Diatoms in Photonics and Plasmonics: Characteristics and Applications

Persistent Link:
http://hdl.handle.net/10150/612401
Title:
Diatoms in Photonics and Plasmonics: Characteristics and Applications
Author:
Alvarez, Christine
Issue Date:
2016
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Embargo:
Release after 27-May-2017
Abstract:
We have investigated some of the many photonic and plasmonic properties of the diatom Coscinodiscus wailesii. We start by showing that when diatom frustules are converted to high-index magnesium silicide while maintaining their structure, they exhibit a broad (1μm - 2μm) photonic bandgap that varies in wavelength according to the position and angle of the incident light on the frustule. We then demonstrate the use of the micro and nanostructured silica diatom frustule as a low-cost, easily prepared substrate for surface-enhanced Raman spectroscopy by coating the frustule in 25 nm of silver and a monolayer of thiophenol. Some potential applications of diatoms to water quality measurements are suggested, and steps are taken to image a diatom frustule and chloroplasts simultaneously in vivo using rhodamine 19 dye and fluorescence microscopy. We propose future experiments that could ascertain whether there is any biological effect of the light filtering properties of the diatom frustule, and put forth some suggestions as to how to influence the morphology and photonic properties of the frustule via chemical contaminants in the diatom seawater growth medium.
Type:
text; Electronic Thesis
Keywords:
Diatom; Fluorescence microscopy; Photonic crystal; SERS; Surface enhanced Raman; Optical Sciences; Coscinodiscus wailesii
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Optical Sciences
Degree Grantor:
University of Arizona
Advisor:
Norwood, Robert A.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titleDiatoms in Photonics and Plasmonics: Characteristics and Applicationsen_US
dc.creatorAlvarez, Christineen
dc.contributor.authorAlvarez, Christineen
dc.date.issued2016-
dc.publisherThe University of Arizona.en
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en
dc.description.releaseRelease after 27-May-2017en
dc.description.abstractWe have investigated some of the many photonic and plasmonic properties of the diatom Coscinodiscus wailesii. We start by showing that when diatom frustules are converted to high-index magnesium silicide while maintaining their structure, they exhibit a broad (1μm - 2μm) photonic bandgap that varies in wavelength according to the position and angle of the incident light on the frustule. We then demonstrate the use of the micro and nanostructured silica diatom frustule as a low-cost, easily prepared substrate for surface-enhanced Raman spectroscopy by coating the frustule in 25 nm of silver and a monolayer of thiophenol. Some potential applications of diatoms to water quality measurements are suggested, and steps are taken to image a diatom frustule and chloroplasts simultaneously in vivo using rhodamine 19 dye and fluorescence microscopy. We propose future experiments that could ascertain whether there is any biological effect of the light filtering properties of the diatom frustule, and put forth some suggestions as to how to influence the morphology and photonic properties of the frustule via chemical contaminants in the diatom seawater growth medium.en
dc.typetexten
dc.typeElectronic Thesisen
dc.subjectDiatomen
dc.subjectFluorescence microscopyen
dc.subjectPhotonic crystalen
dc.subjectSERSen
dc.subjectSurface enhanced Ramanen
dc.subjectOptical Sciencesen
dc.subjectCoscinodiscus wailesiien
thesis.degree.nameM.S.en
thesis.degree.levelmastersen
thesis.degree.disciplineGraduate Collegeen
thesis.degree.disciplineOptical Sciencesen
thesis.degree.grantorUniversity of Arizonaen
dc.contributor.advisorNorwood, Robert A.en
dc.contributor.committeememberKieu, Khanhen
dc.contributor.committeememberPau, Stanleyen
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