Liquid-Crystalline Organic-Inorganic Hybrid Superlattice: Development of Light-Controllable Metamaterials

液晶有机-无机杂化超晶格：光控超材料的发展

基本信息

批准号：
22685019
负责人：
KANIE Kiyoshi
金额：
$ 15.81万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (A)
财政年份：
2010
资助国家：
日本
起止时间：
2010 至 2012
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22685019/
关键词：
ナノ粒子液晶メタマテリアルデバイス自己組織化

项目摘要

Nanoparticle (NP)-based periodic structure formation has attracted a considerable attention as metamaterials. Among organic soft materials, liquid-crystalline (LC) organic dendron is one of the most representatives to form spherical dendrimer-like structures by the self-assembling property. Thus, we focused our attention on introduction of such self-organization ability into inorganic NPs. As dendrons, we synthesized phenetyl ether-type dendrons G1-G3 with an amino-group at the apex. G1-G3 themselves show thermotropic LC phases. The dendrons are attached as the outer corona, through amidation, to the carboxylic groups at the surface of the inner aliphatic corona encapsulating the NP. Purpose-designed CO_2H-modified monodisperse gold NPs A1-A3 were synthesized uisng 12-dodecanethiol (DT) and 16-mercaptohexadecanoic acid (MHA). SAXS measurement revealed that G2-modified A2 showed an LC hexagonal columnar phase at 130 ℃ and formed a simple cubic (SC) LC phase at 150 ℃. The dendron-modified gold NPs G/A can be regarded as organic-inorganic hybrid dendrimers with thermotropic LC behaviour. The technique also applied to CdS NPs., and emission-quenching behavior by control of the self-organized structure was observed. Such behavior can be applicable for the development of NP-based novel-type of metamaterials.

在有机软材料中，基于纳米颗粒（NP）的周期性结构的形成引起了相当大的关注，液晶（LC）有机树枝状分子是通过自组装特性形成球形树枝状结构的最有代表性的材料之一。因此，我们将注意力集中在将这种自组织能力引入无机纳米粒子作为树枝状分子中，我们合成了苯醚型树枝状分子G1-G3。顶端的氨基基团本身显示出热致液晶相，通过酰胺化，树枝状分子连接到封装 NP 的内部脂肪族冠表面的羧基上。使用 12-十二烷硫醇 (DT) 合成了修饰的单分散金纳米粒子 A1-A3 16-巯基十六烷酸（MHA）测量表明，G2修饰的A2在130℃时呈现出六方柱状液晶相，在150℃时形成简单的立方（SC）液晶相，可以得到树枝状修饰的金纳米粒子G/A。被视为具有热致液晶行为的有机-无机杂化树枝状聚合物，该技术也适用于 CdS NP。观察到通过控制自组织结构的发射猝灭行为，这种行为可用于基于纳米粒子的新型超材料的开发。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Atsushi Sugie, Kenta Kumazawa, Tomomi Hatta, Kiyoshi Kanie, Atsushi Muramatsu, Atsunori Mori

杉江敦、熊泽健太、八田智美、蟹江清、村松敦、森敦典

DOI：
发表时间：
2011
期刊：
影响因子：
1.6
作者：
Cross Coupling on Gold Nanoparticles. Effect of Reinforced Affinity of Organic Group with Bipedal Thiol
通讯作者：
Cross Coupling on Gold Nanoparticles. Effect of Reinforced Affinity of Organic Group with Bipedal Thiol

Solvent Diversity in the Preparation of Alkanethiol-capped Gold Nanoparticles. An Approach with a Gold(I) Thiolate Complex

烷硫醇封端的金纳米颗粒制备中的溶剂多样性。