Correlated electron microscopy with electro-optical imaging of hexagonal tungsten oxide nanorods
| dc.contributor.author | Cashen, Christina J., author | |
| dc.contributor.author | Sambur, Justin B., advisor | |
| dc.contributor.author | Prieto, Amy, committee member | |
| dc.contributor.author | Li, Yan Vivian, committee member | |
| dc.date.accessioned | 2019-09-10T14:36:15Z | |
| dc.date.available | 2019-09-10T14:36:15Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | Fundamental understanding of the dynamics of ion insertion into a host material are essential to accommodate the rising demand for energy storage technology. It has been established that single nanoparticle electrodes greatly improve the kinetics of the ion insertion reaction, however the heterogeneous behavior of single particles correlated to the structure of the particle has been challenging to determine. This work takes on this challenge by developing a method that implements optical microscopy to study the optical modulations of electrochromic single particle hexagonal tungsten oxide (h-WO3) nanorods with transmission electron microscopy (TEM). Heightened resolution provided by TEM reveals sub-atomic structural details which would be impossible to observe with other techniques. This work introduces a method of measuring correlated single particle optical activity of WO3 with TEM resolution images of the same particle. This study found heterogeneous optical modulations of the carbon film considerably influenced the optical activity of WO3. Bearing in mind this behavior is vital for future experiments using this method. After this is accounted, we compare the optical activity of two single particles using the common parameters: maximum optical density (max OD) and the time it takes to reach 90% of the max OD (t90). This comparison provides further evidence that the presence of nanosized step-edge gradients contribute to the ion insertion dynamics of this electrochromic host material. Further study using this method can reveal a understanding of how the presence of step-edges contributes to the local lattice dynamics upon lithiation of a nanorod. | |
| dc.format.medium | born digital | |
| dc.format.medium | masters theses | |
| dc.identifier | Cashen_colostate_0053N_15613.pdf | |
| dc.identifier.uri | https://hdl.handle.net/10217/197384 | |
| dc.language | English | |
| dc.language.iso | eng | |
| dc.publisher | Colorado State University. Libraries | |
| dc.relation.ispartof | 2000-2019 | |
| dc.rights | Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. | |
| dc.title | Correlated electron microscopy with electro-optical imaging of hexagonal tungsten oxide nanorods | |
| dc.type | Text | |
| dcterms.rights.dpla | This Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). | |
| thesis.degree.discipline | Chemistry | |
| thesis.degree.grantor | Colorado State University | |
| thesis.degree.level | Masters | |
| thesis.degree.name | Master of Science (M.S.) |
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