General Synthesis of Large Inorganic Nanosheets via 2D Confined Assembly of Nanoparticles
Abstract
Assembling nanoparticles to spatially well-defined functional nanomaterials and sophisticated architectures has been an intriguing goal for scientists. However, maintaining a long-range order of assembly to create macrostructures remains a challenge, owing to the reliance on purely interparticle interactions. Here, we present a general strategy to synthesize a class of inorganic nanosheets via a bottom-up directional freezing method. In this work, we demonstrate that, by confining a homogeneously dispersed metal-cyano colloidal suspension at the ice–water interface, followed by removal of ice crystals, large nanosheets with a lateral scale of up to several millimeters can be produced. The formation of millimeter-sized nanosheets is attributed to balanced electrostatic forces between dispersed nanoparticles, coupled with an appropriate hydrodynamic size of nanoparticles, potentially favorable lattice matching between nanoparticles and ice crystals, and the intermediate water at the ice–particle interface. The highly anisotropic growth of ice crystals can therefore guide the 2D confined assembly of nanoparticles in a long-range order, leading to well-defined 2D nanosheets. This contribution sheds light on the potential of nanoparticle assembly at larger length scales in designing families of large 2D nanoarchitectures for practical applications.
- Authors:
-
[1];
[2];
[1]
- Materials Science and Engineering Program and Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
- Publication Date:
- Research Org.:
- Univ. of Texas, Austin, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 1865208
- Alternate Identifier(s):
- OSTI ID: 1865379; OSTI ID: 1869833
- Grant/Contract Number:
- SC0019019; 52006130
- Resource Type:
- Published Article
- Journal Name:
- ACS Central Science
- Additional Journal Information:
- Journal Name: ACS Central Science Journal Volume: 8 Journal Issue: 5; Journal ID: ISSN 2374-7943
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Ice; Freezing; Nanoparticles; Two dimensional materials; Crystals
Citation Formats
Fang, Zhiwei, Tang, Sishuang, Wang, Zequn, An, Meng, and Yu, Guihua. General Synthesis of Large Inorganic Nanosheets via 2D Confined Assembly of Nanoparticles. United States: N. p., 2022.
Web. doi:10.1021/acscentsci.2c00252.
Fang, Zhiwei, Tang, Sishuang, Wang, Zequn, An, Meng, & Yu, Guihua. General Synthesis of Large Inorganic Nanosheets via 2D Confined Assembly of Nanoparticles. United States. https://doi.org/10.1021/acscentsci.2c00252
Fang, Zhiwei, Tang, Sishuang, Wang, Zequn, An, Meng, and Yu, Guihua. Wed .
"General Synthesis of Large Inorganic Nanosheets via 2D Confined Assembly of Nanoparticles". United States. https://doi.org/10.1021/acscentsci.2c00252.
@article{osti_1865208,
title = {General Synthesis of Large Inorganic Nanosheets via 2D Confined Assembly of Nanoparticles},
author = {Fang, Zhiwei and Tang, Sishuang and Wang, Zequn and An, Meng and Yu, Guihua},
abstractNote = {Assembling nanoparticles to spatially well-defined functional nanomaterials and sophisticated architectures has been an intriguing goal for scientists. However, maintaining a long-range order of assembly to create macrostructures remains a challenge, owing to the reliance on purely interparticle interactions. Here, we present a general strategy to synthesize a class of inorganic nanosheets via a bottom-up directional freezing method. In this work, we demonstrate that, by confining a homogeneously dispersed metal-cyano colloidal suspension at the ice–water interface, followed by removal of ice crystals, large nanosheets with a lateral scale of up to several millimeters can be produced. The formation of millimeter-sized nanosheets is attributed to balanced electrostatic forces between dispersed nanoparticles, coupled with an appropriate hydrodynamic size of nanoparticles, potentially favorable lattice matching between nanoparticles and ice crystals, and the intermediate water at the ice–particle interface. The highly anisotropic growth of ice crystals can therefore guide the 2D confined assembly of nanoparticles in a long-range order, leading to well-defined 2D nanosheets. This contribution sheds light on the potential of nanoparticle assembly at larger length scales in designing families of large 2D nanoarchitectures for practical applications.},
doi = {10.1021/acscentsci.2c00252},
journal = {ACS Central Science},
number = 5,
volume = 8,
place = {United States},
year = {Wed Apr 27 00:00:00 EDT 2022},
month = {Wed Apr 27 00:00:00 EDT 2022}
}
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