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Title: Interplay between Short and Long-Ranged Forces Leading to the Formation of Ag Nanoparticle Superlattice

Abstract

Nanoparticle (NP) superlattices have attracted increasing attention due to their unique properties. However, key questions remain for predicting the nanoparticle behavior from interparticle forces, especially the role of hydration force (Fhyd) and its correlation to other forces, regarding the transient and final superlattice configurations. Here we investigated the self-assembly of Ag NPs in aqueous solution by employing in situ liquid cell transmission electron microscopy, combined with atomic force microscopy based force measurements and theoretical calculations. In spite of instantaneous Brownian motion of NPs, a correlation between velocity and van der Waals force (FvdW) on average was observed during the later self-assembly process. In the post-assembly state, a delicate balance between Fhyd and FvdW gives rise to ~ 0.6~0.9 nm separation be-tween NPs in the superlattice. Our study demonstrates pivotal roles of interparticle forces, enabling the control of the separation which is critical for tailoring the properties of superlattices.

Authors:
 [1];  [1];  [1];  [2];  [1];  [3]; ORCiD logo [1]; ORCiD logo [1]
  1. BATTELLE (PACIFIC NW LAB)
  2. North University of China
  3. Lawrence Berkeley National Laboratory
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1572655
Report Number(s):
PNNL-SA-142641
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Small
Additional Journal Information:
Journal Volume: 15; Journal Issue: 33
Country of Publication:
United States
Language:
English

Citation Formats

Lee, Jaewon, Nakouzi, Elias, Xiao, Dongdong, Wu, Zhigang, Song, Miao, Ophus, Colin, Chun, Jaehun, and Li, Dongsheng. Interplay between Short and Long-Ranged Forces Leading to the Formation of Ag Nanoparticle Superlattice. United States: N. p., 2019. Web. doi:10.1002/smll.201901966.
Lee, Jaewon, Nakouzi, Elias, Xiao, Dongdong, Wu, Zhigang, Song, Miao, Ophus, Colin, Chun, Jaehun, & Li, Dongsheng. Interplay between Short and Long-Ranged Forces Leading to the Formation of Ag Nanoparticle Superlattice. United States. doi:10.1002/smll.201901966.
Lee, Jaewon, Nakouzi, Elias, Xiao, Dongdong, Wu, Zhigang, Song, Miao, Ophus, Colin, Chun, Jaehun, and Li, Dongsheng. Fri . "Interplay between Short and Long-Ranged Forces Leading to the Formation of Ag Nanoparticle Superlattice". United States. doi:10.1002/smll.201901966.
@article{osti_1572655,
title = {Interplay between Short and Long-Ranged Forces Leading to the Formation of Ag Nanoparticle Superlattice},
author = {Lee, Jaewon and Nakouzi, Elias and Xiao, Dongdong and Wu, Zhigang and Song, Miao and Ophus, Colin and Chun, Jaehun and Li, Dongsheng},
abstractNote = {Nanoparticle (NP) superlattices have attracted increasing attention due to their unique properties. However, key questions remain for predicting the nanoparticle behavior from interparticle forces, especially the role of hydration force (Fhyd) and its correlation to other forces, regarding the transient and final superlattice configurations. Here we investigated the self-assembly of Ag NPs in aqueous solution by employing in situ liquid cell transmission electron microscopy, combined with atomic force microscopy based force measurements and theoretical calculations. In spite of instantaneous Brownian motion of NPs, a correlation between velocity and van der Waals force (FvdW) on average was observed during the later self-assembly process. In the post-assembly state, a delicate balance between Fhyd and FvdW gives rise to ~ 0.6~0.9 nm separation be-tween NPs in the superlattice. Our study demonstrates pivotal roles of interparticle forces, enabling the control of the separation which is critical for tailoring the properties of superlattices.},
doi = {10.1002/smll.201901966},
journal = {Small},
number = 33,
volume = 15,
place = {United States},
year = {2019},
month = {8}
}

Works referenced in this record:

Synergism in binary nanocrystal superlattices leads to enhanced p-type conductivity in self-assembled PbTe/Ag2Te thin films
journal, January 2007

  • Urban, Jeffrey J.; Talapin, Dmitri V.; Shevchenko, Elena V.
  • Nature Materials, Vol. 6, Issue 2, p. 115-121
  • DOI: 10.1038/nmat1826