Imperial College London

ProfessorMaryRyan

Faculty of EngineeringDepartment of Materials

Vice-Dean (Research), Faculty of Engineering
 
 
 
//

Contact

 

+44 (0)20 7594 6755m.p.ryan

 
 
//

Location

 

B338Royal School of MinesSouth Kensington Campus

//

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}
}

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 -