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Nanoparticles Self-assembly and the Applications in Electroanalysis

Author: LiJianChun
Tutor: LiYongJun；HeYan
School: Hunan University
Course: Analytical Chemistry
Keywords: Silanized Self-assembly Contact angle Gold film Enzyme electrode
CLC: TB383.1
Type: Master's thesis
Year: 2009
Downloads: 62
Quote: 0
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Abstract


The late 1980s, nanomaterials research rapid rise to become an emerging interdisciplinary nanoscience. The nanomaterials are constituted by 1 1 00 nm particulate material. Wide scale in the area of ??the transfer of the clusters and macroscopic objects, and thus has a surface effect, small size effect, quantum size effect and quantum tunneling effect it in the field of optical, mechanical, magnetic, electrical, thermal, etc. Application. Nanomaterials and self-assembly technology in the past ten years has been a great development. The nanoscience research focused on the growth mechanism of the study as well as the evaluation of the performance of nanoparticles. Based on the current stage of development of nanoscience, this thesis reads as follows: (1) the the different wettability base Preparation and SiO 2 nanoparticles observed in the self-assembly process of the substrate surface. In the study of optical microscopy imaging, the coverslip important carrier of substrate surface wetting characteristics have a great impact on the substrate imaging research, study substrate in the solution, this effect is more significant. Modification of the different functional groups on the surface of glass substrate that can be prepared by different wettability. Nano-particle sol droplets are different in the different wettability of the surface of the substrate during the evaporation process, generated colloidal crystal morphology is very different. Academia nanoparticles little is known about the law of motion of the droplet, we prepared different wettability of the glass substrate, by a charge-coupled device (CCD) and the differential interference contrast (DIC) microscope systems used in connection of nano real-time in situ observation of motion of particles in small droplets, the 200 nm SiO 2 nanoparticles in different substrate wettability movement trends, for further study of the nanoparticles self-assembled dynamics process to provide help. (2) using the liquid / liquid interface of ethanol-induced self-assembly method to prepare nano-thin film of gold nanoparticles of different size, and study the impact of NADH electrocatalytic properties, the nanofilm prepared for NADH better electrical catalytic ability, when the increase in the surface area of ??the gold nanoparticle films, the increase in catalytic sites, help to improve its catalytic activity. (3) Preparation of gold nanoparticle multilayer film substrate and the electro-catalytic activity of catalase (HRP) on the horseradish. Ethanol-induced interfacial self-assembled nano-monolayer films and multilayers assembled gold nanoparticles by layer transfer technology layers, the layers of hydrophobic and electro-catalytic activity with the gold monolayer increases, when 5,6 layer is reached, the catalytic performance reaches a maximum, but more than 6 layers, electrical catalytic ability but declined.

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CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
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