A Low-Symmetry Cubic Mesophase of Dendronized CdS Nanoparticles and Their Structure-Dependent Photoluminescence

被引：24

作者：

Matsubara, Masaki ^{[1
,5
]}

Stevenson, Warren ^{[2
]}

Yabuki, Jun ^{[1
]}

Zeng, Xiangbing ^{[2
]}

Dong, Haoliang ^{[2
]}

Kojima, Kazunobu ^{[1
]}

Chichibu, Shigefusa F. ^{[1
]}

Tamada, Kaoru ^{[3
]}

Muramatsu, Atsushi ^{[1
]}

Ungar, Goran ^{[2
,4
]}

Kanie, Kiyoshi ^{[1
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Katahira 2-1-1, Sendai, Miyagi 9808577, Japan

[2] Univ Sheffield, Dept Mat Sci & Engn, Sheffield S1 3JD, S Yorkshire, England

[3] Kyushu Univ, Inst Mat Chem & Engn, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

[4] Zhejiang Sci Tech Univ, Dept Phys, Xiasha Coll Pk, Hangzhou 310018, Zhejiang, Peoples R China

[5] Sendai Coll, Natl Inst Technol, Dept Mat & Environm Engn, 48 Nodayama, Natori, Miyagi 9811239, Japan

来源：

CHEM | 2017年 / 2卷 / 06期

基金：

美国国家科学基金会; 日本学术振兴会; 中国国家自然科学基金; 英国工程与自然科学研究理事会;

关键词：

SEMICONDUCTOR QUANTUM DOTS; HYBRID LIQUID-CRYSTALS; GOLD NANOPARTICLES; SOLAR-CELLS; FRANK-KASPER; HIGH-QUALITY; NANOCRYSTALS; ARRAYS; SIZE; CRYSTALLIZATION;

D O I：

10.1016/j.chempr.2017.05.001

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A liquid crystal (LC) phase with P213 symmetry, the lowest so far in a cubic LC, was obtained in a system of CdS quantum dots (QDs) modified with a two-layer corona of aliphatic thiols (inner) and LC aromatic dendrons (outer). We propose that the unusual low symmetry of this cubic mesophase is a result of the multilayered corona, which prefers to adopt an anisotropic radial profile because of the combination of long and short "bristles.'' The anisotropic distribution of dendrons (long bristles) in the P213 phase is thought to facilitate pi-pi interaction among the aromatic moieties. The interaction gives rise to non-radiative exciton energy-transfer pathways that induce photoluminescence quenching of the CdS QDs. This is believed to be the first example of structure-dependent emission-quenching behavior.

引用

页码：860 / 876

页数：17

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