Gold nanorods: Synthesis, structural manipulation, and self -assembly

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dc.contributor.advisorZubarev, Eugene R.
dc.creatorKhanal, Bishnu Prasad
dc.date.accessioned2018-12-03T18:33:30Z
dc.date.available2018-12-03T18:33:30Z
dc.date.issued2009
dc.description.abstractThis work describes methods for the synthesis, structural manipulation, and self-assembly of one-dimensional gold nanostructures. The thesis begins with an efficient technique for the synthesis and separation of gold nanorods from a complex mixture, which has been a long standing challenge in the field of inorganic nanocrystals. The key aspect of our approach is the combination of partial oxidative dissolution and gravitational sedimentation of gold nanostructures. In addition, the length of nanorods can be tuned using reversible elongation and shortening of rods when Au (I) and Au (III) ions are used, respectively. The synthesis of extremely long gold nanowires measuring up to ∼25 µm was accomplished by this novel synthetic approach. The width of gold nanowires can also be precisely controlled by adjusting the concentration of Au (I) ions in the growth solution. This thesis also describes a procedure for the large scale synthesis of gold nanorods. The gram quantity of nearly monodisperse single crystalline nanorods was synthesized by slow reduction of Au (I) ions on the surface of pre-formed gold nanorods. This results in the amplification of nanorods without the formation of any undesirable shapes. Finally, the surface functionalization technique described in this thesis allows for the synthesis of polymer-functionalized gold nanorods. Our investigation revealed their unique ability to undergo spontaneous self-organization into ring-like superstructures. This process is templated by water microdroplets which condense from the air when a volatile organic solvent evaporates. This self-assembly does not require any lithographic technique and can organize millions of gold nanorods into rings in a matter of seconds.
dc.format.extent149 pp
dc.identifier.callnoTHESIS CHEM. 2010 KHANAL
dc.identifier.citationKhanal, Bishnu Prasad. "Gold nanorods: Synthesis, structural manipulation, and self -assembly." (2009) Diss., Rice University. <a href="https://hdl.handle.net/1911/103752">https://hdl.handle.net/1911/103752</a>.
dc.identifier.digital765287017
dc.identifier.urihttps://hdl.handle.net/1911/103752
dc.language.isoeng
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.
dc.subjectElectrical engineering
dc.subjectCondensed matter physics
dc.subjectApplied sciences
dc.subjectPure sciences
dc.subjectGold nanorods
dc.subjectSelf-assembly
dc.subjectStructural manipulation
dc.subjectSurface functionalization
dc.titleGold nanorods: Synthesis, structural manipulation, and self -assembly
dc.typeThesis
dc.type.materialText
thesis.degree.departmentChemistry
thesis.degree.disciplineNatural Sciences
thesis.degree.grantorRice University
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy
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