a major contribution to the local Seebeck coefficient is residual strain along the device.Moreover, we modified the surface of the gold nanowire with different methods and successfully ruled out some other factors, which can potentially cause this phenomena.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectPhotothermoelectric effects
Gold nanostructure
Plasmonic
dc.title Photothermoelectric Effects in Gold Nanostructures
dc.type Thesis
dc.date.updated 2020-10-19T15:14:39Z
dc.type.material Text
thesis.degree.department Materials Science and NanoEngineering
thesis.degree.discipline Engineering
thesis.degree.grantor Rice University
thesis.degree.level Doctoral
thesis.degree.name Doctor of Philosophy
dc.embargo.terms 2021-02-01


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