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

Goodwin, William Brandon

Title:

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