Controlled modulation of short- and long-range adhesion of microscale biogenic replicas

dc.contributor.advisor Sandhage, Kenneth H.
dc.contributor.author Goodwin, William Brandon
dc.contributor.committeeMember Liu, Meilin
dc.contributor.committeeMember Summers, Christopher
dc.contributor.committeeMember Zhang, Z. J.
dc.contributor.committeeMember Meredith, James C.
dc.contributor.department Materials Science and Engineering
dc.date.accessioned 2016-05-27T13:09:04Z
dc.date.available 2016-05-27T13:09:04Z
dc.date.created 2015-05
dc.date.issued 2015-01-12
dc.date.submitted May 2015
dc.date.updated 2016-05-27T13:09:04Z
dc.description.abstract The generation of nanostructured microscale assemblies with complex, three-dimensional (3-D) morphologies possessing multicomponent inorganic compositions tailored for adhesion is of considerable scientific and technological interest. This dissertation demonstrates that self-assembled 3-D organic templates of biogenic origin can be converted into replicas comprised of numerous other functional nanocrystalline inorganic materials and, further, how such replicas can tailored for adhesion. Nature provides a spectacular variety of biologically-assembled 3-D organic structures with intricate, hierarchical (macro-to-micro-to-nanoscale) morphologies designed for particle adhesion. The conformal coating of such structurally-complex biotemplates with synthetic materials provides a framework for chemical transformation of other, complex synthetic organic templates and the basis to study imparted adhesion properties. Three specific research thrusts are detailed in this document. First, freestanding magnetite (Fe3O4) replicas of bio-organic templates are synthesized via a layer-by-layer (LbL) wet chemical deposition process and subsequent morphology-preserving thermal treatments to allow for structures with tailorable long-range magnetic adhesion. Second, freestanding spinel ferrite replicas of bio-organic templates are synthesized (via LbL coating and thermal treatment) for grain size controlled long-range magnetic adhesion and short range van der Waals adhesion. The final research thrust focuses on the use of a low temperature (≤ 250°C) wet-chemical based process to convert bioorganic templates into magnetically-coated structures retaining both the size and morphology of the template. The rate-limiting kinetic mechanism(s) of the partial reduction of the inorganic coatings have been examined via quartz crystal microbalance analysis. The effects of the coating micro/nanostructure on magnetic behavior and on surface adhesion, have been investigated.
dc.description.degree Ph.D.
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/54842
dc.language.iso en_US
dc.publisher Georgia Institute of Technology
dc.subject Pollen
dc.subject Surface sol-gel
dc.subject Three-dimensional replicas
dc.subject Magnetic oxides
dc.subject Van der Waals
dc.subject Adhesion
dc.subject Kinetics
dc.title Controlled modulation of short- and long-range adhesion of microscale biogenic replicas
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.corporatename School of Materials Science and Engineering
local.contributor.corporatename College of Engineering
relation.isOrgUnitOfPublication 21b5a45b-0b8a-4b69-a36b-6556f8426a35
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
thesis.degree.level Doctoral
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