Self-Assembly of Quantum Dot–Gold Heterodimer Nanocrystals with Orientational Order
Abstract
The self-assembly of nanocrystals into ordered superlattices is a powerful strategy for the production of functional nanomaterials. The assembly of well-ordered target structures, however, requires control over the building blocks’ size and shape as well as their interactions. While nanocrystals with homogeneous composition are now routinely synthesized with high precision and assembled into various ordered structures, high-quality multicomponent nanocrystals and their ordered assemblies are rarely reported. In this paper, we demonstrate the synthesis of quantum dot–gold (QD-Au) heterodimers. These heterodimers possess a uniform shape and narrow size distribution and are capped with oleylamine and dodecyltrimethylammonium bromide (DTAB). Assembly of the heterodimers results in a superlattice with long-range orientational alignment of dimers. Using synchrotron-based X-ray measurements, we characterize the complex superstructure formed from the dimers. Molecular dynamics simulations of a coarse-grained model suggest that anisotropic interactions between the quantum dot and gold components of the dimer drive superlattice formation. The high degree of orientational order demonstrated in this work is a potential route to nanomaterials with useful optoelectronic properties.
- Authors:
-
[1];
[2];
[3];
[2];
[1]
- Brown Univ., Providence, RI (United States). Dept. of Chemistry
- Univ. of Utah, Salt Lake City, UT (United States). Dept. of Chemistry
- Univ. of Connecticut, Storrs, CT (United States). Dept. of Chemistry
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1475146
- Report Number(s):
- BNL-209103-2018-JAAM
Journal ID: ISSN 1530-6984
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Letters
- Additional Journal Information:
- Journal Volume: 18; Journal Issue: 8; Journal ID: ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Self-assembly; colloidal nanocrystals; heterodimer; anisotropic interparticle interactions; molecular dynamics simulation
Citation Formats
Zhu, Hua, Fan, Zhaochuan, Yuan, Yucheng, Wilson, Mitchell A., Hills-Kimball, Katie, Wei, Zichao, He, Jie, Li, Ruipeng, Grünwald, Michael, and Chen, Ou. Self-Assembly of Quantum Dot–Gold Heterodimer Nanocrystals with Orientational Order. United States: N. p., 2018.
Web. doi:10.1021/acs.nanolett.8b01860.
Zhu, Hua, Fan, Zhaochuan, Yuan, Yucheng, Wilson, Mitchell A., Hills-Kimball, Katie, Wei, Zichao, He, Jie, Li, Ruipeng, Grünwald, Michael, & Chen, Ou. Self-Assembly of Quantum Dot–Gold Heterodimer Nanocrystals with Orientational Order. United States. doi:10.1021/acs.nanolett.8b01860.
Zhu, Hua, Fan, Zhaochuan, Yuan, Yucheng, Wilson, Mitchell A., Hills-Kimball, Katie, Wei, Zichao, He, Jie, Li, Ruipeng, Grünwald, Michael, and Chen, Ou. Tue .
"Self-Assembly of Quantum Dot–Gold Heterodimer Nanocrystals with Orientational Order". United States. doi:10.1021/acs.nanolett.8b01860. https://www.osti.gov/servlets/purl/1475146.
@article{osti_1475146,
title = {Self-Assembly of Quantum Dot–Gold Heterodimer Nanocrystals with Orientational Order},
author = {Zhu, Hua and Fan, Zhaochuan and Yuan, Yucheng and Wilson, Mitchell A. and Hills-Kimball, Katie and Wei, Zichao and He, Jie and Li, Ruipeng and Grünwald, Michael and Chen, Ou},
abstractNote = {The self-assembly of nanocrystals into ordered superlattices is a powerful strategy for the production of functional nanomaterials. The assembly of well-ordered target structures, however, requires control over the building blocks’ size and shape as well as their interactions. While nanocrystals with homogeneous composition are now routinely synthesized with high precision and assembled into various ordered structures, high-quality multicomponent nanocrystals and their ordered assemblies are rarely reported. In this paper, we demonstrate the synthesis of quantum dot–gold (QD-Au) heterodimers. These heterodimers possess a uniform shape and narrow size distribution and are capped with oleylamine and dodecyltrimethylammonium bromide (DTAB). Assembly of the heterodimers results in a superlattice with long-range orientational alignment of dimers. Using synchrotron-based X-ray measurements, we characterize the complex superstructure formed from the dimers. Molecular dynamics simulations of a coarse-grained model suggest that anisotropic interactions between the quantum dot and gold components of the dimer drive superlattice formation. The high degree of orientational order demonstrated in this work is a potential route to nanomaterials with useful optoelectronic properties.},
doi = {10.1021/acs.nanolett.8b01860},
journal = {Nano Letters},
number = 8,
volume = 18,
place = {United States},
year = {2018},
month = {7}
}
Search WorldCat to find libraries that may hold this journalWeb of Science
Figures / Tables:
Figure 1: (a) Typical TEM image of the heterodimer NCs. (Inset) Model of a heterodimer NC. (b) UV−vis absorption spectra before (black) and after (red) Au growth. (c) HR-TEM image clearly showing the dimer feature and the measured d spacings of the ZB-QD(220) and Au(111) planes. The scale bar ismore »
Works referencing / citing this record:
2D Freestanding Janus Gold Nanocrystal Superlattices
journal, May 2019
- Shi, Qianqian; Gómez, Daniel E.; Dong, Dashen
- Advanced Materials, Vol. 31, Issue 28
Superstructures of Multielement Colloidal Molecules: Efficient Pathways to Construct Reconfigurable Photonic and Phononic Crystals
journal, February 2019
- Aryana, Kiumars; Stahley, James B.; Parvez, Nishan
- Advanced Theory and Simulations, Vol. 2, Issue 5
Figures / Tables found in this record: