Dynamics of Magnetically Actuated Colloidal Crystals under Rotating Magnetic Fields

Simple item page
dc.contributor.advisorBiswal, Sibani Lisaen_US
dc.creatorLobmeyer, Dana Men_US
dc.date.accessioned2024-05-20T19:53:23Zen_US
dc.date.created2024-05en_US
dc.date.issued2024-03-07en_US
dc.date.submittedMay 2024en_US
dc.date.updated2024-05-20T19:53:23Zen_US
dc.descriptionEMBARGO NOTE: This item is embargoed until 2024-11-01en_US
dc.description.abstractPrecise control at the colloidal scale is one of the most promising bottom-up approaches to fabricating new materials and/or devices with tunable and/or precisely engineered properties. Magnetic colloidal assembly offers great versatility because of the ability to externally tune particle-particle interactions and to construct a host of particle arrangements. Such a variety of structures has led magnetic colloidal assembly to also be used as experimental models, gaining insights into atomic and molecular systems. Rotating magnetic fields have particularly gained attraction in this space for their ability to create two-dimensional (2-D) colloidal crystals and tune their phase behavior through the strength of the magnetic field. However, many open questions regarding the rotational dynamics in these 2-D systems still remain open. In this thesis, field-induced particle circulation at the edge of superparamagnetic colloidal crystals is utilized for shear-induced grain boundary studies in polycrystalline materials. The underlying mechanisms of these edge flows are further investigated in sheets and clusters to fundamentally understand them and explain cluster rotation. Furthermore, the edge flows are described as a result of individual particle rotation despite the use of superparamagnetic particles. Since such particles should in theory not rotate, the magnetic relaxation time of the particles is measured and harnessed to highlight these non-ideal effects and their capability in creating previously inaccessible structures and dynamics. By discovering, measuring and harnessing a parameter previously neglected, this thesis expands the capabilities of magnetic colloidal assembly and opens the door to further expansion into novel applications.en_US
dc.embargo.lift2024-11-01en_US
dc.embargo.terms2024-11-01en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationLobmeyer, Dana. Dynamics of Magnetically Actuated Colloidal Crystals under Rotating Magnetic Fields. (2024). PhD diss., Rice University. https://hdl.handle.net/1911/115913en_US
dc.identifier.urihttps://hdl.handle.net/1911/115913en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectcolloidalen_US
dc.subjectmagnetic fieldsen_US
dc.subjectcrystalsen_US
dc.titleDynamics of Magnetically Actuated Colloidal Crystals under Rotating Magnetic Fieldsen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentChemical and Biomolecular Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
LOBMEYER-DOCUMENT-2024.pdf
Size:
110.53 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 2 of 2
No Thumbnail Available
Name:
PROQUEST_LICENSE.txt
Size:
5.84 KB
Format:
Plain Text
Description:
Download
No Thumbnail Available
Name:
LICENSE.txt
Size:
2.98 KB
Format:
Plain Text
Description:
Download
Collections
Rice University Theses and Dissertations