dc.contributor.authorTao, Chen
dc.identifier.citationTao, C. (2010). Gold nanoparticle based anisotropic nanocomposites : fabrication, assembly and application. Doctoral thesis, Nanyang Technological University, Singapore.
dc.description.abstractThis thesis deals mainly with colloidal anisotropic nanostructures composed of Au nanoparticle and polymer. In the nanocomposites, one side of the Au nanoparticle was encapsulated by polymer; the other side was functionalized with hybrophilic molecule, generating Janus-like morphology. Ligand segregation on the Au surface dictated the polymer attachment. By controlling the ligand competition under the assistance of polymer attachment, a standard route to localize analytes on specific sites of anisotropic nanostuctures, such as the ends or sides of gold nanorods, was developed. This type of ligand assignment enabled us to record the surface-enhanced Raman scattering from specific areas of Au nanorods. In addition, nanoparticle dimers and linear chains of the nanocomposites were obtained by salt induced aggregation. The controllable organization of anisotropic nanocomposites allows the creation of uniform hot spots to investigate the surface-enhanced Raman scattering fingerprint variations. As a step further to anisotropic Au nanoparticle and polymer, the ligand competition methodology was extended to the investigation of Janus Au-SiO2 and ternary Ag-Au-SiO2 nanostuctures.en_US
dc.format.extent188 p.en_US
dc.subjectDRNTU::Engineering::Materials::Nanostructured materialsen_US
dc.titleGold nanoparticle based anisotropic nanocomposites : fabrication, assembly and applicationen_US
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.contributor.supervisorChen Hongyuen_US
dc.description.degreeDOCTOR OF PHILOSOPHY (SPMS)en_US

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