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Spontaneous Formation of Heterodimer Au–Fe7S8 Nanoplatelets by a Seeded Growth Approach

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Open access
Authors
Javaid, S.
Li, Y.
Chen, D.
Xu, X.
Pang, Y.
Chen, W.
Wang, F.
Shao, Zongping
Saunders, M.
Veder, Jean-Pierre
Jia, Guohua
Jones, Franca
Date
2019
Type
Journal Article

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Javaid, S. and Li, Y. and Chen, D. and Xu, X. and Pang, Y. and Chen, W. and Wang, F. et al. 2019. Spontaneous Formation of Heterodimer Au–Fe7S8 Nanoplatelets by a Seeded Growth Approach. Journal of Physical Chemistry C. 123 (16): pp. 10604-10613.
Source Title
Journal of Physical Chemistry C
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Faculty
Faculty of Science and Engineering
School
School of Molecular and Life Sciences (MLS)
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Abstract

Hybrid nanomaterials offer increased flexibility to achieve heterostructures with controlled functionalities and predictable linkages owing to their synergistic interactions. Here, we have developed a synthetic strategy that produced hexagonal-shaped nanoplatelets (NPLs) of gold-pyrrhotite (Au-Fe7S8) with Au embedded inside them by means of a seeded growth method. Using thiol-capped Au nanoparticles (NPs) as a seed, heterogeneous nucleation of the iron precursor was facilitated, leading to the formation of Au-Fe7S8 NPLs. The injection temperature and surface ligand of the seed (Au) were two critical factors that determined the homogeneity and final morphology of the Au-Fe7S8 NPLs. This strategy was further expanded using Ag NPs as the seed to construct heterodimers, producing Ag2S-Fe7S8 heterostructures.