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Title: Realignment of Nanocrystal Aggregates into Single Crystals as a Result of Inherent Surface Stress

Abstract

Assembly of nanoparticles building blocks during single crystal growth is widely observed in both natural and synthetic environments. Although this form of non-classical crystallization is generally described by oriented attachment, random aggregation of building blocks leading to single crystal products is also observed, but the mechanism of crystallographic realignment is unknown. We herein reveal that random attachment during aggregation-based growth initially produces a non-oriented growth front. Subsequent evolution of the orientation is driven by the inherent surface stress applied by the disordered surface layer and results in single crystal formation via grain boundary migration. This mechanism is corroborated by measurements of orientation rate vs external stress, demonstrating a predictive relationship between the two. These findings advance our understanding of aggregation-based growth of natural minerals by nanocrystals, and suggest an approach to material synthesis that takes advantage of stress induced co-alignment.

Authors:
 [1];  [2];  [1];  [1];  [3];  [1];  [4]
  1. Department of Chemistry, Zhejiang University, Hangzhou Zhejiang 310027 China
  2. Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou Zhejiang 310027 China
  3. Physical Sciences Division, Pacific Northwest National Laboratory, Richland WA 99354 USA
  4. Department of Chemistry, Zhejiang University, Hangzhou Zhejiang 310027 China; Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou Zhejiang 310027 China
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1342312
Report Number(s):
PNNL-SA-118982
Journal ID: ISSN 1433-7851; KC0302060
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 55; Journal Issue: 41
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Liu, Zhaoming, Pan, Haihua, Zhu, Genxing, Li, Yaling, Tao, Jinhui, Jin, Biao, and Tang, Ruikang. Realignment of Nanocrystal Aggregates into Single Crystals as a Result of Inherent Surface Stress. United States: N. p., 2016. Web. doi:10.1002/anie.201603794.
Liu, Zhaoming, Pan, Haihua, Zhu, Genxing, Li, Yaling, Tao, Jinhui, Jin, Biao, & Tang, Ruikang. Realignment of Nanocrystal Aggregates into Single Crystals as a Result of Inherent Surface Stress. United States. doi:10.1002/anie.201603794.
Liu, Zhaoming, Pan, Haihua, Zhu, Genxing, Li, Yaling, Tao, Jinhui, Jin, Biao, and Tang, Ruikang. Tue . "Realignment of Nanocrystal Aggregates into Single Crystals as a Result of Inherent Surface Stress". United States. doi:10.1002/anie.201603794.
@article{osti_1342312,
title = {Realignment of Nanocrystal Aggregates into Single Crystals as a Result of Inherent Surface Stress},
author = {Liu, Zhaoming and Pan, Haihua and Zhu, Genxing and Li, Yaling and Tao, Jinhui and Jin, Biao and Tang, Ruikang},
abstractNote = {Assembly of nanoparticles building blocks during single crystal growth is widely observed in both natural and synthetic environments. Although this form of non-classical crystallization is generally described by oriented attachment, random aggregation of building blocks leading to single crystal products is also observed, but the mechanism of crystallographic realignment is unknown. We herein reveal that random attachment during aggregation-based growth initially produces a non-oriented growth front. Subsequent evolution of the orientation is driven by the inherent surface stress applied by the disordered surface layer and results in single crystal formation via grain boundary migration. This mechanism is corroborated by measurements of orientation rate vs external stress, demonstrating a predictive relationship between the two. These findings advance our understanding of aggregation-based growth of natural minerals by nanocrystals, and suggest an approach to material synthesis that takes advantage of stress induced co-alignment.},
doi = {10.1002/anie.201603794},
journal = {Angewandte Chemie (International Edition)},
number = 41,
volume = 55,
place = {United States},
year = {Tue Jul 19 00:00:00 EDT 2016},
month = {Tue Jul 19 00:00:00 EDT 2016}
}