Imperial College London
Alternate

DrIainDunlop

Faculty of Engineering, Department of Materials

Reader in Biomaterials and Cell Engineering
 
 
 
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Contact

 

+44 (0)20 7594 6731i.dunlop

 
 
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Location

 

1.02Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Podhorska:2016:10.1021/acs.langmuir.6b01900,
author = {Podhorska, L and Delcassian, D and Goode, AE and Agyei, M and McComb, DW and Ryan, MP and Dunlop, IE},
doi = {10.1021/acs.langmuir.6b01900},
journal = {Langmuir},
pages = {9216--9222},
title = {Mechanisms of polymer-templated nanoparticle synthesis: contrasting ZnS and Au},
url = {http://dx.doi.org/10.1021/acs.langmuir.6b01900},
volume = {32},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We combine solution small-angle X-ray scattering (SAXS) and high-resolution analytical transmission electron microscopy (ATEM) to gain a full mechanistic understanding of substructure formation in nanoparticles templated by block copolymer reverse micelles, specifically poly(styrene)-block-poly(2-vinyl pyridine). We report a novel substructure for micelle-templated ZnS nanoparticles, in which small crystallites (~4 nm) exist within a larger (~20 nm) amorphous organic-inorganic hybrid matrix. The formation of this complex structure is explained via SAXS measurements that characterize in situ for the first time the intermediate state of the metal-loaded micelle core: Zn2+ ions are distributed throughout the micelle core, which solidifies as a unit on sulfidation. The nanoparticle size is thus determined by the radius of the metal-loaded core, rather than the quantity of available metal ions. This mechanism leads to particle size counter-intuitively decreasing with increasing metal content, based on the modified interactions of the metal-complexed monomers in direct contrast to gold nanoparticles templated by the same polymer.
AU  - Podhorska,L
AU  - Delcassian,D
AU  - Goode,AE
AU  - Agyei,M
AU  - McComb,DW
AU  - Ryan,MP
AU  - Dunlop,IE
DO  - 10.1021/acs.langmuir.6b01900
EP  - 9222
PY  - 2016///
SN  - 0743-7463
SP  - 9216
TI  - Mechanisms of polymer-templated nanoparticle synthesis: contrasting ZnS and Au
T2  - Langmuir
UR  - http://dx.doi.org/10.1021/acs.langmuir.6b01900
UR  - http://hdl.handle.net/10044/1/39449
VL  - 32
ER  -
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