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Title: Shape-controlled synthesis and in situ characterisation of anisotropic Au nanomaterials using liquid cell transmission electron microscopy

Abstract

Understanding the mechanisms behind crystal nucleation and growth is a fundamental requirement for the design and production of bespoke nanomaterials with controlled sizes and morphologies. Herein, we select gold (Au) nanoparticles as the model system for our study due to their representative applications in biology, electronics and optoelectronics. We investigate the radiation-induced in situ growth of gold (Au) particles using liquid cell transmission electron microscopy (LCTEM) and study the growth kinetics of non-spherical Au structures. Under controlled electron fluence, liquid flow rate and Au3+ ion supply, we show the favoured diffusion-limited growth of highly-twinned nascent Au seed particles into branched structures when using thin liquid cells (100 nm and 250 nm) in LCTEM, whereas faceted structures (e.g., spheres, rods, and prisms) formed when using a 1 μm thick liquid cell. We propose that the diffusion-controlled branched Au particle growth in the thin liquid cells results from the lower number and twinning of nascent seed particles. In addition, we observed 2 that anisotropic Au growth could be modulated by Au-binding amyloid fibrils, which we ascribe to their capability of regulating Au3+ ion diffusion and mass transfer in solution. We anticipate that this study will provide new perspectives on the shapecontrolled synthesismore » of anisotropic metallic nanomaterials using LCTEM.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [3];  [3]; ORCiD logo [1]
  1. Imperial College London, London (United Kingdom). Dept. of Materials
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Physical & Life Sciences Directorate
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
  4. Imperial College London, London (United Kingdom). Dept. of Materials, Dept. of Bioengineering
  5. University of York; Heslington (United Kingdom). Dept. of Physics
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Scientific User Facilities Division (SC-22.3 )
OSTI Identifier:
1561948
Alternate Identifier(s):
OSTI ID: 1562738
Grant/Contract Number:  
AC02-05CH11231; AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Nanoscale
Additional Journal Information:
Journal Volume: 11; Journal Issue: 36; Journal ID: ISSN 2040-3364
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY

Citation Formats

Wang, Shih-Ting, Lin, Yiyang, Nielsen, Michael H., Song, Cheng Yu, Thomas, Michael R., Spicer, Christopher D., Kröger, Roland, Ercius, Peter, Aloni, Shaul, and Stevens, Molly M. Shape-controlled synthesis and in situ characterisation of anisotropic Au nanomaterials using liquid cell transmission electron microscopy. United States: N. p., 2019. Web. doi:10.1039/c9nr01474h.
Wang, Shih-Ting, Lin, Yiyang, Nielsen, Michael H., Song, Cheng Yu, Thomas, Michael R., Spicer, Christopher D., Kröger, Roland, Ercius, Peter, Aloni, Shaul, & Stevens, Molly M. Shape-controlled synthesis and in situ characterisation of anisotropic Au nanomaterials using liquid cell transmission electron microscopy. United States. doi:10.1039/c9nr01474h.
Wang, Shih-Ting, Lin, Yiyang, Nielsen, Michael H., Song, Cheng Yu, Thomas, Michael R., Spicer, Christopher D., Kröger, Roland, Ercius, Peter, Aloni, Shaul, and Stevens, Molly M. Tue . "Shape-controlled synthesis and in situ characterisation of anisotropic Au nanomaterials using liquid cell transmission electron microscopy". United States. doi:10.1039/c9nr01474h.
@article{osti_1561948,
title = {Shape-controlled synthesis and in situ characterisation of anisotropic Au nanomaterials using liquid cell transmission electron microscopy},
author = {Wang, Shih-Ting and Lin, Yiyang and Nielsen, Michael H. and Song, Cheng Yu and Thomas, Michael R. and Spicer, Christopher D. and Kröger, Roland and Ercius, Peter and Aloni, Shaul and Stevens, Molly M.},
abstractNote = {Understanding the mechanisms behind crystal nucleation and growth is a fundamental requirement for the design and production of bespoke nanomaterials with controlled sizes and morphologies. Herein, we select gold (Au) nanoparticles as the model system for our study due to their representative applications in biology, electronics and optoelectronics. We investigate the radiation-induced in situ growth of gold (Au) particles using liquid cell transmission electron microscopy (LCTEM) and study the growth kinetics of non-spherical Au structures. Under controlled electron fluence, liquid flow rate and Au3+ ion supply, we show the favoured diffusion-limited growth of highly-twinned nascent Au seed particles into branched structures when using thin liquid cells (100 nm and 250 nm) in LCTEM, whereas faceted structures (e.g., spheres, rods, and prisms) formed when using a 1 μm thick liquid cell. We propose that the diffusion-controlled branched Au particle growth in the thin liquid cells results from the lower number and twinning of nascent seed particles. In addition, we observed 2 that anisotropic Au growth could be modulated by Au-binding amyloid fibrils, which we ascribe to their capability of regulating Au3+ ion diffusion and mass transfer in solution. We anticipate that this study will provide new perspectives on the shapecontrolled synthesis of anisotropic metallic nanomaterials using LCTEM.},
doi = {10.1039/c9nr01474h},
journal = {Nanoscale},
number = 36,
volume = 11,
place = {United States},
year = {2019},
month = {1}
}

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