Physicochemical properties of gold nanoparticle crystals

金纳米颗粒晶体的物理化学性质

• 批准号: 13440212
• 负责人: KIMURA Keisaku
• 金额: $ 9.54万
• 依托单位: Himeji Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13440212/
• 关键词: gold nanoparticle; particle crystal; self-assembling monolayer; reflectance spectrum; scanning tunneling microscopy; mercaptosuccinic acid; ナノ粒子; 表面修飾; 自己集積; コロイド; 超格子; gold nanoparticle; particle crystal; self-assembling monolayer; reflectance spectrum; scanning tunneling microscopy; mercaptosuccinic acid; ナノ粒子; 表面修飾; 自己集積; コロイド; 超格子

In due course of this project, we have studied the preparation of a nano-quantum crystal based upon self-assembling of surface modified gold nanoparticles, different from so-called particle crystal formation or the preparation of dense packing of nanoparticles, aiming the artificially designed quantum effect crystals. The results are classified as follows.1) Large scale synthesis of gold nanoparticles in water by colloidal chemistry technique.The scale of 0.1〜1g quantity was established by using mercaptosuccinic acid (MSA) as a surface modifier.2) High yield synthesis of gold nanoparticle crystals.Free standing crystallization at an air/water interface was developed based on DLVO theory.3) Optical absorption spectrum of nanoparticle crystals.We have observed a characteristic optical spectra in polycrystalline film of gold nanoparticle crystals, which differed from solution spectra typical of isolated particles or random packing of powdered samples. The broad surface plasmon band located at 520 nm observed in isolated particles was sharpened and shifted to lower energy side suggesting strong interparticle interaction likewise of exciton or J-band of cyanine dyes.4) STM observation of gold nanoparticle crystals.STM technique was applied to the particle crystal revealing that the surface of gold nanoparticles are densely covered with monolayer MSA.5) Structural evaluation of gold nanoparticle crystals.XRD and TED method are applied to a good crystal of gold nanoparticles revealing hcp densely packed structure.6) Chemical modification of surface modifier molecules.Esterification reaction was taken place against surface MSA molecules using pyridine carboxylic acid giving monolayer film of gold nanoparticles.

在适当的过程中，我们研究了基于表面改性金纳米颗粒的自组装的纳米量子晶体的制备，与所谓的颗粒晶体形成或制备了纳米颗粒的密集堆积，瞄准了人工设计的量子效应晶体。结果分类如下。1）通过胶体化学技术将金纳米颗粒大规模合成。使用辅助糖酸（MSA）作为表面修饰剂确定0.1-1g数量的量表。2）高屈服于金纳米晶体的高产同步。基于空气/水互动的金纳米晶体的水平。纳米颗粒晶体。我们观察到金纳米粒子晶体的多晶膜中的特征光谱，该光谱与典型的分离颗粒的溶液光谱或粉末状样品的随机堆积不同。在分离的颗粒中观察到的位于520 nm处的宽表等离激子条带锐化并转移到较低的能量方面，表明强烈的颗粒间相互作用同样具有令人兴奋的或J频段的氰氰染料。4）STM对金纳米颗粒晶体的观察。STM技术应用于粒子晶体，揭示了粒子构造的粒子表面，该表面是金纳米构成的。纳米颗粒晶体。XRD和TED方法被应用于露出HCP的良好金纳米颗粒的良好晶体，揭示了HCP无填充的结构。6）表面修饰剂分子的化学修饰。使用吡啶羧酸，提供金纳米颗粒的单层膜。