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Title: Interaction potentials of anisotropic nanocrystals from the trajectory sampling of particle motion using in situ liquid phase transmission electron microscopy

Abstract

We demonstrate a generalizable strategy to use the relative trajectories of pairs and groups of nanocrystals, and potentially other nanoscale objects, moving in solution which can now be obtained by in situ liquid phase transmission electron microscopy (TEM) to determine the interaction potentials between nanocrystals. Such nanoscale interactions are crucial for collective behaviors and applications of synthetic nanocrystals and natural biomolecules, but have been very challenging to measure in situ at nanometer or sub-nanometer resolution. Here we use liquid phase TEM to extract the mathematical form of interaction potential between nanocrystals from their sampled trajectories. We show the power of this approach to reveal unanticipated features of nanocrystal-nanocrystal interactions by examining the anisotropic interaction potential between charged rod-shaped Au nanocrystals (Au nanorods); these Au nanorods assemble, in a tip-to-tip fashion in the liquid phase, in contrast to the well-known side-by-side arrangements commonly observed for drying-mediated assembly. These observations can be explained by a long-range and highly anisotropic electrostatic repulsion that leads to the tip-selective attachment. As a result, Au nanorods stay unassembled at a lower ionic strength, as the electrostatic repulsion is even longer-ranged. Our study not only provides a mechanistic understanding of the process by which metallic nanocrystals assemblemore » but also demonstrates a method that can potentially quantify and elucidate a broad range of nanoscale interactions relevant to nanotechnology and biophysics.« less

Authors:
 [1];  [2];  [3];  [4];  [1];  [2]
+ Show Author Affiliations
  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); King Abdulaziz City for Science and Technology (Kingdom of Saudi Arabia)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  4. Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Defense Threat Reduction Agency (DTRA); USDOE Office of Science (SC)
OSTI Identifier:
1214195
Alternate Identifier(s):
OSTI ID: 1545127
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
ACS Central Science
Additional Journal Information:
Journal Volume: 1; Journal Issue: 1; Journal ID: ISSN 2374-7943
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY

Citation Formats

Chen, Qian, Cho, Hoduk, Manthiram, Karthish, Yoshida, Mark, Ye, Xingchen, and Alivisatos, A. Paul. Interaction potentials of anisotropic nanocrystals from the trajectory sampling of particle motion using in situ liquid phase transmission electron microscopy. United States: N. p., 2015. Web. doi:10.1021/acscentsci.5b00001.
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Chen, Qian, Cho, Hoduk, Manthiram, Karthish, Yoshida, Mark, Ye, Xingchen, & Alivisatos, A. Paul. Interaction potentials of anisotropic nanocrystals from the trajectory sampling of particle motion using in situ liquid phase transmission electron microscopy. United States. https://doi.org/10.1021/acscentsci.5b00001
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Chen, Qian, Cho, Hoduk, Manthiram, Karthish, Yoshida, Mark, Ye, Xingchen, and Alivisatos, A. Paul. Mon . "Interaction potentials of anisotropic nanocrystals from the trajectory sampling of particle motion using in situ liquid phase transmission electron microscopy". United States. https://doi.org/10.1021/acscentsci.5b00001. https://www.osti.gov/servlets/purl/1214195.
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@article{osti_1214195,
title = {Interaction potentials of anisotropic nanocrystals from the trajectory sampling of particle motion using in situ liquid phase transmission electron microscopy},
author = {Chen, Qian and Cho, Hoduk and Manthiram, Karthish and Yoshida, Mark and Ye, Xingchen and Alivisatos, A. Paul},
abstractNote = {We demonstrate a generalizable strategy to use the relative trajectories of pairs and groups of nanocrystals, and potentially other nanoscale objects, moving in solution which can now be obtained by in situ liquid phase transmission electron microscopy (TEM) to determine the interaction potentials between nanocrystals. Such nanoscale interactions are crucial for collective behaviors and applications of synthetic nanocrystals and natural biomolecules, but have been very challenging to measure in situ at nanometer or sub-nanometer resolution. Here we use liquid phase TEM to extract the mathematical form of interaction potential between nanocrystals from their sampled trajectories. We show the power of this approach to reveal unanticipated features of nanocrystal-nanocrystal interactions by examining the anisotropic interaction potential between charged rod-shaped Au nanocrystals (Au nanorods); these Au nanorods assemble, in a tip-to-tip fashion in the liquid phase, in contrast to the well-known side-by-side arrangements commonly observed for drying-mediated assembly. These observations can be explained by a long-range and highly anisotropic electrostatic repulsion that leads to the tip-selective attachment. As a result, Au nanorods stay unassembled at a lower ionic strength, as the electrostatic repulsion is even longer-ranged. Our study not only provides a mechanistic understanding of the process by which metallic nanocrystals assemble but also demonstrates a method that can potentially quantify and elucidate a broad range of nanoscale interactions relevant to nanotechnology and biophysics.},
doi = {10.1021/acscentsci.5b00001},
journal = {ACS Central Science},
number = 1,
volume = 1,
place = {United States},
year = {Mon Mar 23 00:00:00 EDT 2015},
month = {Mon Mar 23 00:00:00 EDT 2015}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1021/acscentsci.5b00001
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Figures / Tables:

Figure 1 Figure 1: In situ liquid phase TEM imaging of tip-to-tip assembly of Au nanorods. (A) The liquid flow TEM setup, with Si3N4 windowed microchips. Well-dispersed Au nanorods self-assemble under the illumination of electron beam. (B) Representative TEM image (left) and schematics (right) showing the final assembled structures. (C) A timemore » series of TEM images showing how nanorods approach and attach to each other. Red arrows highlight the trajectories of nanorods before they attach to the cluster of growing rod assemblies. Scale bar is 100 nm.« less
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    • De Yoreo, J. J.; Gilbert, P. U. P. A.; Sommerdijk, N. A. J. M.
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    • DOI: 10.1126/science.aaa6760

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    • DOI: 10.1039/c9nj03520f

    In-situ liquid-cell TEM study of radial flow-guided motion of octahedral Au nanoparticles and nanoparticle clusters
    journal, April 2018

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