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The Research of the Assembly of Amphiphilic Nanoparticles in the Solvent and Phase Interface

Author: ChenCheng
Tutor: YangYaJiang
School: Huazhong University of Science and Technology
Course: Chemical Engineering
Keywords: Nanostructures Self-assembly Amphiphilic Gold nanoparticles Janus particle
CLC: O614.123
Type: Master's thesis
Year: 2013
Downloads: 13
Quote: 0
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Abstract


In this thesis, we describe the synthesis of different sizes and different surfactantsprotected gold nanoparticles (AuNPs). We prepared amphiphilic AuNPs which wereprotected by polystyrene and polyethylene glycol polymer brushes through one-step andtwo-step “grafting to” reaction.This thesis studied the self-assembly of the amphiphilic AuNPs into one-dimensional(1D), two-dimensional (2D) and there-dimensional (3D) nanostructures using precipitationmethod. We described a general methodology for the solvent-induced self-assembly ofAuNPs into3D clusters with well-controlled sizes. The structures of the clusters werecharacterized by ultraviolet and visible spectrophotometer (UV-Vis) and transmissionelectron microscopy (TEM) as well as field emission scanning electron microscopy(FSEM).We prepared a Janus polymer particles by polystyrene (PS) and polymethylmethacrylate (PMMA) through emulsion of the solution and studied the self-assembly ofthe amphiphilic AuNPs in the interface of the Janus polymer particle. Amphiphilic AuNPswith short PS chains loaded on the whole polymer particles, both on the PS domain andPMMA domain. Amphiphilic AuNPs were loaded in to the PS domain by increasing thechains of PS ligand grafted on AuNPs. The location of where amphiphilic AuNPs wereloaded changed from the surface to the inside of the Janus polymer particle by increasingthe chains of PS ligand grafted on AuNPs.

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CLC: > Mathematical sciences and chemical > Chemistry > Inorganic Chemistry > Metal elements and their compounds > Part Ⅰ family metal elements and their compounds > The copper Vice family (IB group metal elements ) > Gold Au
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