Volume 53, Issue 46 pp. 12548-12554
Communication

Highly Ordered and Highly Aligned Two-Dimensional Binary Superlattice of a SWNT/Cylindrical-Micellar System

Sung-Hwan Lim

Sung-Hwan Lim

Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701 (Republic of Korea) http://neutron.kaist.ac.kr

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Dr. Hyung-Sik Jang

Dr. Hyung-Sik Jang

Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701 (Republic of Korea) http://neutron.kaist.ac.kr

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Jae-Min Ha

Jae-Min Ha

Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701 (Republic of Korea) http://neutron.kaist.ac.kr

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Dr. Tae-Hwan Kim

Dr. Tae-Hwan Kim

Neutron Science Division, Department of Reactor Utilization and Development, Korea Atomic Energy Research Institute, Daejeon 305-353 (Republic of Korea)

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Dr. Pawel Kwasniewski

Dr. Pawel Kwasniewski

European Synchrotron Radiation Facility, BP 220, 38043 Grenoble (France)

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Dr. Theyencheri Narayanan

Dr. Theyencheri Narayanan

European Synchrotron Radiation Facility, BP 220, 38043 Grenoble (France)

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Dr. Kyeong Sik Jin

Dr. Kyeong Sik Jin

Pohang Accelerator Laboratory, University of Science and Technology, Pohang, 790-784 (Republic of Korea)

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Prof. Sung-Min Choi

Corresponding Author

Prof. Sung-Min Choi

Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701 (Republic of Korea) http://neutron.kaist.ac.kr

Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701 (Republic of Korea) http://neutron.kaist.ac.krSearch for more papers by this author
First published: 22 September 2014
Citations: 7

This research was supported by NRF grants funded by the MEST of the Korean government (No. 2014R1A2A1A05007109 and 2011-0031931) and the KAERI grant. We acknowledge the HANARO Neutron Research Center, the PAL, and the ESRF for providing access to the beamlines used in this study. SWNT=single-walled carbon nanotube.

Graphical Abstract

Binary superlattice of 1D nanoobjects: A highly ordered intercalated hexagonal binary superlattice was formed when hydrophilically functionalized SWNTs were added to a hexagonally packed C12E5 cylindrical-micellar system. In this binary superlattice, a hexagonal array of SWNTs is embedded in a honeycomb lattice of C12E5 cylinders (see picture), thus maximizing the free-volume entropies for both types of cylinders.

Abstract

We report a highly ordered intercalated hexagonal binary superlattice of hydrophilically functionalized single-walled carbon nanotubes (p-SWNTs) and surfactant (C12E5) cylindrical micelles. When p-SWNTs (with a diameter slightly larger than that of the C12E5 cylinders) were added to the hexagonally packed C12E5 cylindrical-micellar system, p-SWNTs positioned themselves in such a way that the free-volume entropies for both p-SWNTs and C12E5 cylinders were maximized, thus resulting in the intercalated hexagonal binary superlattice. In this binary superlattice, a hexagonal array of p-SWNTs is embedded in a honeycomb lattice of C12E5 cylinders. The intercalated hexagonal binary superlattice can be highly aligned in one direction by an oscillatory shear field and remains aligned after the shear is removed.

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