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dc.contributor.authorXu, Yangen_US
dc.date.accessioned2014-03-14T20:19:55Z
dc.date.available2014-03-14T20:19:55Z
dc.date.issued2005-12-02en_US
dc.identifier.otheretd-12072005-112723en_US
dc.identifier.urihttp://hdl.handle.net/10919/29974
dc.description.abstractA great deal of interest has been dawn on the colloidal chemistry based semiconductor nanocrysallites, also known as quantum dots (QDs). Because of the strong quantum confinement, quantum dots have unique size-dependent optical properties, which are much more superior to the conventional organic fluorescence materials. In addition, strong chemical resistant makes inorganic semiconductor QDs ideal candidate for next-generation of bio-labels and drug delivery vehicles. This report presents a user friendly approach to synthesize high quality biocompatible CdSe QDs in aqueous solution. Size of the dots can be controlled by adjusting the temperature, pH of the solution, and ratio of the precursors. A thin CdS layer was grown on CdSe QDs, forming a CdSe/CdS core/shell structure, to improve the photoluminescence. In order to use these QDs in-vivo, a more chemically robust coating, silica, was grown on the core/shell structure QD. The optical properties of the QDs were characterized by absorption and photoluminescence spectra. X-ray diffraction and transmission electron microscopy were conducted to verify the QDs composition and structure.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartDissertation.pdfen_US
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectCdSen_US
dc.subjectSilicaen_US
dc.subjectsemiconductor nanocrystalen_US
dc.subjectquantum dotsen_US
dc.subjectCdSeen_US
dc.titleSynthesis and Characterization of Silica Coated CdSe/CdS Core/Shell Quantum Dotsen_US
dc.typeDissertationen_US
dc.contributor.departmentElectrical and Computer Engineeringen_US
dc.description.degreePh. D.en_US
thesis.degree.namePh. D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineElectrical and Computer Engineeringen_US
dc.contributor.committeechairMeehan, Kathleenen_US
dc.contributor.committeememberGuido, Louis J.en_US
dc.contributor.committeememberLu, Guo-Quanen_US
dc.contributor.committeememberWyatt, Christopher L.en_US
dc.contributor.committeememberLove, Nancy C.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-12072005-112723/en_US
dc.date.sdate2005-12-07en_US
dc.date.rdate2005-12-14
dc.date.adate2005-12-14en_US


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