Imperial College London
Alternate

Professor Molly Stevens

Faculty of Engineering, Department of Materials

Professor of Biomedical Materials and Regenerative Medicine
 
 
 
//

Contact

 

+44 (0)20 7594 6804m.stevens

 
 
//

Location

 

208Royal School of MinesSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Wang:2019:10.1039/C9NR01474H,
author = {Wang, S-T and Lin, Y and NIelsen, MH and Song, CY and Thomas, MT and Spicer, C and Kroger, R and Ercius, P and Aloni, S and Stevens, M},
doi = {10.1039/C9NR01474H},
journal = {Nanoscale},
pages = {16801--16809},
title = {Shape-controlled synthesis and in situ characterisation of anisotropic AU nanomaterials using liquid cell transmission electron microscopy},
url = {http://dx.doi.org/10.1039/C9NR01474H},
volume = {36},
year = {2019}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Understanding the mechanisms behind crystal nucleation and growth is afundamental requirement for the design and production of bespoke nanomaterials withcontrolled sizes and morphologies. Herein, we select gold (Au) nanoparticles as themodel system for our study due to their representative applications in biology,electronics and optoelectronics. We investigate the radiation-induced in situ growth ofgold (Au) particles using liquid cell transmission electron microscopy (LCTEM) andstudy the growth kinetics of non-spherical Au structures. Under controlled electronfluence, liquid flow rate and Au3+ ion supply, we show the favoured diffusion-limitedgrowth of multi-twinned nascent Au seed particles into branched structures when usingthin 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. In addition, weobserved 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.
AU  - Wang,S-T
AU  - Lin,Y
AU  - NIelsen,MH
AU  - Song,CY
AU  - Thomas,MT
AU  - Spicer,C
AU  - Kroger,R
AU  - Ercius,P
AU  - Aloni,S
AU  - Stevens,M
DO  - 10.1039/C9NR01474H
EP  - 16809
PY  - 2019///
SN  - 2040-3364
SP  - 16801
TI  - Shape-controlled synthesis and in situ characterisation of anisotropic AU nanomaterials using liquid cell transmission electron microscopy
T2  - Nanoscale
UR  - http://dx.doi.org/10.1039/C9NR01474H
UR  - https://pubs.rsc.org/en/content/articlelanding/2019/NR/C9NR01474H#!divAbstract
UR  - http://hdl.handle.net/10044/1/72994
VL  - 36
ER  -
Download