Leveraging the anisotropic shape of DNA-functionalized nanoparticles holds potential for shape-directed crystallization of a wide collection of superlattice structures. Using coarse-grained molecular dynamics simulations, we study the self-assembly of a binary mixture of cubic gold nanoparticles, which are functionalized by complementary DNA strands. We observe the spontaneous self-assembly of simple cubic (SC), plastic body-centered tetragonal (pBCT), and compositionally disordered plastic body-centered tetragonal (d-pBCT) phases due to hybridization of the DNA strands. We systematically investigate the effect of length, grafting density, as well as rigidity of the DNA strands on the self-assembly behavior of cubic nanoparticles. We measure the potential of mean force between DNA-functionalized nanocubes for varying rigidity of the DNA strands and DNA lengths. Using free-energy calculations, we find that longer and flexible DNA strands can lead to a phase transformation from SC to the pBCT phase due to a gain in entropy arising from the orientational degrees of freedom of the nanocubes in the pBCT phase. Our results may serve as a guide for self-assembly experiments on DNA-functionalized cubic nanoparticles.
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14 May 2023
Research Article|
May 12 2023
Shape-induced crystallization of binary DNA-functionalized nanocubes
Yunhan Zhang
;
Yunhan Zhang
a)
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
Department of Polymer Science and Engineering, CAS Key Laboratory of Soft Matter Chemistry, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China
, Hefei, Anhui 230026, People’s Republic of China
2
Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University
, Princetonplein 5, 3584 CC Utrecht, The Netherlands
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Giuliana Giunta
;
Giuliana Giunta
b)
(Methodology)
2
Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University
, Princetonplein 5, 3584 CC Utrecht, The Netherlands
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Haojun Liang
;
Haojun Liang
(Conceptualization, Funding acquisition, Methodology)
1
Department of Polymer Science and Engineering, CAS Key Laboratory of Soft Matter Chemistry, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China
, Hefei, Anhui 230026, People’s Republic of China
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Marjolein Dijkstra
Marjolein Dijkstra
a)
(Conceptualization, Funding acquisition, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing)
2
Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University
, Princetonplein 5, 3584 CC Utrecht, The Netherlands
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b)
Current address: BASF SE, Carl-Bosch-Strasse 38, 67056 Ludwigshafen am Rhein, Germany.
J. Chem. Phys. 158, 184902 (2023)
Article history
Received:
February 28 2023
Accepted:
April 21 2023
Connected Content
A companion article has been published:
New structures self-assemble from DNA-encased nanocubes
Citation
Yunhan Zhang, Giuliana Giunta, Haojun Liang, Marjolein Dijkstra; Shape-induced crystallization of binary DNA-functionalized nanocubes. J. Chem. Phys. 14 May 2023; 158 (18): 184902. https://doi.org/10.1063/5.0148139
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