Crystal Engineering of Anisotropic Gold Nanoparticles through Modulation of Seed Size and Crystal Structure

Zeliha Cansu Canbek 1
1 LIONS - Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
Abstract : Between the ongoing research on various type of nanomaterials to tune the particle sizeand crystal design in nanoscale for their potential applications, anisotropic gold nanoparticleshas attracted the most intention not only because of their divine color but also their enhancedcatalytic activities, optical properties and electrical conductivities. Event though, many effortshave been already made in the field of synthesis of anisotropic gold nanoparticles, withdefined sizes and structures, growth mechanism of many unique anisotropic shapes is still acontroversial subject.Overall objective of this thesis is to understand the origin of anisotropy during theformation of anisotropic gold nanoparticles, especially gold nanorods, in liquid phase. For ourenvisaged aim, between numerous synthetic methods developed for production ofnanoparticles, seed mediated approach is chosen for the fabrication of final anisotropic goldnanoparticles from small seeds which is grown into final nanoparticle later on. During thesynthesis of nanoparticles, those seeds play critical role as precursors to control the yield ofand the crystal structure of final anisotropic nanoparticle. Here we offer a systematical studyon the origin of anisotropy with respect to “seed size” and “crystal morphology”. Since thesesmall particles are the genesis of anisotropic metal nanoparticle synthesis, in this thesis weanswer following questions to explain the origin of anisotropy;i. How to control the crystal structure and the size of the seeds?ii. What are the influences of controlled seed size and structure on the kinetics ofnanoparticle growth?
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Zeliha Cansu Canbek. Crystal Engineering of Anisotropic Gold Nanoparticles through Modulation of Seed Size and Crystal Structure. Theoretical and/or physical chemistry. Université de Versailles-Saint Quentin en Yvelines, 2014. English. ⟨NNT : 2014VERS0052⟩. ⟨tel-01231223⟩

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