@article{6fb4cb67dd154566b2f0dae06ea616b5,
title = "A Low-Symmetry Cubic Mesophase of Dendronized CdS Nanoparticles and Their Structure-Dependent Photoluminescence",
abstract = "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 multi-layered 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 π-π 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.",
keywords = "GISAXS, cubic phases, dendrimers, liquid crystals, nanoparticles, organic-inorganic hybrid materials, photoluminescence, quantum dots, self-organization",
author = "Masaki Matsubara and Warren Stevenson and Jun Yabuki and Xiangbing Zeng and Haoliang Dong and Kazunobu Kojima and Chichibu, {Shigefusa F.} and Kaoru Tamada and Atsushi Muramatsu and Goran Ungar and Kiyoshi Kanie",
note = "Funding Information: We thank Dr. G. Nisbet and Prof. S. Collins of beamline I16 and Prof. N. Terrill of I22 at Diamond Light Source for help with X-ray synchrotron experiments. We also acknowledge Dr. M. Nakaya and Mr. I. Tanaka for the synthesis of CdS NPs. The authors thank the Japan Society for the Promotion of Science (Research Fellowship for Young Scientists no. 24?9313 to M.M., Grant-in-Aid for Young Scientific Research [A]?no. 22685019 to K. Kanie, Grant-in-Aid for Scientific Research [B] nos. 25288087 and 16H04190 to K. Kanie, and Bilateral Joint Research Projects to K. Kanie); the Asahi Glass Foundation (K. Kanie); the Super Hybrid Materials Development Project of the Japanese Ministry of International Trade and Industry and the New Energy and Industrial Technology Development Organization (A.M. and K. Kanie); Ministry of Education, Culture, Sports, Science, and Technology (MEXT) Management Expenses Grants for National Universities Corporations (K. Kojima, S.F.C., K.T., A.M., and K. Kanie); MEXT Photon and Quantum Basic Research Coordinated Development Program no. 13004017 (Frontier Softmaterial Beamline [FSBL, BL03XU] at SPring-8); the Partnerships for International Research and Education (PIRE) Program of the National Science Foundation and Engineering and Physical Sciences Research Council (project RENEW, EP-K034308); the Leverhulme Foundation (RPG-2012-804); and National Natural Science Foundation of China grant 21674099 (G.U.) for funding this work. Publisher Copyright: {\textcopyright} 2017 Elsevier Inc.",
year = "2017",
month = jun,
day = "8",
doi = "10.1016/j.chempr.2017.05.001",
language = "English",
volume = "2",
pages = "860--876",
journal = "Chem",
issn = "2451-9294",
publisher = "Elsevier Inc.",
number = "6",
}