Investigation Of The Graphene Induced Shift In Surface Plasmon Resonance On Gold Film

Simple item page
dc.contributor.advisorBao, Jiming
dc.contributor.committeeMemberPei, Shin-Shem Steven
dc.contributor.committeeMemberEconomou, Demetre J.
dc.contributor.committeeMemberVerret, Douglas P.
dc.contributor.committeeMemberRuchhoeft, Paul
dc.contributor.committeeMemberShan, Xiaonan
dc.creatorAlam, Md Kamrul
dc.date.accessioned2018-11-30T17:57:30Z
dc.date.available2018-11-30T17:57:30Z
dc.date.createdMay 2018
dc.date.issued2018-05
dc.date.submittedMay 2018
dc.date.updated2018-11-30T17:57:30Z
dc.description.abstractWith the emergence of graphene and other two-dimensional (2D) nanomaterials, it was proposed that capping Au film with graphene could improve the performance of sensors based on its surface plasmon resonance (SPR) due to an increased local field and surface chemical adsorption. Such an atomically thin film enhanced SPR sensitivity has been further modeled and tested by many groups, but the SPR angle shift induced by 2D materials and its physics has been overlooked. In this work, we systematically investigated the graphene induced SPR shifts by comparing experimental results with that of models. Experimentally, a large SPR shift of ~0.30° is observed, and it is three times larger than that from conventional modeling. Graphene surface roughness and cleanliness can contribute to the shift in SPR resonance angle. Therefore, we develop a polymer free graphene transfer technique to have a contamination free surface. After discussing the deficiencies of this oversimplified model, which treats both graphene and Au films as continuous and smooth isotropic media, we show steps to build more realistic models and evaluate the effect on SPR from surface morphologies of Au and graphene films. Three models: Finite Difference Time Domain (FDTD), Effective Medium Theory (EMT), and Averaged Index Method (AIM) are used to estimate the shift based on the actual surface morphology obtained with atomic force microscopy (AFM) images. The effect of the anisotropic dielectric constant of graphene and the charge transfer between graphene and Au films are also investigated. This study illustrates the challenges in understanding the SPR of noble metal films modified by atomic scale 2D materials and calls for more advanced and realistic modeling in broad applications involving metal film and 2D materials.
dc.description.departmentChemical and Biomolecular Engineering, Department of
dc.format.digitalOriginborn digital
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/10657/3491
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectSurface Plasmon Resonance
dc.subjectGold Film
dc.subjectGraphene
dc.subjectRefractive Index
dc.subjectPolymer Free Graphene Transfer
dc.subject2D Materials
dc.subjectFDTD
dc.subjectEffective medium theory
dc.titleInvestigation Of The Graphene Induced Shift In Surface Plasmon Resonance On Gold Film
dc.type.dcmiText
dc.type.genreThesis
local.embargo.lift2020-05-01
local.embargo.terms2020-05-01
thesis.degree.collegeCullen College of Engineering
thesis.degree.departmentChemical and Biomolecular Engineering, Department of
thesis.degree.disciplineMaterials Engineering
thesis.degree.grantorUniversity of Houston
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy

Files

Original bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
ALAM-DISSERTATION-2018.pdf
Size:
6.96 MB
Format:
Adobe Portable Document Format
Download

License bundle

Now showing 1 - 2 of 2
No Thumbnail Available
Name:
PROQUEST_LICENSE.txt
Size:
4.42 KB
Format:
Plain Text
Description:
Download
No Thumbnail Available
Name:
LICENSE.txt
Size:
1.81 KB
Format:
Plain Text
Description:
Download

Collections

Published ETD Collection